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Plow vs Grafana k6: catalog facts
Plow	Grafana k6
Free Free and open source under the Apache 2.0 licence.	Free The k6 tool itself is free and open source.
Windows, Command line	Command line
Real-time metrics in both terminal and browser Uses fasthttp for high request rates	Test scenarios written in plain JavaScript Single command-line tool, also usable in Docker
Tests HTTP endpoints only Should only be pointed at servers you are allowed to load test	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: Apache-2.0	License not stated
No account needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 23, 2026

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