Karate vs Postman

Free tier available

From $14 per user/month (Basic, billed annually)

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

Free tier is generous for individuals. Costs come from collaborator seats and monitoring/mock-call volume, and enterprise plans jump sharply.

The open-source framework is complete and free.

Free plan for individuals and small teams with limited collection runs, mock calls and monitors.

Widely used

Karate Labs · since 2017

Category standard

Postman, Inc. · since 2012

• 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.

• Near-universal adoption — collections are a lingua franca between teams and vendors.
• Covers design, mocking, testing, documentation and monitoring in one place.
• Newman makes any collection runnable in CI without rewriting it.

• 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.

• Cloud-first sync raised real concerns for teams handling sensitive API credentials; the offline story has been repeatedly reduced.
• Collections stored in the vendor cloud rather than your repo make code review and branching awkward.
• The desktop app has grown heavy, and per-seat costs add up on large teams.

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

Teams that want one tool covering the whole API lifecycle and value ecosystem ubiquity.