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Grafana k6 vs Vegeta: catalog facts
Grafana k6	Vegeta
Free The k6 tool itself is free and open source.	Free Free and open source.
Command line	Windows, macOS, Linux, Command line
Test scenarios written in plain JavaScript Single command-line tool, also usable in Docker	Constant request rate for predictable load Composable subcommands for attack, report and plot
Requires writing scripts; no graphical test builder in the tool itself Aimed at developers rather than casual site owners	Command line only No built-in scripting for complex user flows
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: MIT
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 24, 2026

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