WebSocket load testing tools

WebSocket load tests stress long-lived connections, fan-out messaging, and reconnect behavior. Classic HTTP flood tools are not enough when your product keeps sockets open for minutes or hours.

This landing lists catalog tools that declare WebSocket among supported protocols. Compare whether each is a cloud SaaS, self-hosted engine, or micro-benchmark CLI, and whether scripting is code-first or GUI-led.

Design scenarios that mix connection churn with message rates. Watch server file descriptors, proxy idle timeouts, and sticky sessions. Pair protocol tests with browser-level checks if clients are web apps that also open sockets from real browsers.

Shortlist two tools, run the same connection budget on both, and compare error rates and p95 message latency before you standardize.