Compare software

Locust vs Fortio: catalog facts
Locust	Fortio
Free Free and open source; paid support is available separately from Locust.cloud.	Free Free to use, with the source code published on GitHub.
Windows, macOS, Linux, Command line	Web, Self-hosted, Command line
Test scenarios written as ordinary Python code Distributed runs across multiple machines	Fixed queries-per-second load for repeatable tests Latency histograms and detailed statistics
Requires writing Python to define tests Documentation is focused mainly on HTTP testing	Aimed at developers and operators rather than casual users Measures servers under load, not page rendering speed
Downloadable app	Downloadable app, Self-hosted
Open source	Closed source
License not stated	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 2, 2026

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