Karate vs Insomnia

Free tier available

From $12 per user/month (indicative)

Open source core; Karate Labs sells a commercial IDE and enterprise support separately.

Free for solo use; paid tiers add collaboration, cloud sync and enterprise controls.

The open-source framework is complete and free.

Free plan for individuals with local storage.

Widely used

Karate Labs · since 2017

Widely used

Kong · since 2016

• One DSL covers functional API tests, mocks and load tests — rare consolidation.
• Powerful JSON matching that removes most assertion boilerplate.
• Non-Java testers can write meaningful tests.

• Noticeably faster and lighter than Postman for everyday request work.
• Best-in-class GraphQL and gRPC ergonomics.
• Design-first OpenAPI workflow with linting built in.

• The custom DSL is another language to learn and cannot be refactored by an IDE.
• Debugging complex scenarios is harder than in plain code.
• The UI automation feature is far behind dedicated browser tools.

• A forced-account change in 2023 damaged trust; check the current model before standardising on it.
• Test scripting is less capable than Postman's.
• Smaller ecosystem of shared collections.

Teams wanting API testing and mocking in one tool, including non-Java testers.

Developers who mainly want a fast client with excellent GraphQL support.