Locust is an open-source load testing tool that lets you write tests in plain Python. It supports distributed testing, real-time web UI, and can test any system via custom clients.
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THE FIRST COLLECTIONA complete, serverless and distributed load testing platform for production-grade performance testing of APIs and browser-based workflows.
Karate is an open-source test automation framework that unifies API testing, mocks, performance testing, and UI automation into a single tool.
An open-source Minecraft server load tester that connects swarms of bots and reports real server-impact metrics such as estimated TPS, latency, throughput and kick reasons. Includes CLI, web GUI, control-plane API, debug console and programmable bots. Authorized testing only.
Gatling is an open‑source load‑testing platform that lets you write performance tests as code in Java, JavaScript/TypeScript, Kotlin or Scala. It uses a non‑blocking, asynchronous engine for high scalability, supports HTTP, WebSocket, SSE, JMS, gRPC and MQTT, and integrates with CI/CD pipelines, APM tools and observability platforms.
oha is a tiny HTTP load generator written in Rust that provides a real-time TUI for monitoring web application performance.