compare
Mockoon vs Yaak
The same facts for both, read from GitHub every night, and the relation a person reviewed.
| Fact | Mockoon | Yaak |
|---|---|---|
| Language | TypeScript | TypeScript |
| Licence | MIT | MIT |
| Stars | 8.4k | 19k |
| Latest | v9.9.0 | v2026.8.1 |
| Last push | 2026-10-05 | 2026-10-06 |
| Release cadence | about 45 days between releases | too few releases |
| Active contributors | 1 commit author on the default branch in the last 90 days | 12 commit authors on the default branch in the last 90 days |
| Flags | none | none |
How they relate
Both replace Postman. Alternatives to Postman →
PartialMockoonMock APIs only, run locally or in CI without an account.
Full replacementYaakREST, GraphQL, gRPC and WebSocket requests in a desktop app, with no account needed.
Mockoon
Yaak
- v2026.9.0-beta.32026-09-26Release 2026.9.0-beta.3pre-release
- v2026.9.0-beta.22026-09-25Release 2026.9.0-beta.2pre-release
- v2026.9.0-beta.12026-09-24Release 2026.9.0-beta.1pre-release
- v2026.8.12026-09-23Release 2026.8.1
- v2026.8.02026-09-17Release 2026.8.0
Mockoon
unsigned The latest release, v9.9.0, carries no signature GitHub could verify.
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Yaak
✓ signed The latest release, v2026.8.1, carries a signature GitHub verified.
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