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Software developers and creators of Open Source projects now have access to numerous services with complimentary tiers, yet locating them all requires a considerable time investment to ensure well-informed choices.
This compilation features software, including SaaS, PaaS, IaaS, and related offerings, specifically tailored to the needs of infrastructure developers such as System Administrators and DevOps Practitioners. While there's a plethora of free services available, this list prioritizes those most relevant to the specified audience. Contributions outside this scope might not be included. Your understanding is appreciated; this list aims to maintain a focused and targeted approach.
This list is a collaborative effort involving contributions from over 1100 individuals, encompassing pull requests, reviews, ideas, and ongoing maintenance. Your participation is encouraged, whether by submitting pull requests to include additional services or to remove outdated or retired offerings. This collective effort ensures the list remains comprehensive, up-to-date, and reflective of the evolving landscape of free developer tools and services.
Please be advised that this list exclusively features as-a-service offerings, excluding self-hosted software solutions. Eligible services must provide a free tier, not merely a free trial, with a minimum duration of one year if time-bucketed. Additionally, services must support Single Sign-On (SSO) to meet security standards, and TLS encryption should not be restricted to paid-only tiers. Your adherence to these criteria ensures the list maintains its focus on accessible and secure developer tools and services.
Google Cloud Platform
App Engine - 28 frontend instance hours per day, nine backend instance hours per day
Cloud Firestore - 1GB storage, 50,000 reads, 20,000 writes, 20,000 deletes per day
Compute Engine - 1 non-preemptible e2-micro, 30GB HDD, 5GB snapshot storage (restricted to certain regions), 1 GB network egress from North America to all region destinations (excluding China and Australia) per month
Cloud Storage - 5GB, 1GB network egress
Cloud Shell - Web-based Linux shell/primary IDE with 5GB of persistent storage. 60 hours limit per week
Cloud Pub/Sub - 10GB of messages per month
Cloud Functions - 2 million invocations per month (includes both background and HTTP invocations)
Cloud Run - 2 million requests per month, 360,000 GB-seconds memory, 180,000 vCPU-seconds of compute time, 1 GB network egress from North America per month
Google Kubernetes Engine - No cluster management fee for one zonal cluster. Each user node is charged at standard Compute Engine pricing
BigQuery - 1 TB of querying per month, 10 GB of storage each month
Cloud Build - 120 build minutes per day
Cloud Source Repositories - Up to 5 Users, 50 GB Storage, 50 GB Egress
Google Colab - Free Jupyter Notebooks development environment.
Full, detailed list - https://cloud.google.com/free
Amazon Web Services
CloudFront - 1TB egress per month and 2M Function invocations per month
* Cloudwatch - 10 custom metrics and 10 alarms
* CodeBuild - 100min of build time per month
* CodeCommit - 5 active users,50GB storage, and 10000 requests per month
* CodePipeline - 1 active pipeline per month
* DynamoDB - 25GB NoSQL DB
* EC2 - 750 hours per month of t2.micro or t3.micro(12mo). 100GB egress per month
* EBS - 30GB per month of General Purpose (SSD) or Magnetic(12mo)
* Elastic Load Balancing - 750 hours per month(12mo)
* RDS - 750 hours per month of db.t2.micro, db.t3.micro, or db.t4g.micro, 20GB of General Purpose (SSD) storage, 20GB of storage backups
* Glacier - 10GB long-term object storage
* Lambda - 1 million requests per month
* SNS - 1 million publishes per month
* SES - 3.000 messages per month (12mo)
* SQS - 1 million messaging queue requests
* Full, detailed list - https://aws.amazon.com/free/
Microsoft Azure
Virtual Machines - 1 B1S Linux VM, 1 B1S Windows VM (12mo)
App Service - 10 web, mobile, or API apps (60 CPU minutes/day)
Functions - 1 million requests per month
DevTest Labs - Enable fast, easy, and lean dev-test environments
Active Directory - 500,000 objects
Active Directory B2C - 50,000 monthly stored users
Azure DevOps - 5 active users, unlimited private Git repos
Azure Pipelines — 10 free parallel jobs with unlimited minutes for open source for Linux, macOS, and Windows
Microsoft IoT Hub - 8,000 messages per day
Load Balancer - 1 free public load-balanced IP (VIP)
Notification Hubs - 1 million push notifications
Bandwidth - 15GB Inbound(12mo) & 5GB egress per month
Cosmos DB - 25GB storage and 1000 RUs of provisioned throughput
Static Web Apps — Build, deploy, and host static apps and serverless functions with free SSL, Authentication/Authorization, and custom domains
Storage - 5GB LRS File or Blob storage (12mo)
Cognitive Services - AI/ML APIs (Computer Vision, Translator, Face detection, Bots, etc) with free tier including limited transactions
Cognitive Search - AI-based search and indexation service, free for 10,000 documents
Azure Kubernetes Service - Managed Kubernetes service, free cluster management
Event Grid - 100K ops/month
Full, detailed list - https://azure.microsoft.com/free/
Oracle Cloud
Compute
2 AMD-based Compute VMs with 1/8 OCPU and 1 GB memory each
4 Arm-based Ampere A1 cores and 24 GB of memory usable as one VM or up to 4 VMs
Instances will be reclaimed when deemed idle
Block Volume - 2 volumes, 200 GB total (used for compute)
Object Storage - 10 GB
Load balancer - 1 instance with 10 Mbps
Databases - 2 DBs, 20 GB each
Monitoring - 500 million ingestion data points, 1 billion retrieval data points
Bandwidth - 10 TB egress per month, speed limited to 50 Mbps on x64-based VM, 500 Mbps * core count on ARM-based VM
Public IP - 2 IPv4 for VMs, 1 IPv4 for load balancer
Notifications - 1 million delivery options per month, 1000 emails sent per month
Full, detailed list - https://www.oracle.com/cloud/free/
Object Storage - 25GB per month
Cloudant database - 1 GB of data storage
Db2 database - 100MB of data storage
API Connect - 50,000 API calls per month
Availability Monitoring - 3 million data points per month
Log Analysis - 500MB of daily log
Full, detailed list - https://www.ibm.com/cloud/free/
Application Services - Free DNS for an unlimited number of domains, DDoS Protection, CDN along with free SSL, Firewall rules and page rules, WAF, Bot Mitigation, Free Unmetered Rate Limiting - 1 rule per domain, Analytics, Email forwarding
Zero Trust & SASE - Up to 50 Users, 24 hours of activity logging, three network locations
Cloudflare Tunnel - You can expose a locally running HTTP port over a tunnel to a random subdomain on trycloudflare.com using Quick Tunnels, No account is required. More features (TCP tunnel, Load balancing, VPN) in Zero Trust Free Plan.
Workers - Deploy serverless code for free on Cloudflare's global network—100k daily requests.
