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

The Apache JMeter™ application is open source software, a 100% pure Java application designed to load test functional behavior and measure performance. It was originally designed for testing Web Applications but has since expanded to other test functions.

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.

Loader.io is a free load testing service that allows you to stress test your web-apps & apis with thousands of concurrent connections.

Catch performance regressions in CI with Continuous Benchmarking

Don’t just observe. Take action. The only app monitoring platform built for developers that gets to the root cause for every issue.