head to head · open source
fastapi vs wiremock
fastapi has 102,402 GitHub stars, 9,903 forks, 78 open issues and last shipped 4 days ago. wiremock has 7,374 stars, 1,518 forks, 503 open issues and last shipped 3 days ago. fastapi leads on adoption by 1,289% (102,402 vs 7,374 stars). fastapi is written in Python under MIT; wiremock is written in Java under Apache-2.0. fastapi has attracted 10% as many forks as stars, wiremock 21%. wiremock was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (json), 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.
← all 8884 open source comparisons
Side by side
| fastapi | wiremock | |
|---|---|---|
| GitHub stars | ★ 102K | ★ 7.4K |
| License | MIT | Apache-2.0 |
| Written in | Python | Java |
| Last push | 2026-09-14 | 2026-09-15 |
| Forks | ⑂ 9.9K | ⑂ 1.5K |
| 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 wiremock if
- You want the wiremock 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 wiremock 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 wiremock
WireMock is an open source tool for mocking HTTP services, started in 2011 as a Java library by Tom Akehurst and now spanning multiple programming languages and technology stacks. It lives in the Java ecosystem, is licensed under Apache 2.0, and is published at wiremock.org. The project can run as a library or client wrapper in many languages, or as a standalone server, and it supports several approaches for creating mock APIs: in code, via its REST API, as JSON files, and by recording HTTP traffic proxied to another destination.
read the full wiremock overview →
More in Developer Tools
Related comparisons
More API Development & Testing projects
Compare either of these against the rest of the API Development & Testing field.
Frequently asked questions
Is fastapi or wiremock more popular?
fastapi has 102,402 GitHub stars and wiremock has 7,374. fastapi has the larger community by that measure.
Are fastapi and wiremock free?
Both are open source. fastapi is licensed under MIT and wiremock under Apache-2.0. Neither carries a licence fee.
What is the difference between fastapi and wiremock?
fastapi is written in Python and wiremock 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 wiremock?
Choose fastapi if you want the larger community (102,402 stars) or its MIT licence terms. Choose wiremock if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.