Workers KV - 100k read requests per day, 1000 write requests per day, 1000 delete requests per day, 1000 list requests per day, 1 GB stored data
R2 - 10 GB per month, 1 million Class A operations per month, 10 million Class B operations per month
D1 - 5 million rows read per day, 100k rows written per day, 1 GB storage
Pages - Develop and deploy your web apps on Cloudflare's fast, secure global network. Five hundred monthly builds, 100 custom domains, Integrated SSL, unlimited accessible seats, unlimited preview deployments, and full-stack capability via Cloudflare Workers integration.
Queues - 1 million operations per month
Brainboard - Collaborative solution to visually build and manage cloud infrastructures from end to end.
Cloud 66 - Free for personal projects (includes one deployment server, one static site), Cloud 66 gives you everything you need to build, deploy, and grow your applications on any cloud without the headache of the “server stuff.”.
Pulumi — Modern infrastructure as a coding platform that allows you to use familiar programming languages and tools to build, deploy, and manage cloud infrastructure.
terraform.io — Terraform Cloud. Free remote state management and team collaboration for up to 500 resources.
scalr.com - Scalr is a Terraform Automation and COllaboration (TACO) product used to better collaboration and automation on infrastructure and configurations managed by Terraform. Full Terraform CLI support, OPA integration, and a hierarchical configuration model. No SSO tax. All features are included. Use up to 50 runs/month for free.
Bitbucket — Unlimited public and private Git repos for up to 5 users with Pipelines for CI/CD
chiselapp.com — Unlimited public and private Fossil repositories
codebasehq.com — One free project with 100 MB space and two users
Codeberg.org - Unlimited public and private Git repos for free and open-source projects. Static website hosting with Codeberg Pages.
GitGud — Unlimited private and public repositories. Free forever. Powered by GitLab & Sapphire. CI/CD not provided.
GitHub — Unlimited public repositories and unlimited private repositories (with unlimited collaborators). Apart from this, some other free services(there are many more, but we list the main ones here) provided are :
CI/CD(Free for Public Repos, 2000 min/month free for private repos)
Codespaces - Development environments hosted in the cloud. 120-core hours and 15 GB codespaces storage available for free every month.
Static Website Hosting (Free for Public Repos)
Package Hosting & Container Registry (Free for public repos,500 MB storage & 1GB bandwidth outside CI/CD free for private repos)
Project Management and issue Tracking.
GitHub Copilot — AI pair programmer and completion tool powered by OpenAI Codex. Provides code review, autocompletion, documentation, and refactoring. Free for students via the GitHub Student Developer Pack.
gitlab.com — Unlimited public and private Git repos with up to 5 collaborators. Also offers the following features :
CI/CD (Free for Public Repos, 400 mins/month for private repos)
Static Sites with GitLab Pages.
Container Registry with a 10 GB limit per repo.
Project Management and Issue Tracking.
IP.City — 100 Free IP geolocation requests per day
Abstract API — API suite for various use cases, including IP geolocation, gender detection, or email validation.
Apify — Web scraping and automation platform to create an API for any website and extract data. Ready-made scrapers, integrated proxies, and custom solutions. Free plan with $5 platform credits included every month.
API Mocha - Completely free online API mocking for testing and prototyping. Make up to 500 daily requests, fully customizable API responses, and download mock rules as a Postman collection.
APITemplate.io - Auto-generate images and PDF documents with a simple API or automation tools like Zapier & Airtable. No CSS/HTML is required. The free plan comes with 50 images/month and three templates.
APIToolkit.io - All the tools you need to fully understand what's going on in your APIs and Backends. With automatic API contract validation and monitoring. The free plan covers servers with up to 20,000 requests per month.
Arize AI - Machine learning observability for model monitoring and root-causing issues such as data quality and performance drift. Free up to two models.
Atlas toolkit - Lightweight library to develop single-page web applications that are instantly accessible. Available for Java, Node.js, Perl, Python, and Ruby.
bigml.com — Hosted machine learning algorithms. Unlimited free tasks for development, limit of 16 MB data/task.
Browse AI — Extracting and monitoring data on the web. Fifty credits per month for free.
BrowserCat - Headless browser API for automation, scraping, AI agent web access, image/pdf generation, and more. Free plan with 1k requests per month.
Bruzu — Automate Image production. Generate tons of Image variants with API, Integrations, or nocode sheet. API is FREE with a watermark.
Calendarific - Enterprise-grade Public holiday API service for over 200 countries. The free plan includes 1,000 calls per month.
Canopy - GraphQL API for Amazon.com product, search, and category data. The free plan includes 100 calls per month.
Clarifai — Image API for custom face recognition and detection. Able to train AI models. The free plan has 5,000 calls per month.
Cloudmersive — Utility API platform with full access to expansive API Library including Document Conversion, Virus Scanning, and more with 800 calls/month.
Colaboratory — Free web-based Python notebook environment with Nvidia Tesla K80 GPU.
Collect2 — Create an API endpoint to test, automate, and connect webhooks. The free plan allows for two datasets, 2000 records, one forwarder, and one alert.
CometML - The MLOps platform for experiment tracking, model production management, model registry, and complete data lineage, covering your workflow from training to production. Free for individuals and academics.
Commerce Layer - Composable commerce API that can build, place, and manage orders from any front end. The developer plan allows 100 orders per month and up to 1,000 SKUs for free.
Conversion Tools - Online File Converter for documents, images, video, audio, and eBooks. REST API is available. Libraries for Node.js, PHP, Python. Support files up to 50 GB (for paid plans). The free tier is limited by file size and number of conversions per day.
Coupler - Data integration tool that syncs between apps. It can create live dashboards and reports, transform and manipulate values, and collect and back up insights. The free plan has unlimited users, 100 runs with 1000 monthly rows, and unlimited integrations.
CraftMyPDF - Auto-Generate PDF documents from reusable templates with a drop-and-drop editor and a simple API. The free plan comes with 100 PDFs/month and three templates.
CurlHub — Proxy service for inspecting and debugging API calls. The free plan includes 10,000 requests per month.
CurrencyScoop - Realtime currency data API for fintech apps. The free plan includes 5,000 calls per month.
Cube - Cube helps data engineers and application developers access data from modern data stores, organize it into consistent definitions, and deliver it to every application. The fastest way to use Cube is with Cube Cloud, which has a free tier with 1GB of data passing through each month.
Data Dead Drop - Simple, free file sharing. Data self-destroys after access. Upload and download data via the browser or your favorite command line client.
Data Fetcher - Connect Airtable to any application or API with no code. Postman-like interface for running API requests in Airtable. Pre-built integrations with dozens of apps. The free plan includes 100 runs per month.
Dataimporter.io - Tool for connecting, cleaning, and importing data into Salesforce. Free Plan includes up to 20,000 records per month.
Datalore - Python notebooks by Jetbrains. Includes 10 GB of storage and 120 hours of runtime each month.
Data Miner - A browser extension (Google Chrome, MS Edge) for data extraction from web pages CSV or Excel. The free plan gives you 500 pages/month.
Datapane - API for building interactive reports in Python and deploying Python scripts and Jupyter Notebooks as self-service tools.
