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Gatling vs Fortio: catalog facts
Gatling	Fortio
Freemium The Community Edition is free and open source; Enterprise Edition is a paid hosted service…	Free Free to use, with the source code published on GitHub.
Web, Command line	Web, Self-hosted, Command line
Open-source Community Edition you can run on your own machines Load tests are written as code and can be kept in version control	Fixed queries-per-second load for repeatable tests Latency histograms and detailed statistics
Writing tests as code assumes programming experience Advanced analysis and tracing are only in the paid Enterprise Edition	Aimed at developers and operators rather than casual users Measures servers under load, not page rendering speed
Downloadable app, Hosted service	Downloadable app, Self-hosted
Open source	Closed source
License not stated	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 2, 2026

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