Gatling is a powerful open-source load testing solution that integrates with your development pipeline. It includes a web recorder and colorful reports.

Skyramp uses deterministic, local-first AI to generate functional & performance tests — with native support for your frameworks, infra-aware execution, and seamless pipeline integration.

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

Anyone on your team can load test with instant playback, an easy-to-use interface, and real browsers for reliable data.

Test the Performance of Your Website Under Load

Locust is an open source performance/load testing tool for HTTP and other protocols. Its developer-friendly approach lets you define your tests in regular Python code. Locust tests can be run from command line or using its web-based UI