SoapUI alternatives for API testing

Here are some popular SoapUI alternatives for API testing, grouped by use case:

GUI / desktop tools

• Postman — Most popular all-in-one API client for REST/GraphQL, collections, environments, test scripts, and automation.
• Insomnia — Clean UI, great for REST/GraphQL/gRPC, and good for collaboration.
• Paw (macOS) — Native Mac API client with strong request building and code generation.
• Apache JMeter — Better if you also need performance/load testing, not just functional API tests.

CLI / developer-focused

• cURL + scripts — Lightweight and flexible for quick testing and automation.
• HTTPie — More readable than curl, good for manual API calls.
• Newman — Command-line runner for Postman collections, useful in CI/CD.

Automation / testing frameworks

• Rest Assured (Java) — Strong choice for Java-based API test automation.
• Karate — Very popular for API testing with BDD-style syntax, mocks, and assertions.
• pytest + requests (Python) — Lightweight and flexible for custom API test suites.
• Cypress / Playwright — Can test APIs alongside UI workflows.

Enterprise / platform options

• ReadyAPI (from SmartBear) — The paid, more enterprise-focused successor to SoapUI with richer features.
• Tavern — YAML-based API testing framework, good for readable tests.
• Hoppscotch — Web-based API client, lightweight and open-source.

Quick recommendations

• If you want a SoapUI-like GUI: Postman or Insomnia
• If you want automated test suites: Karate or Rest Assured
• If you want CI-friendly command-line execution: Newman or pytest
• If you need load testing too: JMeter

If you want, I can also give you:

1. a comparison table,
2. the best alternative based on your stack (Java/Python/.NET/etc.), or
3. open-source only options.