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Locust vs Loadster: catalog facts
Locust	Loadster
Free Free and open source; paid support is available separately from Locust.cloud.	Freemium Free to start testing, with paid plans for larger tests.
Windows, macOS, Linux, Command line	Web
Test scenarios written as ordinary Python code Distributed runs across multiple machines	Choice of real browsers, HTTP bots or Playwright scripts Runs from 32 cloud regions
Requires writing Python to define tests Documentation is focused mainly on HTTP testing	Cloud service only, not self-hostable Large tests require a paid plan
Downloadable app	Hosted service
Open source	Closed source
License not stated	License not stated
No account needed	Account needed
Works offline	Needs internet
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.