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Grafana k6 vs Locust: catalog facts
Grafana k6	Locust
Free The k6 tool itself is free and open source.	Free Free and open source; paid support is available separately from Locust.cloud.
Command line	Windows, macOS, Linux, Command line
Test scenarios written in plain JavaScript Single command-line tool, also usable in Docker	Test scenarios written as ordinary Python code Distributed runs across multiple machines
Requires writing scripts; no graphical test builder in the tool itself Aimed at developers rather than casual site owners	Requires writing Python to define tests Documentation is focused mainly on HTTP testing
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.