SoapUI / ReadyAPI vs Karate

From $829 per year (indicative, ReadyAPI Test module)

Free tier available

ReadyAPI is licensed per module — Test, Performance, Virtualization — and buying all three multiplies the cost.

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

SoapUI open source is free and covers SOAP and REST functional testing.

The open-source framework is complete and free.

Widely used

SmartBear · since 2005

Widely used

Karate Labs · since 2017

• Unmatched SOAP, WSDL and JMS support for legacy enterprise integration work.
• ReadyAPI bundles functional, security, load and virtualisation in one product family.
• Groovy scripting escape hatch for anything the GUI cannot express.

• 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.

• Dated Java desktop UI that feels heavy next to modern clients.
• Project files are XML and merge badly in version control.
• Modular licensing gets expensive fast.

• 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.

Enterprises testing SOAP services, message queues and legacy integration layers.

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