DB-IP - Free IP geolocation API with 1k request per IP per day.lite database under the CC-BY 4.0 License is free too.
DB Designer — Cloud-based Database schema design and modeling tool with a free starter plan of 2 Database models and ten tables per model.
DeepAR — Augmented reality face filters for any platform with one SDK. The free plan provides up to 10 monthly active users (MAU) and tracks up to 4 faces
Deepnote - A new data science notebook. Jupyter is compatible with real-time collaboration and running in the cloud. The free tier includes unlimited personal projects, up to 750 hours of standard hardware, and teams with up to 3 editors.
Diggernaut — Cloud-based web scraping and data extraction platform for turning any website to the dataset or working with it as an API. The free plan includes 5K page requests monthly.
Disease.sh — A free API providing accurate data for building the Covid-19 related useful Apps.
Doczilla — SaaS API empowering the generation of screenshots or PDFs directly from HTML/CSS/JS code. The free plan allows 250 documents month.
dreamfactory.com — Open source REST API backend for mobile, web, and IoT applications. Hook up any SQL/NoSQL database, file storage system, or external service, and it instantly creates a comprehensive REST API platform with live documentation and user management.
DynamicDocs - Generate PDF documents with JSON to PDF API based on LaTeX templates. The free plan allows 50 API calls per month and access to a library of templates.
Efemarai - Testing and debugging platform for ML models and data. Visualize any computational graph. Free 30 debugging sessions per month for developers.
Einblick - a modern data science platform that brings Python notebooks to a collaborative canvas and includes tools that automate everyday tasks such as building predictive models (AutoML) or comparing populations. The free tier consists of 5 canvases and unlimited collaborators.
Exspanse - MLOPS Platform to build, train and deploy ML models and AI solutions. The free plan allows the creation of unlimited projects, 5Gb of cloud storage, and five docker container images.
ExtendsClass - Free web-based HTTP client to send HTTP requests.
Export SDK - PDF generator API with drag-and-drop template editor that provides an SDK and no-code integrations. The free plan has 250 monthly pages, unlimited users, and three templates.
file.coffee - A platform where you can store up to 15MB/file (30/MB file with an account).
Flatirons Fuse - An embeddable CSV and spreadsheet import tool that makes data to your website fast, easy, and painless.
FraudLabs Pro — Screen an order transaction for credit card payment fraud. This REST API will detect all possible fraud traits based on the input parameters of an order. The Free Micro plan has 500 transactions per month.
Geekflare API - Geekflare API lets you take screenshots, audit websites, TLS scan, DNS lookup, test TTFB, and more. The free plan offers 3,000 API requests.
GeoCod — Free geocoding API: Convert postal addresses into geographic coordinates or convert geographic coordinates into postal addresses (reverse geocoding).
GeoDataSource — Location search service looks up city names using latitude and longitude coordinates. Free API queries up to 500 times per month.
Glitterly - Programmatically generate dynamic images from base templates. Restful API and nocode integrations. The free tier comes with 50 images/month and five templates.
GoodData - Data as a Service - Create interactive and insightful dashboards. The free tier comes with five workspaces and 100 MB/workspace.
Hex - a collaborative data platform for notebooks, data apps, and knowledge libraries. Free community version with up to 3 authors and five projects. One compute profile per author with 4GB RAM.
Hook0 - Hook0 is an open-source Webhooks-as-a-service (WaaS) that makes it easy for online products to provide webhooks. Dispatch up to 3,000 events/month with seven days of history retention for free.
Hoppscotch - A free, fast, and beautiful API request builder.
Hybiscus - Build pdf reports using a simple declarative API. The free tier includes up to 100 single-page reports per month with the ability to customize color palettes and fonts.
Invantive Cloud — Access over 70 (cloud)platforms such as Exact Online, Twinfield, ActiveCampaign or Visma using Invantive SQL or OData4 (typically Power BI or Power Query). Includes data replication and exchange. Free plan for developers and implementation consultants. Free for specific platforms with limitations in data volumes.
ipaddress.sh — Simple service to get a public IP address in different formats.
ipbase.com - IP Geolocation API - Forever free plan that spans 150 monthly requests.
Iploka — IP to Geolocation API - Forever free plan for developers with 10k requests per month limit.
IP Geolocation — IP Geolocation API - Forever free plan for developers with 30k requests per month (1k/day) limit.
IP Geolocation API — IP Geolocation API from Abstract - Extensive free plan allowing 20,000 monthly requests.
IP2Location — Freemium IP geolocation service. LITE database is available for free download. Import the database in the server and perform a local query to determine the city, coordinates, and ISP information.
IP2Location.io — Freemium, fast and reliable IP geolocation API to determine geolocation data like city, coordinates, ISP, etc. The free plan is available with 30k credits per month. Subscribe to paid plans for more advanced features or contact us for a personalized plan.
ipapi - IP Address Location API by Kloudend, Inc - A reliable geolocation API built on AWS, trusted by Fortune 500. The free tier offers 30k lookups/month (1k/day) without signup.
ipapi.is - A reliable IP Address API from Developers for Developers with the best Hosting Detection capabilities that exist. The free plan offers 1000 lookups without signup.
IPinfo — Fast, accurate, and free (up to 50k/month) IP address data API. Offers APIs with details on geolocation, companies, carriers, IP ranges, domains, abuse contacts, and more. All paid APIs can be trialed for free.
IPList — Lookup details about any IP address, such as Geo IP information, tor addresses, hostnames, and ASN details. Free for personal and business users.
BigDataCloud - Provides fast, accurate, and free (Unlimited or up to 10K-50K/month) APIs for modern web like IP Geolocation, Reverse Geocoding, Networking Insights, Email and Phone Validation, Client Info and more.
IPTrace — An embarrassingly simple API that provides your business with reliable and helpful IP geolocation data.
JSON2Video - A video editing API to automate video marketing and social media videos, programmatically or with no code.
JSON IP — Returns the Public IP address of the client it is requested from. No registration is required for the free tier. Using CORS, data can be requested using client-side JS directly from the browser. Useful for services monitoring change in client and server IPs. Unlimited Requests.
konghq.com — API Marketplace and powerful private and public API tools. With the free tier, some features such as monitoring, alerting, and support, are limited.
Kreya — Free gRPC GUI client to call and test gRPC APIs. Can import gRPC APIs via server reflection.
Lightly — Improve your machine-learning models by using the correct data. Use datasets of up to 1000 samples for free.
LoginLlama - A login security API to detect fraudulent and suspicious logins and notify your customers. Free for 1,000 logins per month.
MailboxValidator — Email verification service using real mail server connection to confirm valid email. The free API plan has 300 verifications per month.
Meteosource Weather API — global weather API for current and forecasted weather data. Forecasts are based on a machine learning combination of more weather models to achieve better accuracy. The free plan comes with 400 calls per day.
microlink.io – It turns any website into data such as metatags normalization, beauty link previews, scraping capabilities, or screenshots as a service. One hundred reqs/day, every day free.
