Head to head
Heystack vs Mockserver
Same numbers we show everywhere else, lined up. Ratings come from users, the grade comes from our scanner, adoption comes from public registries.
No reviews yet
Observability for AI apps: investigate traces, logs, LLM usage, replays and crashes; manage alerts.
Full listing
No reviews yet
Mock, record/replay, verify and chaos-test any HTTP, REST, gRPC or LLM dependency over MCP.
Full listingThe short version
Neither has been reviewed yet, so the comparison rests on the scan and the public usage numbers. Both score close on the safety scan (93 and 93 out of 100). Heystack is hosted and callable through the gateway; Mockserver runs on your own machine. Mockserver has noticeably more public adoption.
| Heystack | Mockserver | |
|---|---|---|
| User rating | No reviews yet | No reviews yet |
| Safety grade | A93/100 | A93/100 |
| Adoption | Growing | Established |
| GitHub stars | 0 | 5.0k |
| Downloads / week | – | – |
| Runs where | Hosted (remote) | Your machine (local) |
| Gateway-ready | Yes | No |
| Tools | — | — |
| Write actions | — | — |
| Price per call | Free | Free |
| Licence | — | Apache-2.0 |
| Last release | 2026-09-19 | 2026-09-19 |
| Category | AI and agents | AI and agents |