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Vegeta vs Grafana k6: catalog facts
Vegeta	Grafana k6
Free Free and open source.	Free The k6 tool itself is free and open source.
Windows, macOS, Linux, Command line	Command line
Constant request rate for predictable load Composable subcommands for attack, report and plot	Test scenarios written in plain JavaScript Single command-line tool, also usable in Docker
Command line only No built-in scripting for complex user flows	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: MIT	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 23, 2026

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