Built for developers and testers alike, SoapUI is the only open source tool that covers the entire testing spectrum (functional, security, load, mocking).

Performance testing with Flood increases customer satisfaction and confidence in your production apps and reduces business risk.

Simplifies performance and load testing so that application delivery teams can take a standardized approach to ensure continuous performance, reliability, and scalability from development to production.

k6 Open Source is designed for load testing. Extensible to support other types of testing.

Orderly Ape is an open source (MIT) tool to run distributed and scalable k6 load tests on your own infrastructure using k6, kubernetes, grafana and influxdb.

WebLOAD – Performance and Load Testing for the Most Challenging Web Applications