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Fortio vs Gatling: catalog facts
Fortio	Gatling
Free Free to use, with the source code published on GitHub.	Freemium The Community Edition is free and open source; Enterprise Edition is a paid hosted service…
Web, Self-hosted, Command line	Web, Command line
Fixed queries-per-second load for repeatable tests Latency histograms and detailed statistics	Open-source Community Edition you can run on your own machines Load tests are written as code and can be kept in version control
Aimed at developers and operators rather than casual users Measures servers under load, not page rendering speed	Writing tests as code assumes programming experience Advanced analysis and tracing are only in the paid Enterprise Edition
Downloadable app, Self-hosted	Downloadable app, Hosted service
Closed source	Open source
License not stated	License not stated
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 October 2, 2026	Official website Full listing and sources Checked September 24, 2026

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