Compare software

SoapUI Open SourcePostman
Free

The open source edition is free; the commercial ReadyAPI product is paid.

 Freemium

A free tier covers individual use with limits on collaborators, collection runs and…

Windows, macOS, Linux Windows, macOS, Linux, Web, Browser extension
  • Strong SOAP and WSDL support
  • Functional test suites with custom scripting
  • The most widely used API client, so collections and tutorials for it are everywhere
  • Collections with environments, pre-request and test scripts, and a built-in runner
  • GraphQL, gRPC and CI integrations are reserved for paid ReadyAPI
  • Website heavily promotes the commercial product
  • Built around a cloud workspace, and an account is effectively required
  • Offline and local-only use has become harder over successive versions
Downloadable app Downloadable app, Web application, Browser extension
Open source Closed source
License not stated License not stated
Not stated if an account is needed Account needed
Not stated if it works offline Needs internet

Checked September 23, 2026

Checked September 21, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.