Mindee – Mindee is a powerful OCR software and an API-first platform that helps developers automate applications' workflows by standardizing the document processing layer through data recognition for key information using computer vision and machine learning. The free tier offers 250 pages per month.
monkeylearn.com — Text analysis with machine learning, free 300 queries/month.
MockAPI — MockAPI is a simple tool that lets you quickly mock up APIs, generate custom data, and perform operations using a RESTful interface. MockAPI is meant to be a prototyping/testing/learning tool. One project/4 resources per project for free.
Mockfly — Mockfly is a trusted development tool for API mocking and feature flag management. Quickly generate and control mock APIs with an intuitive interface. The free tier offers 500 requests per day.
Mocki - A tool that lets you create mock GraphQL and REST APIs synced to a GitHub repository. Simple REST APIs are free to develop and use without signup.
Mocko.dev — Proxy your API, choose which endpoints to mock in the cloud and inspect traffic, for free. Speed up your development and integration tests.
Mocky - A simple web app to generate custom HTTP responses for mocking HTTP requests. Also available as open source.
reqres.in - A Free hosted REST-API ready to respond to your AJAX requests.
microenv.com — Create fake REST API for developers with the possibility to generate code and app in a docker container.
neptune.ai - Log, store, display, organize, compare, and query all your MLOps metadata. Free for individuals: 1 member, 100 GB of metadata storage, 200h of monitoring/month
News API — Search news on the web with code, and get JSON results. Developers get 3,000 queries free each month.
Nordigen — Free open banking data API. PSD2. Connect 2300+ banks with your app/software in EU+UK.
Nyckel — Train, deploy, and invoke image and text ML models. Free training with up to 5,000 pieces of training data. 1000 model invokes per month free.
Observable — a place to create, collaborate, and learn with data. Free: Unlimited notebooks, Unlimited publishing, Five editors per notebook.
OCR.Space — An OCR API parses image and pdf files that return the text results in JSON format. Twenty-five thousand requests per month are free.
Duply.co — Create dynamic images from API & URL, design template once and reuse it. The free tier offers 70 images/month creation from API & URL and Up to 100 through Form.
OpenAPI3 Designer — Visually create Open API 3 definitions for free.
Orchest — Visual pipeline editor and workflow orchestrator for data science, one instance for free, open source version available.
parsehub.com — Extract data from dynamic sites, turn dynamic websites into APIs, five projects free.
pdfEndpoint.com - Effortlessly convert HTML or URLs to PDF with a simple API. One hundred conversions per month for free.
PDF Factory - PDF Automation API, visual template editor, dynamic data integration, and PDF rendering with an API. The free plan comes with one template, 100 PDFs/month.
Pixela - Free daystream database service. All operations are performed by API. Visualization with heat maps and line graphs is also possible.
Postbacks - Request HTTP callbacks for a later time. Eight thousand free requests on signup.
Postman — Simplify workflows and create better APIs – faster – with Postman, a collaboration platform for API development. Use the Postman App for free forever. Postman cloud features are also free forever with certain limits.
PrefectCloud — A complete platform for dataflow automation. All plans include 20,000 free runs every month. That's enough to power ETL for most small businesses.
Preset Cloud - A hosted Apache Superset service. Forever free for teams of up to 5 users, featuring unlimited dashboards and charts, a no-code chart builder, and a collaborative SQL editor.
PromptLeo - Prompt engineering platform for creators and developers. It offers a prompt engineering library, forms, and API. The free plan provides one prompt formation, one prompt API endpoint, and 30 generations per month.
PromptLoop - Use AI and large language models like GPT-3 with a simple spreadsheet formula to transform, comprehend, and analyze text in Google Sheets. The first 2,000 credits are free each month.
Crawlbase — Crawl and scrape websites without proxies, infrastructure, or browsers. We solve captchas for you and prevent you from being blocked. The first 1000 calls are free of charge.
Public-Apis Github Repo — A list of free public APIs.
Supportivekoala — Allows you to autogenerate images by your input via templates. The free plan allows you to create up to 100 images per week.
QuickMocker — Manage online fake API endpoints under your own subdomain, forward requests to localhost URL for webhooks development and testing, use RegExp and multiple HTTP methods for URL path, prioritize endpoints, more than 100 shortcodes (dynamic or fake response values) for response templating, import from OpenAPI (Swagger) Specifications in JSON format, proxy requests, restrict endpoint by IP address and authorization header. The free account provides one random subdomain, ten endpoints, 5 RegExp URL paths, 50 shortcodes per endpoint, 100 requests per day, and 50 history records in the requests log.
Rapidapi - World’s Largest API Hub Millions of developers find and connect to thousands of APIs, API Development using fun challenges (with solutions!) and interactive examples.
RequestBin.com — Create a free endpoint to which you can send HTTP requests. Any HTTP requests sent to that endpoint will be recorded with the associated payload and headers so you can observe recommendations from webhooks and other services.
Roboflow - create and deploy a custom computer vision model with no prior machine learning experience required. The free tier includes up to 1,000 free source images.
ROBOHASH - Web service to generate unique and cool images from any text.
SaturnCloud - Data science cloud environment that allows running Jupyter notebooks and Dask clusters. Thirty hours of free computation and 3 hours of Dask per month.
Scraper's Proxy — Simple HTTP proxy API for scraping. Scrape anonymously without having to worry about restrictions, blocks, or captchas. First 100 successful scrapes per month free including javascript rendering (more available if you contact support).
ScrapingAnt — Headless Chrome scraping API and free checked proxies service. Javascript rendering, premium rotating proxies, CAPTCHAs avoiding. Free plans are available.
ScraperBox — Undetectable web scraping API using real Chrome browsers and proxy rotation. Use a simple API call to scrape any web page. The free plan has 1000 requests per month.
ScrapingDog — Scrapingdog handles millions of proxies, browsers, and CAPTCHAs to provide you with the HTML of any web page in a single API call. It also includes Web Scraper for Chrome & Firefox and software for instant scraping demand. Free plans are available.
scrapinghub.com — Data scraping with visual interface and plugins. The free plan includes unlimited scraping on a shared server.
Simplescraper — Trigger your webhook after each operation. The free plan includes 100 cloud scrape credits.
Select Star - is an intelligent data discovery platform that automatically analyzes and documents your data. Free light tier with 1 Data Source, up to 100 Tables and 10 Users.
Sheetson - Instantly turn any Google Sheets into a RESTful API. Free plan available.
Shipyard — Low-code data orchestration platform for the cloud. Build with a mix of low-code templates and your code (Python, Node.js, Bash, SQL). Our free developer plan offers 10 hours of runtime every month for one user - more than enough to automate multiple workflows.
shrtcode API - Free URL Shortening API without authorization and no request limits.
SerpApi - Real-time search engine scraping API. Returns structured JSON results for Google, YouTube, Bing, Baidu, Walmart, and many other machines. The free plan includes 100 successful API calls per month.
