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Gatling vs Siege: catalog facts
Gatling	Siege
Freemium The Community Edition is free and open source; Enterprise Edition is a paid hosted service…	Free Free and open source.
Web, Command line	macOS, Linux, 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	Tests many URLs at once from a list Configurable number of simulated users
Writing tests as code assumes programming experience Advanced analysis and tracing are only in the paid Enterprise Edition	Command line only, with no graphical reports Scripting options are simpler than in newer load testers
Downloadable app, Hosted service	Downloadable app
Open source	Open source
License not stated	License: GPL-3.0
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 September 24, 2026

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