head to head · open source
Insomnia vs mockttp
Insomnia has 40,111 GitHub stars, 2,388 forks, 874 open issues and last shipped yesterday. mockttp has 888 stars, 117 forks, 40 open issues and last shipped 5 days ago. Insomnia leads on adoption by 4,417% (40,111 vs 888 stars). Insomnia is written in TypeScript under Apache-2.0; mockttp is written in TypeScript under Apache-2.0. Insomnia has attracted 6% as many forks as stars, mockttp 13%. Insomnia 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
| Insomnia | mockttp | |
|---|---|---|
| GitHub stars | ★ 40K | ★ 888 |
| License | Apache-2.0 | Apache-2.0 |
| Written in | TypeScript | TypeScript |
| Last push | 2026-11-02 | 2026-10-29 |
| Forks | ⑂ 2.4K | ⑂ 117 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Insomnia if
- You weight community size — 40K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick mockttp if
- You want the mockttp feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches TypeScript
- You evaluated both and mockttp fits your workflow better
About Insomnia
Insomnia API Client Insomnia is an open source, cross platform API client for GraphQL, REST, WebSockets, Server Sent Events (SSE), gRPC and any other HTTP compatible protocol. With Insomnia you can: Debug APIs using the most popular protocols and formats. Design APIs using the native OpenAPI editor and visual preview. Test APIs using native test suites and collection runner. Mock APIs using a cloud or self hosted mocking server. Build CI/CD pipelines using the native Insomnia CLI for linting and testing. Collaborate with others using the many collaboration features. And more including the ability to use 3rd…
read the full Insomnia overview →
About mockttp
Mockttp Part of HTTP Toolkit: powerful tools for building, testing & debugging HTTP(S) Mockttp lets you intercept, transform or test HTTP requests & responses in JavaScript quickly, reliably & anywhere. You can use Mockttp for integration testing, by intercepting real requests as part of your test suite, or you can use Mockttp to build custom HTTP proxies that capture, inspect and/or rewrite HTTP in any other kind of way you like. HTTP testing is the most common and well supported use case. There's a lot of tools to test HTTP, but typically by stubbing the HTTP functions in process at the JS level. That ties you…
read the full mockttp overview →
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Frequently asked questions
Is Insomnia or mockttp more popular?
Insomnia has 40,111 GitHub stars and mockttp has 888. Insomnia has the larger community by that measure.
Are Insomnia and mockttp free?
Both are open source. Insomnia is licensed under Apache-2.0 and mockttp under Apache-2.0. Neither carries a licence fee.
What is the difference between Insomnia and mockttp?
Insomnia is written in TypeScript and mockttp in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Insomnia or mockttp?
Choose Insomnia if you want the larger community (40,111 stars) or its Apache-2.0 licence terms. Choose mockttp if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.