Insomnia vs Katalon
Side-by-side from the Top 11 ranking of The 11 Best API Testing Tools (2026). Last verified July 14, 2026.
The short answer
Insomnia ranks higher on Top 11 (#3 vs #6) for Backend engineers, QA automation teams, and platform teams validating REST, GraphQL, gRPC, and SOAP APIs. A clean, fast client with excellent GraphQL and gRPC handling.
At a glance
| Insomnia | Katalon | |
|---|---|---|
| Top 11 rank | #3 / The 11 Best API Testing Tools (2026) | #6 / The 11 Best API Testing Tools (2026) |
| Score (out of 9.4) | 8.6 | 8 |
| Best for | Fast client with strong GraphQL support | Unified API, web, and mobile QA |
| Pricing | $$ (Free tier, paid ~$12-$25/user/mo) | $$$ (Free tier, paid from ~$175/user/mo) |
| HQ | San Francisco, USA | Atlanta, USA |
| Founded | 2016 | 2016 |
Methodology and scoring weights live at /methodology. No vendor pays for placement — see about.