Insomnia vs SoapUI / ReadyAPI

From $12 per user/month (Pro; ~17% off billed annually)

Free tier available

Free for small teams; Pro lifts the user cap and adds RBAC, and Enterprise at $45 per user/month adds SSO/SCIM and Kong Konnect integration.

SmartBear publishes no ReadyAPI price; the pricing page is a quote request. ReadyAPI is licensed per module — Test, Performance, Virtualization — and buying all three multiplies the cost, with floating licences for CI costing more than fixed seats.

Essentials is free for up to 3 users, including local and cloud projects, CLI and 1,000 mock requests a month.

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.