head to head · open source
fastapi vs pactum
fastapi has 104,566 GitHub stars, 10,179 forks, 78 open issues and last shipped yesterday. pactum has 621 stars, 62 forks, 18 open issues and last shipped 3 months ago. fastapi leads on adoption by 16,738% (104,566 vs 621 stars). fastapi is written in Python under MIT; pactum is written in JavaScript under MIT. fastapi has attracted 10% as many forks as stars, pactum 10%. fastapi was the more recently maintained of the two, and both are self-hostable with no licence fee.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| fastapi | pactum | |
|---|---|---|
| GitHub stars | ★ 105K | ★ 621 |
| License | MIT | MIT |
| Written in | Python | JavaScript |
| Last push | 2026-11-02 | 2026-08-11 |
| Forks | ⑂ 10K | ⑂ 62 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick fastapi if
- You weight community size — 105K stars and counting
- You want the MIT license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick pactum if
- You want the pactum feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches JavaScript
- You evaluated both and pactum fits your workflow better
About fastapi
FastAPI framework, high performance, easy to learn, fast to code, ready for production Documentation : Source Code : FastAPI is a modern, fast (high performance), web framework for building APIs with Python based on standard Python type hints. The key features are: Fast : Very high performance, on par with NodeJS and Go (thanks to Starlette and Pydantic). One of the fastest Python frameworks available. Fast to code : Increase the speed to develop features by about 200% to 300%. Fewer bugs : Reduce about 40% of human (developer) induced errors. Intuitive : Great editor support. Completion everywhere. Less time…
read the full fastapi overview →
About pactum
PactumJS REST API Testing Tool for all levels in a Test Pyramid PactumJS is a REST API Testing Tool used to automate e2e, integration, contract & component ( or service level ) tests. ⚡ Swift 🎈 Lightweight 🚀 Simple & Powerful 🛠️ Compelling Mock Server 💎 Elegant Data Management 🔧 Extendable & Customizable 📚 Clear & Comprehensive Testing Style 🔗 Component, Contract & E2E testing of APIs Documentation This readme offers an basic introduction to the library. Head over to the full documentation at API Testing Integration Testing Component Testing Contract Testing E2E Testing Mock Server Need Help We use Github…
read the full pactum overview →
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Frequently asked questions
Is fastapi or pactum more popular?
fastapi has 104,566 GitHub stars and pactum has 621. fastapi has the larger community by that measure.
Are fastapi and pactum free?
Both are open source. fastapi is licensed under MIT and pactum under MIT. Neither carries a licence fee.
What is the difference between fastapi and pactum?
fastapi is written in Python and pactum in JavaScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, fastapi or pactum?
Choose fastapi if you want the larger community (104,566 stars) or its MIT licence terms. Choose pactum if its feature set, stack or MIT licence fits better. Both are self-hostable.