Sofodata - Create secure RESTful APIs from CSV files. Upload a CSV file and instantly access the data via its API allowing faster application development. The free plan includes 2 APIs and 2,500 API calls per month. You don't need a credit card.
Stoplight - Saas for collaboratively designing and documenting for APIs. The free plan offers free design, mocking, and documentation tools.
Svix - Webhooks as a Service. Send up to 50,000 messages/month for free.
TemplateTo - Auto-Generate PDF/TXT documents from reusable templates with our drop-and-drop editor and simple API. The free plan comes with 450 PDFs/month and three templates.
TinyMCE - rich text editing API. Core features are free for unlimited usage.
Webhook Store - Tool for storing third-party webhooks and debug them on localhost (ngrok style). Open source and self-hostable. Free personal domain username.github.webhook.store, free public domains anything.webhook.store.
Weights & Biases — The developer-first MLOps platform. Build better models faster with experiment tracking, dataset versioning, and model management. Free tier for personal projects only, with 100 GB of storage included.
wit.ai — NLP for developers.
wolfram.com — Built-in knowledge-based algorithms in the cloud.
wrapapi.com — Turn any website into a parameterized API. 30k API calls per month.
ZenRows — Web Scraping API & proxy server that bypasses any anti-bot solution while offering javascript rendering, rotating proxies, and geotargeting. The free tier of 1000 API calls.
Zenscrape — Web scraping API with headless browsers, residentials IPs, and straightforward pricing. One thousand free API calls/month and extra credits for students and non-profits.
ip-api — IP Geolocation API, Free for non-commercial use, no API key required, limited to 45 req/minute from the same IP address for the free plan.
WebScraping.AI - Simple Web Scraping API with built-in parsing, Chrome rendering, and proxies. Two thousand free API calls per month.
Zipcodebase - Free Zip Code API, access to Worldwide Postal Code Data. Ten thousand free requests/month.
huggingface.co - Build, train, and deploy NLP models for Pytorch, TensorFlow, and JAX. Free up to 30k input characters/mo.
vatcheckapi.com - Simple and free VAT number validation API. Five hundred free requests per month.
numlookupapi.com - Free phone number validation API - 100k free requests / month.
Volca - Free API providing lists of technologies such as programming languages and database systems. Unlimited free requests.
Query.me - Collaborative data notebooks that execute script-like and allow to fetch and send data via SQL, API, and many custom blocks, like Slack and Email. Free for small Teams.
ERD Lab — Free cloud-based entity relationship diagram (ERD) tool made for developers.
What The Diff - AI-powered code review assistant. The free plan has a limit of 25,000 monthly tokens (~10 PRs).
Zipcodestack - Free Zip Code API and Postal Code Validation. Ten thousand free requests/month.
Zuplo - Add API Key authentication, rate limiting, and developer documentation to any API in minutes. The free plan offers up to 10 projects, unlimited production edge environments, 250 API keys, 100K monthly requests, and 1GB egress.
OpenWeb Ninja - Extremely comprehensive real-time SERP and public data APIs: Google Search, Shopping, Jobs, Images, Lens, News, Google Maps Businesses / Places, Reviews, Photos, Website Emails and Social Contacts Scraper, Amazon, Yelp and more. All APIs include a free tier with 100 to 200 free monthly requests.
Tavily AI - API for online serach and rapid insights and comprehensive research, with the capability of organization of research results. 1000 request/month for the Free tier with No credit card required.
Appinvento — AppInvento is a free No code app builder. In the automatically generated backend code, users have complete access to the source code and unlimited APIs and routes, allowing for extensive integration. The free plan includes three projects, five tables, and a Google add-on.
DhiWise — Seamlessly turn Figma designs into dynamic Flutter & React applications with DhiWise's innovative code generation technology, optimizing your workflow and helping you craft exceptional mobile and web experiences faster than ever before.
Codeium — Codeium is a free AI-powered code completion tool. It supports over 20+ programming languages (Python, JavaScript, Java, TypeScript, PHP, C/C++, Go, etc.) and integrates with all significant standalone and web IDEs.
Metalama - Only for C#. Metalama generates the boilerplate of the code on the fly during compilation so that your source code remains clean. It is free for open-source projects, and its commercial-friendly free tier includes three aspects.
tabnine.com — Tabnine helps developers create better software faster by providing insights learned from all the code in the world. Plugin available.
v0.dev — v0 uses AI models to generate code based on simple text prompts. It generates copy-and-paste friendly React code based on shadcn/ui and Tailwind CSS that people can use in their projects. Each generation takes at minimum 30 credits. You start up with 1200 credits, and get 200 free credits every month.
beanstalkapp.com — A complete workflow to write, review, and deploy code), a free account for one user, and one repository with 100 MB of storage
browserling.com — Live interactive cross-browser testing, free only 3 minutes sessions with MS IE 9 under Vista at 1024 x 768 resolution
codacy.com — Automated code reviews for PHP, Python, Ruby, Java, JavaScript, Scala, CSS, and CoffeeScript, free for unlimited public and private repositories
Codeac.io - Automated Infrastructure as Code review tool for DevOps integrates with GitHub, Bitbucket, and GitLab (even self-hosted). In addition to standard languages, it also analyzes Ansible, Terraform, CloudFormation, Kubernetes, and more. (open-source free)
CodeBeat — Automated Code Review Platform available for many languages. Free forever for public repositories with Slack and e-mail integration.
codeclimate.com — Automated code review, free for Open Source and unlimited organisation-owned private repos (up to 4 collaborators). Also free for students and institutions.
codecov.io — Code coverage tool (SaaS), free for Open Source and one free private repo
CodeFactor — Automated Code Review for Git. The free version includes unlimited users, public repositories, and one private repo.
codescene.io - CodeScene prioritizes technical debt based on how the developers work with the code and visualizes organizational factors like team coupling and system mastery. Free for Open Source.
CodSpeed - Automate performance tracking in your CI pipelines. Catch performance regressions before deployment, thanks to precise and consistent metrics. Free forever for Open Source projects.
coveralls.io — Display test coverage reports, free for Open Source
dareboost - 5 free analysis reports for web performance, accessibility, and security each month
deepcode.ai — DeepCode finds bugs, security vulnerabilities, performance and API issues based on AI. DeepCode's speed of analysis allows us to analyze your code in real time and deliver results when you hit the save button in your IDE. Supported languages are Java, C/C++, JavaScript, Python, and TypeScript. Integrations with GitHub, BitBucket, and GitLab. Free for open source and private repos and up to 30 developers.
deepscan.io — Advanced static analysis for automatically finding runtime errors in JavaScript code, free for Open Source
DeepSource - DeepSource continuously analyzes source code changes, finding and fixing issues categorized under security, performance, anti-patterns, bug-risks, documentation, and style. Native integration with GitHub, GitLab, and Bitbucket.
eversql.com — EverSQL - The #1 platform for database optimization. Gain critical insights into your database and SQL queries automatically.
