SoapUI

SoapUI is ranked #7 of 38 in API clients on The Geeks Club. It runs on Linux, macOS, Self-hosted, Windows. There is a free plan.

SoapUI plans and pricing

All plans

SoapUI Open Source Not published REST, SOAP, and GraphQL API testing · Functional and regression testing · API mocking · Command-line automation soapui.org · 21 Sept 2026

SoapUI Open Source Free Open source version; functional and basic performance testing; REST, SOAP, and GraphQL listed on download page soapui.org · 3 Oct 2026

Compared on API clients

Free plan: Yes
GraphQL support: Yes

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SoapUI

Purpose: SoapUI is an open source API testing tool for testing REST, SOAP, and GraphQL web services.
Functional testing: The product supports drag-and-drop creation of functional and regression tests, assertions, and data-driven tests.
Mocking: SoapUI can create service mocks from WSDL and supports mocking SOAP and REST APIs.
Load testing: The feature page describes load testing as an extension of functional tests and says tests can run from command-line tools.
Protocols: The product page lists SOAP/WSDL, REST, GraphQL, and JMS protocol support.
Automation integrations: The open source feature page names Maven, Hudson, Bamboo, JUnit, and Ant integrations and says SoapUI can run from other CI tools.
Security testing scope: The download page presents security testing among the expanded capabilities associated with ReadyAPI, while SoapUI Open Source is listed for basic functional and performance testing.
WS-Security: SoapUI can configure outgoing and incoming WS-Security, including encryption, signatures, SAML, keystores, and truststores.
Supported platforms: SoapUI is described as cross-platform for Windows, Mac, and Linux/Unix.
Who it is for: SmartBear describes SoapUI as a starting point for API testing for developers and testers.
Support resources: The SoapUI site links to SmartBear Support and a community forum.
Maker and founding: SmartBear says it was started by Jason Cohen in 2003 and lists its global headquarters at 450 Artisan Way, Somerville, Massachusetts.
Price from: Free

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Where it ranks on The Geeks Club

Best API Clients in 2026#7 of 38
Best API Testing Tools in 2026#11 of 35
Best Integration Testing Tools in 2026#11 of 26

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Sources

soapui.org/tools/soapui/· checked 3 Oct 2026
soapui.org/docs/open-source/features/· checked 3 Oct 2026
soapui.org/downloads/soapui/· checked 3 Oct 2026
soapui.org/docs/getting-started/projects/ws-securi· checked 3 Oct 2026
soapui.org/docs/getting-started/installing-soapui/· checked 3 Oct 2026
soapui.org· checked 3 Oct 2026
smartbear.com/company/· checked 3 Oct 2026