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Locust vs Grafana k6: catalog facts
Locust	Grafana k6
Free Free and open source; paid support is available separately from Locust.cloud.	Free The k6 tool itself is free and open source.
Windows, macOS, Linux, Command line	Command line
Test scenarios written as ordinary Python code Distributed runs across multiple machines	Test scenarios written in plain JavaScript Single command-line tool, also usable in Docker
Requires writing Python to define tests Documentation is focused mainly on HTTP testing	Requires writing scripts; no graphical test builder in the tool itself Aimed at developers rather than casual site owners
Downloadable app	Downloadable app
Open source	Open source
License not stated	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.