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Grafana k6 vs Tsung: catalog facts
Grafana k6	Tsung
Free The k6 tool itself is free and open source.	Free Free and open source under the GPL-2.0 license.
Command line	Linux, Command line
Test scenarios written in plain JavaScript Single command-line tool, also usable in Docker	Distributed load testing Supports HTTP and several database and messaging protocols
Requires writing scripts; no graphical test builder in the tool itself Aimed at developers rather than casual site owners	Requires Erlang
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL-2.0
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 8, 2026

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