k6

k6 is a modern load-testing tool, built on our years of experience in the performance and testing industries. It's built to be powerful, extensible, and full-featured. The key design goal is to provide the best developer experience.

Its core features are:

• Configurable load generation. Even lower-end machines can simulate lots of traffic.
• Tests as code. Reuse scripts, modularize logic, version control, and integrate tests with your CI.
• A full-featured API. The scripting API is packed with features that help you simulate real application traffic.
• An embedded JavaScript engine. The performance of Go, the scripting familiarity of JavaScript.
• Multiple Protocol support. HTTP, WebSockets, gRPC, and more.
• Large extension ecosystem. You can extend k6 to support your needs. And many people have already shared their extensions with the community!
• Flexible metrics storage and visualization. Summary statistics or granular metrics, exported to the service of your choice.

This is what load testing looks like in the 21st century.