gerrithub.io — Gerrit code review for GitHub repositories for free
gocover.io — Code coverage for any Go package
goreportcard.com — Code Quality for Go projects, free for Open Source
gtmetrix.com — Reports and thorough recommendations to optimize websites
holistic.dev - The #1 static code analyzer for Postgresql optimization. Performance, security, and architect database issues automatic detection service
houndci.com — Comments on GitHub commits about code quality, free for Open Source
Moderne.io — Automatic source code refactoring. Moderne offers framework migrations, code analysis with remediation, and unrivaled code transformation at scale, so developers can spend their time building new things instead of maintaining the old. Free for Open Source.
reviewable.io — Code review for GitHub repositories, free for public or personal repos.
parsers.dev - Abstract syntax tree parsers and intermediate representation compilers as a service
scan.coverity.com — Static code analysis for Java, C/C++, C# and JavaScript, free for Open Source
scrutinizer-ci.com — Continuous inspection platform, free for Open Source
semanticdiff.com — Programming language aware diff for GitHub pull requests and commits, free for public repositories
shields.io — Quality metadata badges for open source projects
sonarcloud.io — Automated source code analysis for Java, JavaScript, C/C++, C#, VB.NET, PHP, Objective-C, Swift, Python, Groovy and even more languages, free for Open Source
SourceLevel — Automated Code Review and Team Analytics. Free for Open Source and organizations up to 5 collaborators.
Viezly - Enhanced code review tool for easier code reading and navigation. Free for Open Source and free for personal usage.
webceo.com — SEO tools but with also code verifications and different types of devices
zoompf.com — Fix the performance of your web sites, detailed analysis
libraries.io — Search and dependency update notifications for 32 different package managers, free for open source
Namae - Search various websites like GitHub, Gitlab, Heroku, Netlify, and many more for the availability of your project name.
searchcode.com — Comprehensive text-based code search, free for Open Source
sourcegraph.com — Java, Go, Python, Node.js, etc., code search/cross-references, free for Open Source
tickgit.com — Surfaces TODO comments (and other markers) to identify areas of code worth returning to for improvement.
CodeKeep - Google Keep for Code Snippets. Organize, Discover, and share code snippets, featuring a powerful code screenshot tool with preset templates and a linking feature.
AccessLint — AccessLint brings automated web accessibility testing into your development workflow. It's free for open source and education purposes.
appcircle.io — Automated mobile CI/CD/CT for iOS and Android with online emulators. 20-minute build timeout (60 minutes for Open Source) with single concurrency for free.
appveyor.com — CD service for Windows, free for Open Source
Argonaut - Deploy apps and infrastructure on your cloud in minutes. Support for custom and third-party app deployments on Kubernetes and Lambda environments. The free tier allows unlimited apps and deployments for 5 domains and 2 users.
bitrise.io — A CI/CD for mobile apps, native or hybrid. With 200 free builds/month 10 min build time and two team members. OSS projects get 45 min build time, +1 concurrency and unlimited team size.
buddy.works — A CI/CD with five free projects and one concurrent run (120 executions/month)
buddybuild.com — Build, deploy, and gather feedback for your iOS and Android apps in one seamless, iterative system
Pipelines: Free developer tier includes unlimited concurrency, up to 3 users, 5k job minutes/month, and 30-day build retention, with more free inclusions for open source projects
Test Analytics — Get more out of your test suites, works with any CI platform. The free developer tier includes 100k test executions/month, with more free inclusions for open-source projects.
bytebase.com — Database CI/CD and DevOps. Free under 20 users and ten database instances
CircleCI — Comprehensive free plan with all features included in a hosted CI/CD service for GitHub, GitLab, and BitBucket repositories. Multiple resource classes, Docker, Windows, Mac OS, ARM executors, local runners, test splitting, Docker Layer Caching, and other advanced CI/CD features. Free for up to 6000 minutes/month execution time, unlimited collaborators, 30 parallel jobs in private projects, and up to 80,000 free build minutes for Open Source projects.
cirrus-ci.org - Free for public GitHub repositories
codefresh.io — Free-for-Life plan: 1 build, one environment, shared servers, unlimited public repos
codemagic.io - Free 500 build minutes/month
codeship.com — 100 private builds/month, five private projects, unlimited for Open Source
deploybot.com — 1 repository with ten deployments, free for Open Source
deployhq.com — 1 project with ten daily deployments (30 build minutes/month)
drone - Drone Cloud enables developers to run Continuous Delivery pipelines across multiple architectures - including x86 and Arm (both 32-bit and 64-bit) - all in one place
LayerCI — CI for full stack projects. One full stack preview environment with 5GB memory & 3 CPUs.
semaphoreci.com — Free for Open Source, 100 private builds per month
Squash Labs — creates a VM for each branch and makes your app available from a unique URL, Unlimited public & private repos, Up to 2 GB VM Sizes.
styleci.io — Public GitHub repositories only
Mergify — workflow automation and merge queue for GitHub — Free for public GitHub repositories
Make — The workflow automation tool lets you connect apps and automate workflows using UI. It supports many apps and the most popular APIs. Free for public GitHub repositories, and free tier with 100 Mb, 1000 Operations, and 15 minutes of minimum interval.
Spacelift - Management platform for Infrastructure as Code. Free plan features: IaC collaboration, Terraform module registry, ChatOps integration, Continuous resource compliance with Open Policy Agent, SSO with SAML 2.0, and access to public worker pools: up to 200 minutes/month
microtica.com - Startup environments with ready-made infrastructure components, deploy apps on AWS for free, and support your production workloads. The free tier includes 1 Environment (on your AWS account), 2 Kubernetes Services, 100 build minutes per month, and 20 monthly deployments.
Applitools.com — Smart visual validation for web, native mobile and desktop apps. Integrates with almost all automation solutions (like Selenium and Karma) and remote runners (Sauce Labs, Browser Stack). free for open source. A free tier for a single user with limited checkpoints per week.
Appetize — Test your Android & iOS apps on this Cloud Based Android Phone / Tablets emulator and iPhone/iPad simulators directly in your browser. The free tier includes one concurrent session with 100 minutes of usage per month. No limit on app size.
Apptim — A mobile testing tool that enables people without performance engineering skills to evaluate an app's performance and user experience (UX). A desktop version using your own device is 100% FREE, with unlimited tests on both iOS and Android.
Bencher - A continuous benchmarking tool suite to catch CI performance regressions. Free for all public projects.
BugBug - Lightweight test automation tool for web applications. It is easy to learn and doesn't require coding. You can run unlimited tests on your own computer for free. You also get cloud monitoring and CI/CD integration for an additional monthly fee.
lambdatest.com — Manual, visual, screenshot, and automated browser testing on selenium and cypress, free for Open Source
browserstack.com — Manual and automated browser testing, free for Open Source
checkbot.io — Browser extension that tests if your website follows 50+ SEO, speed and security best practices. Free tier for smaller websites.
checklyhq.com - Checkly is the API & E2E monitoring platform for the modern stack: programmable, flexible and loving JavaScript. Generous free tier for devs.
crossbrowsertesting.com - Manual, Visual, and Selenium Browser Testing in the cloud - free for Open Source
cypress.io - Fast, easy and reliable testing for anything that runs in a browser. Cypress Test Runner is always free and open-source with no restrictions and limitations. Cypress Dashboard is free for open-source projects for up to 5 users.
