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Locust vs Tsung: catalog facts
Locust	Tsung
Free Free and open source; paid support is available separately from Locust.cloud.	Free Free and open source under the GPL-2.0 license.
Windows, macOS, Linux, Command line	Linux, Command line
Test scenarios written as ordinary Python code Distributed runs across multiple machines	Distributed load testing Supports HTTP and several database and messaging protocols
Requires writing Python to define tests Documentation is focused mainly on HTTP testing	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.