GitHub Open Source Insight
Computed at Sep 10, 2026GitHub repo leaderboard by stars, growth rate and activity.
microsoft
Playwright is a framework for Web Testing and Automation. It allows testing Chromium, Firefox and WebKit with a single API.
TypeScript95,834 starslast pushed 2 days agopuppeteer
JavaScript API for Chrome and Firefox
TypeScript95,561 starslast pushed 2 days agostorybookjs
Storybook is the industry standard workshop for building, documenting, and testing UI components in isolation
TypeScript91,024 starslast pushed 2 days agohoppscotch
Open-Source API Development Ecosystem • https://hoppscotch.io • Offline, On-Prem & Cloud • Web, Desktop & CLI • Open-Source Alternative to Postman, Insomnia
TypeScript80,252 starslast pushed 2 days agolocalstack
💻 A fully functional local AWS cloud stack. Develop and test your cloud & Serverless apps offline
Python65,122 starslast pushed 6 months agousebruno
Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia)
JavaScript46,841 starslast pushed 2 days agojestjs
stretchr
A toolkit with common assertions and mocks that plays nicely with the standard library
Go26,203 starslast pushed 1 week agopromptfoo
Test your prompts, agents, and RAGs. Red teaming/pentesting/vulnerability scanning for AI. Compare performance of GPT, Claude, Gemini, DeepSeek, and more. Simple declarative configs with command line and CI/CD integration. Used by OpenAI and Anthropic.
TypeScript24,947 starslast pushed 2 days agogoldbergyoni
📗🌐 🚢 Comprehensive and exhaustive JavaScript & Node.js testing best practices (August 2025)
JavaScript24,626 starslast pushed 2 years ago
| # | Repo | Language | Stars | 30-day trend | Last updated |
|---|---|---|---|---|---|
| 1 | microsoft Playwright is a framework for Web Testing and Automation. It allows testing Chromium, Firefox and WebKit with a single API. | TypeScript | 95,834 | — | last pushed 2 days ago |
| 2 | puppeteer JavaScript API for Chrome and Firefox | TypeScript | 95,561 | — | last pushed 2 days ago |
| 3 | storybookjs Storybook is the industry standard workshop for building, documenting, and testing UI components in isolation | TypeScript | 91,024 | — | last pushed 2 days ago |
| 4 | hoppscotch Open-Source API Development Ecosystem • https://hoppscotch.io • Offline, On-Prem & Cloud • Web, Desktop & CLI • Open-Source Alternative to Postman, Insomnia | TypeScript | 80,252 | — | last pushed 2 days ago |
| 5 | localstack 💻 A fully functional local AWS cloud stack. Develop and test your cloud & Serverless apps offline | Python | 65,122 | — | last pushed 6 months ago |
| 6 | usebruno Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia) | JavaScript | 46,841 | — | last pushed 2 days ago |
| 7 | jestjs Delightful JavaScript Testing. | TypeScript | 45,469 | — | last pushed 3 days ago |
| 8 | stretchr A toolkit with common assertions and mocks that plays nicely with the standard library | Go | 26,203 | — | last pushed 1 week ago |
| 9 | promptfoo Test your prompts, agents, and RAGs. Red teaming/pentesting/vulnerability scanning for AI. Compare performance of GPT, Claude, Gemini, DeepSeek, and more. Simple declarative configs with command line and CI/CD integration. Used by OpenAI and Anthropic. | TypeScript | 24,947 | — | last pushed 2 days ago |
| 10 | goldbergyoni 📗🌐 🚢 Comprehensive and exhaustive JavaScript & Node.js testing best practices (August 2025) | JavaScript | 24,626 | — | last pushed 2 years ago |
All · 11,474