Cypress Recorder by Preflight - Create AI-powered Cypress Tests/POM models on your browser. It's open-source, except for the AI part. It's free for five monthly test creations with Self-healing scripts, Email, and Visual testing.
everystep-automation.com — Records and replays all steps made in a web browser and creates scripts, free with fewer options
Gremlin — Gremlin's Chaos Engineering tools allow you to safely and securely inject failure into your systems to find weaknesses before they cause customer-facing issues. Gremlin Free provides access to Shutdown and CPU attacks on up to 5 hosts or containers.
gridlastic.com — Selenium Grid testing with a free plan of up to 4 simultaneous selenium nodes/10 grid starts/4,000 test minutes/month
katalon.com - Provides a testing platform that can help teams of all sizes at different levels of testing maturity, including Katalon Studio, TestOps (+ Visual Testing free), TestCloud, and Katalon Recorder.
Keploy - Keploy is a functional testing toolkit for developers. Recording API calls generates E2E tests for APIs (KTests) and mocks or stubs(KMocks). It is free for Open Source projects.
loadmill.com - Automatically create API and load tests by analyzing network traffic. Simulate up to 50 concurrent users for up to 60 minutes for free monthly.
octomind.dev - Auto-generated, run and maintained Playwright UI tests with AI-assisted test case generation
preflight.com - No-code automated web testing. Record tests on your browser that are resilient to UI changes and run them on Windows machines. Could you integrate with your CI/CD? The free plan includes 50 monthly test runs with video, HTML sessions, and more.
percy.io - Add visual testing to any web app, static site, style guide, or component library. Unlimited team members, Demo app, and unlimited projects, 5,000 snapshots/month.
lost-pixel.com - holistic visual regression testing for your Storybook, Ladle, Histoire stories and Web Apps. Unlimited team members, totally free for open-source, 7,000 snapshots/month.
seotest.me — Free on-page SEO website tester. 10 free website crawls per day. Useful SEO learning resources and recommendations on how to improve the on-page SEO results for any website regardless of technology.
snippets.uilicious.com - It's like CodePen but for cross-browser testing. UI-licious lets you write tests like user stories and offers a free platform - UI-licious Snippets - that allows you to run unlimited tests on Chrome with no sign-up required for up to 3 minutes per test run. Found a bug? You can copy the unique URL to your test to show your devs exactly how to reproduce the bug.
testingbot.com — Selenium Browser and Device Testing, free for Open Source
Testspace.com - A Dashboard for publishing automated test results and a Framework for implementing manual tests as code using GitHub. The service is free for Open Source and accounts for 450 monthly results.
tesults.com — Test results reporting and test case management. Integrates with popular test frameworks. Open Source software developers, individuals, educators, and small teams getting started can request discounted and free offerings beyond basic free projects.
websitepulse.com — Various free network and server tools.
qase.io - Test management system for Dev and QA teams. Manage test cases, compose test runs, perform tests, track defects, and measure impact. The free tier includes all core features, with 500MB available for attachments and up to 3 users.
knapsackpro.com - Speed up your tests with optimal test suite parallelization on any CI provider. Split Ruby, JavaScript tests on parallel CI nodes to save time. Free plan for up to 10 minutes of test files and free unlimited plan for Open Source projects.
webhook.site - Verify webhooks, outbound HTTP requests, or emails with a custom URL. A temporary URL and email address are always free.
webhookbeam.com - Set up webhooks and monitor them via push notifications and emails.
Vaadin — Build scalable UIs in Java or TypeScript, and use the integrated tooling, components, and design system to iterate faster, design better, and simplify the development process. Unlimited Projects with five years of free maintenance.
webhook-test.com - Debug and inspect webhooks and HTTP requests with a unique URL during integration. Completely free, you can create unlimited URLs and receive recommendations.
welltested.ai - Generate unit and integration tests using AI for mobile languages like Flutter within minutes. Free forever for developers.
alienvault.com — Uncovers compromised systems in your network
atomist.com — A quicker and more convenient way to automate various development tasks. Now in beta.
Bridgecrew — Infrastructure as code (IaC) security powered by the open source tool - Checkov. The core Bridgecrew platform is free for up to 50 IaC resources.
cloudsploit.com — Amazon Web Services (AWS) security and compliance auditing and monitoring
Public Cloud Threat Intelligence — High confidence Indicator of Compromise(IOC) targeting public cloud infrastructure, A portion is available on github (https://github.com/unknownhad/AWSAttacks). Full list is available via API
CodeNotary.io — Open Source platform with indelible proof to notarize code, files, directories, or container
crypteron.com — Cloud-first, developer-friendly security platform prevents data breaches in .NET and Java applications
CyberChef — A simple, intuitive web app for analyzing and decoding/encoding data without dealing with complex tools or programming languages. Like a Swiss army knife of cryptography & encryption. All features are free to use, with no limit. Open source if you wish to self-host.
DAS — Styra DAS Free, Full lifecycle policy management to create, deploy and manage Open Policy Agent(OPA) authorization
Datree — Open Source CLI tool to prevent Kubernetes misconfigurations by ensuring that manifests and Helm charts follow best practices as well as your organization’s policies
Dependabot Automated dependency updates for Ruby, JavaScript, Python, PHP, Elixir, Rust, Java (Maven and Gradle), .NET, Go, Elm, Docker, Terraform, Git Submodules, and GitHub Actions.
DJ Checkup — Scan your Django site for security flaws with this free, automated checkup tool. Forked from the Pony Checkup site.
Doppler — Universal Secrets Manager for application secrets and config, with support for syncing to various cloud providers. Free for five users with basic access controls.
Dotenv — Sync your .env files, quickly & securely. Stop sharing your .env files over insecure channels like Slack and email, and never lose an important .env file again. Free for up to 3 teammates.
GitGuardian — Keep secrets out of your source code with automated secrets detection and remediation. Scan your git repos for 350+ types of secrets and sensitive files – Free for individuals and teams of 25 developers or less.
Have I been pwned? — REST API for fetching the information on the breaches.
hostedscan.com — Online vulnerability scanner for web applications, servers, and networks. Ten free scans per month.
Infisical — Open source platform that lets you manage developer secrets across your team and infrastructure: everywhere from local development to staging/production 3rd-party services. Free for up to 5 developers.
Internet.nl — Test for modern Internet Standards like IPv6, DNSSEC, HTTPS, DMARC, STARTTLS and DANE
keychest.net - SSL expiry management and cert purchase with an integrated CT database
letsencrypt.org — Free SSL Certificate Authority with certs trusted by all major browsers
meterian.io - Monitor Java, Javascript, .NET, Scala, Ruby, and NodeJS projects for security vulnerabilities in dependencies. Free for one private project, unlimited projects for open source.
