Overview of SoapUI capabilities

SoapUI is a free, cross-platform application for testing web APIs. It was created to validate both SOAP (Simple Object Access Protocol) and REST (Representational State Transfer) services and provides a suite of tools to execute many kinds of API tests. As an open-source project, it was among the earliest API testing utilities available and has evolved through contributions from its developer community into the mature product used today.

Supported operating systems

  • Linux distributions
  • macOS desktop environments
  • Microsoft Windows

Protocols it works with

  • RESTful APIs (Representational State Transfer)
  • SOAP-based web services (Simple Object Access Protocol)

Testing capabilities and features

  • Service mocking to simulate endpoints and responses
  • Security assessments to check for vulnerabilities
  • Load and performance testing to measure behavior under stress
  • Functional verification to confirm API behavior matches expectations

Community, adoption, and history

Being open source, SoapUI benefitted from community-driven development and early adoption, which helped it gain widespread use. Millions of users worldwide rely on it, making it one of the more commonly adopted API testing solutions available.

Alternatives worth considering

If you want to try a different, free option, Yarn is often suggested as an alternative.

Technical

Title
SoapUI
Requirements
  • Windows
Language
No language has been specified.
Available languages
License
  • Free
Latest update
2025-11-05
Author
Smart Bear, LLC
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