compare
Mockoon vs Slumber
The same facts for both, read from GitHub every night, and the relation a person reviewed.
| Fact | Mockoon | Slumber |
|---|---|---|
| Language | TypeScript | Rust |
| Licence | MIT | MIT |
| Stars | 8.4k | 1.2k |
| Latest | v9.9.0 | v5.3.0 |
| Last push | 2026-10-05 | 2026-09-24 |
| Release cadence | about 45 days between releases | about 16 days between releases |
| Active contributors | 1 commit author on the default branch in the last 90 days | 1 commit author 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.
PartialSlumberA terminal UI client with collections kept in a YAML file.
Mockoon
Mockoon
unsigned The latest release, v9.9.0, carries no signature GitHub could verify.
Loading the security report
Slumber
unsigned The latest release, v5.3.0, carries no signature GitHub could verify.
Loading the security report