Mozilla Observatory — Find and fix security vulnerabilities in your site.
opswat.com — Security Monitoring of computers, devices, applications, configurations, Free 25 users and 30 days history users.
openapi.security - Free tool to quickly check the security of any OpenAPI / Swagger-based API. You don't need to sign up.
pixee.ai - Automated Product Security Engineer as a free GitHub bot that submits PRs to your Java code base to automatically resolve vulnerabilities. Other languages coming soon!
pyup.io — Monitor Python dependencies for security vulnerabilities and update them automatically. Free for one private project, unlimited projects for open source.
qualys.com — Find web app vulnerabilities, audit for OWASP Risks
report-uri.io — CSP and HPKP violation reporting
ringcaptcha.com — Tools to use the phone number as id, available for free
seclookup.com - Seclookup APIs can enrich domain threat indicators in SIEM, provide comprehensive information on domain names, and improve threat detection & response. Get 50K lookups free here.
snyk.io — Can find and fix known security vulnerabilities in your open-source dependencies. Unlimited tests and remediation for open-source projects. Limited to 200 tests/month for your private projects.
ssllabs.com — Intense analysis of the configuration of any SSL web server
SOOS - Free, unlimited SCA scans for open-source projects. Detect and fix security threats before release. Protect your projects with a simple and effective solution.
StackHawk Automate application scanning throughout your pipeline to find and fix security bugs before they hit production. Unlimited scans and environments for a single app.
Sucuri SiteCheck - Free website security check and malware scanner
Protectumus - Free website security check, site antivirus, and server firewall (WAF) for PHP. Email notifications for registered users in the free tier.
TestTLS.com - Test an SSL/TLS service for secure server configuration, certificates, chains, etc. Not limited to HTTPS.
threatconnect.com — Threat intelligence: It is designed for individual researchers, analysts, and organizations starting to learn about cyber threat intelligence. Free up to 3 Users
tinfoilsecurity.com — Automated vulnerability scanning. The free plan allows weekly XSS scans
Ubiq Security — Encrypt and decrypt data with three lines of code and automatic key management. Free for one application and up to 1,000,000 encryptions per month.
Virgil Security — Tools and services for implementing end-to-end encryption, database protection, IoT security, and more in your digital solution. Free for applications with up to 250 users.
Virushee — Privacy-oriented file/data scanning powered by hybrid heuristic and AI-assisted engine. It is possible to use internal dynamic sandbox analysis. Limited to 50MB per file upload
Escape GraphQL Quickscan - One-click security scan of your GraphQL endpoints. Free, no login required.
HasMySecretLeaked - Search across 20 million exposed secrets in public GitHub repositories, gists, issues,and comments for Free
Aserto - Fine-grained authorization as a service for applications and APIs. Free up to 1000 MAUs and 100 authorizer instances.
asgardeo.io - Seamless Integration of SSO, MFA, passwordless auth and more. Includes SDKs for frontend and backend apps. Free up to 1000 MAUs and five identity providers.
Auth0 — Hosted SSO. Up to 7000 active users and two social identity providers.
Authgear - Bring Passwordless, OTPs, 2FA, SSO to your apps in minutes. All Front-end included. Free up to 5000 MAUs.
Authress — Authentication login and access control, unlimited identity providers for any project. Facebook, Google, Twitter and more. The first 1000 API calls are free.
Authy - Two-factor authentication (2FA) on multiple devices, with backups. Drop-in replacement for Google Authenticator. Free for up to 100 successful authentications.
Clerk — User management, authentication, 2FA/MFA, prebuilt UI components for sign-in, sign-up, user profiles, and more. Free up to 10,000 monthly active users.
Cloud-IAM — Keycloak Identity and Access Management as a Service. Free up to 100 users and one realm.
Corbado — Add passkey-first authentication to new or existing apps. Free for unlimited MAUs.
Descope — Highly customizable AuthN flows, has both a no-code and API/SDK approach, Free 7,500 active users/month, 50 tenants (up to 5 SAML/SSO tenants).
duo.com — Two-factor authentication (2FA) for website or app. Free for ten users, all authentication methods, unlimited, integrations, hardware tokens.
Jumpcloud — Provides directory as a service similar to Azure AD, user management, single sign-on, and RADIUS authentication. Free for up to 10 users.
Kinde - Simple, robust authentication you can integrate with your product in minutes. Everything you need to get started with 7,500 free MAU.
logintc.com — Two-factor authentication (2FA) by push notifications, free for ten users, VPN, Websites, and SSH
MojoAuth - MojoAuth makes it easy to implement Passwordless authentication on your web, mobile, or any application in minutes.
Okta — User management, authentication and authorization. Free for up to 100 monthly active users.
onelogin.com — Identity as a Service (IDaaS), Single Sign-On Identity Provider, Cloud SSO IdP, three company apps, and five personal apps, unlimited users
Ory - AuthN/AuthZ/OAuth2.0/Zero Trust managed security platform. Forever free developer accounts with all security features, unlimited team members, 200 daily active users, and 25k/mo permission checks.
Stytch - Flexible authentication APIs and SDKs with reach-resistant passwords, passwordless login flows, MFA, SSO, and more. Email/SMS sending + failover and fraud protections built-in. Offers 5,000 Monthly Active Users free (B2C) or 1,000 Monthly Active Users and 25 Organizations free (B2B).
SuperTokens - Open source user authentication that natively integrates into your app - enabling you to get started quickly while controlling the user and developer experience. Free for up to 5000 MAUs.
Warrant — Hosted enterprise-grade authorization and access control service for your apps. The free tier includes 1 million monthly API requests and 1,000 authz rules.
ZITADEL Cloud — A turnkey user and access management that works for you and supports multi-tenant (B2B) use cases. Free for up to 25,000 authenticated requests, with all security features (no paywall for OTP, Passwordless, Policies, and so on).
PropelAuth — A Sell to companies of any size immediately with a few lines of code, free up to 200 users and 10k Transactional Emails (with a watermark branding: "Powered by PropelAuth").
Logto - Develop, secure, and manage user identities of your product - for both authentication and authorization. Free for up to 5,000 MAUs with open-source self-hosted option available.
TestApp.io - Your go-to platform for ensuring your mobile apps work as they should. Free plan: one app, analytics, unlimited versions & installs, and feedback collection.
Diawi - Deploy iOS & Android apps directly to devices. Free plan: app uploads, password-protected links, 1-day expiration, ten installations.
InstallOnAir - Distribute iOS & Android apps over the air. Free plan: unlimited uploads, private links, 2-day expiration for guests, 60 days for registered users.
GetUpdraft - Distribute mobile apps for testing. The free plan includes one app project, three app versions, 500 MB storage, and 100 app installations per month.
Appho.st - Mobile app hosting platform. The free plan includes five apps, 50 monthly downloads, and a maximum file size of 100 MB.
More Will Be added Later.
Resources: Information gathered from Free-for.dev.