SoapUI is a free and open source cross-platform functional testing tool for SOAP and REST APIs.

Is SoapUI open source?

Yes. SoapUI is open source under a custom licence. Its source code is on GitHub at SmartBear/soapui and is written mainly in Java.

Yes. SoapUI is open source, so the software itself is free to use under the terms of its own licence.

Can I self-host SoapUI?

Yes. SoapUI can be self-hosted on your own server or infrastructure.

What is SoapUI an alternative to?

SoapUI is an open-source alternative to Apidog, Stoplight, ReadyAPI and Leapwork. Other open-source alternatives to Apidog include Insomnia, Hoppscotch and Bruno.

Is SoapUI actively maintained?

The most recent commit to SoapUI was on 8 June 2026, and the latest release is v5.10.0, published on 2 June 2026. The project has 1.7k stars on GitHub.

SoapUI: open-source alternative to Apidog, Stoplight

About SoapUI

SoapUI is a free and open source cross-platform functional testing solution for APIs and web services. It supports REST, SOAP, GraphQL, Apache Kafka, and gRPC protocols. The tool is intended for users who want to begin API testing with the fundamentals.

Key features

Multi-protocol support: REST, SOAP, GraphQL, Apache Kafka, gRPC
Automation features: basic property transfer, custom scripting, CI/CD integrations, data generation, dynamic data sources, assertion groups
Collaboration integrations: Jira, Slack, GitHub, Bitbucket, GitLab
Definition support: WSDL, OpenAPI, AsyncAPI, Apache Avro, Swagger, Protobuf
Basic functional testing and basic performance testing

Built with: Java tools
Tags: api testing; soap; rest; functional testing; open source; cross-platform

SoapUI: questions and answers

What is SoapUI?: SoapUI is a free and open source cross-platform functional testing tool for SOAP and REST APIs.
Is SoapUI open source?: Yes. SoapUI is open source under a custom licence. Its source code is on GitHub at SmartBear/soapui and is written mainly in Java.
Is SoapUI free?: Yes. SoapUI is open source, so the software itself is free to use under the terms of its own licence.
Can I self-host SoapUI?: Yes. SoapUI can be self-hosted on your own server or infrastructure.
What is SoapUI an alternative to?: SoapUI is an open-source alternative to Apidog, Stoplight, ReadyAPI and Leapwork. Other open-source alternatives to Apidog include Insomnia, Hoppscotch and Bruno.
Is SoapUI actively maintained?: The most recent commit to SoapUI was on 8 June 2026, and the latest release is v5.10.0, published on 2 June 2026. The project has 1.7k stars on GitHub.