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.

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

Hoppscotch is an open-source API development ecosystem that helps you create and test your API requests saving precious time in development.

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

Unifying API testing, API Performance testing, API Mocks and UI testing.

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.