SoapUI / ReadyAPI vs Insomnia

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

From $12 per user/month (indicative)

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

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

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

Free plan for individuals with local storage.

Widely used

SmartBear · since 2005

Widely used

Kong · since 2016

• 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.

• 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.

• 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.

• 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.

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

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