head to head · open source
fastapi vs microcks
fastapi has 102,402 GitHub stars, 9,903 forks, 78 open issues and last shipped 4 days ago. microcks has 2,044 stars, 367 forks, 58 open issues and last shipped yesterday. fastapi leads on adoption by 4,910% (102,402 vs 2,044 stars). fastapi is written in Python under MIT; microcks is written in Java under Apache-2.0. fastapi has attracted 10% as many forks as stars, microcks 18%. microcks was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (api), so they are genuine substitutes rather than adjacent tools.
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 | microcks | |
|---|---|---|
| GitHub stars | ★ 102K | ★ 2.0K |
| License | MIT | Apache-2.0 |
| Written in | Python | Java |
| Last push | 2026-09-14 | 2026-09-17 |
| Forks | ⑂ 9.9K | ⑂ 367 |
| 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 microcks if
- You want the microcks feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Java
- You evaluated both and microcks 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 microcks
Microcks is an open source, cloud native API mocking and testing tool and a Cloud Native Computing Foundation incubating project. It lives in the developer tools and API development ecosystem, where teams need to exercise service contracts before implementations are ready or before changes are trusted. The project turns existing API and microservice assets, including OpenAPI specs, AsyncAPI specs, gRPC protobuf, GraphQL schema, Postman collections, and SoapUI projects, into live mocks for applications, testers, and integration pipelines.
read the full microcks overview →
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Frequently asked questions
Is fastapi or microcks more popular?
fastapi has 102,402 GitHub stars and microcks has 2,044. fastapi has the larger community by that measure.
Are fastapi and microcks free?
Both are open source. fastapi is licensed under MIT and microcks under Apache-2.0. Neither carries a licence fee.
What is the difference between fastapi and microcks?
fastapi is written in Python and microcks in Java. 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 microcks?
Choose fastapi if you want the larger community (102,402 stars) or its MIT licence terms. Choose microcks if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.