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Fortio vs Locust: catalog facts
Fortio	Locust
Free Free to use, with the source code published on GitHub.	Free Free and open source; paid support is available separately from Locust.cloud.
Web, Self-hosted, Command line	Windows, macOS, Linux, Command line
Fixed queries-per-second load for repeatable tests Latency histograms and detailed statistics	Test scenarios written as ordinary Python code Distributed runs across multiple machines
Aimed at developers and operators rather than casual users Measures servers under load, not page rendering speed	Requires writing Python to define tests Documentation is focused mainly on HTTP testing
Downloadable app, Self-hosted	Downloadable app
Closed source	Open source
License not stated	License not stated
No account needed	No account needed
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.