Katalon vs ReadyAPI
Side-by-side from the Top 11 ranking of The 11 Best API Testing Tools (2026). Last verified July 14, 2026.
The short answer
Katalon ranks higher on Top 11 (#6 vs #10) for Backend engineers, QA automation teams, and platform teams validating REST, GraphQL, gRPC, and SOAP APIs. One platform for API, web, and mobile test automation.
At a glance
| Katalon | ReadyAPI | |
|---|---|---|
| Top 11 rank | #6 / The 11 Best API Testing Tools (2026) | #10 / The 11 Best API Testing Tools (2026) |
| Score (out of 9.4) | 8 | 7.4 |
| Best for | Unified API, web, and mobile QA | Enterprise API testing with support |
| Pricing | $$$ (Free tier, paid from ~$175/user/mo) | $$$$ (Commercial license, quoted annually) |
| HQ | Atlanta, USA | Somerville, USA |
| Founded | 2016 | 2011 |
Methodology and scoring weights live at /methodology. No vendor pays for placement — see about.