Insomnia vs SoapUI / ReadyAPI

From $12 per user/month (indicative)

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

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

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

Free plan for individuals with local storage.

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

Widely used

Kong · since 2016

Widely used

SmartBear · since 2005

• 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.

• 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.

• 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.

• 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.

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

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