Open source testing projects
Every project in the registry tagged testing, ranked by real GitHub adoption.
Playwright is a framework for Web Testing and Automation. It allows testing Chromium, Firefox and WebKit with a single API.
JavaScript API for Chrome and Firefox
Delightful JavaScript Testing.
☕️ Classic, reliable, trusted test framework for Node.js and the browser
Hurl, run and test HTTP requests with plain text.
Sandbox for developing and testing UI components in isolation
Terratest is a Go library that makes it easier to write automated tests for your infrastructure code.
Golang gRPC Middlewares: interceptor chaining, auth, logging, retries and more.
A payment application to demonstrate real-world usage of Cypress testing methods, patterns, and workflows.
Catch API bugs before your users do
:lock: Memorable site for testing clients against bad SSL configs.
Software build automation tool for Python.
Generate automated tests for your Node.js app via LLMs without developers having to write a single line of code.
Litter is a pretty printer library for Go data structures to aid in debugging and testing.
Selects tests affected by changed files. Executes the right tests first. Continuous test runner when used with pytest-watch.
Powerful friendly HTTP mock server & proxy library
A simple and extensible behavioural testing library for Go. You can use api test to simplify REST API, HTTP handler and e2e tests.
:boom: Test REST, GraphQL APIs
Visual regression testing for seamless UI development
Lightweight Java agent for traffic capture and replay, enhancing testing and debugging.
Related tags
Frequently asked questions
How many open source testing projects are there?
This registry tracks 21 projects tagged testing, with 348,199 GitHub stars between them. The most-adopted is playwright at 99,121 stars.
Are these testing projects free to use?
Yes — 21 of the 21 carry an explicit open-source licence across 2 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which testing project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these testing projects still maintained?
17 of the 21 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.