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Tsung vs Locust: catalog facts
Tsung	Locust
Best for: Developers testing the capacity of network services	Best for: Python developers load testing web services
Free Free and open source under the GPL-2.0 license.	Free Free and open source; paid support is available separately from Locust.cloud.
Linux, Command line	Windows, macOS, Linux, Command line
Distributed load testing Supports HTTP and several database and messaging protocols All 3 strengths for Tsung Distributed load testing Supports HTTP and several database and messaging protocols Includes a user manual and examples	Test scenarios written as ordinary Python code Distributed runs across multiple machines All 3 strengths for Locust Test scenarios written as ordinary Python code Distributed runs across multiple machines Used for large-scale HTTP services
Requires Erlang	Requires writing Python to define tests Documentation is focused mainly on HTTP testing
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Offline features available
Official website Full listing and sources Sources for Tsung github.com/processone/tsung Catalog checked October 8, 2026	Official website Full listing and sources Sources for Locust locust.io Catalog checked September 23, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.