head to head · open source
fastapi vs pactum
fastapi has 102,402 GitHub stars, 9,903 forks, 78 open issues and last shipped 4 days ago. pactum has 620 stars, 62 forks, 18 open issues and last shipped 1 months ago. fastapi leads on adoption by 16,416% (102,402 vs 620 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 | ★ 102K | ★ 620 |
| License | MIT | MIT |
| Written in | Python | JavaScript |
| Last push | 2026-09-14 | 2026-08-11 |
| Forks | ⑂ 9.9K | ⑂ 62 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick fastapi if
- You weight community size — 102K 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 is an MIT licensed, high performance Python web framework for building APIs with standard Python type hints, aimed at Python developers and teams that need production ready HTTP services with automatic OpenAPI documentation.
read the full fastapi overview →
About pactum
PactumJS is an MIT licensed JavaScript library for REST API testing that automates end to end, integration, contract, and component (service level) tests across every level of the test pyramid, aimed at Node.js developers and QA engineers who want one tool for API verification and API mocking.
read the full pactum overview →
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Frequently asked questions
Is fastapi or pactum more popular?
fastapi has 102,402 GitHub stars and pactum has 620. 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 (102,402 stars) or its MIT licence terms. Choose pactum if its feature set, stack or MIT licence fits better. Both are self-hostable.