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Locust vs Loader.io: catalog facts
Locust	Loader.io
Free Free and open source; paid support is available separately from Locust.cloud.	Freemium Free load testing service with paid plans listed on its pricing page.
Windows, macOS, Linux, Command line	Web
Test scenarios written as ordinary Python code Distributed runs across multiple machines	No load generation infrastructure to run yourself Real-time monitoring of each test
Requires writing Python to define tests Documentation is focused mainly on HTTP testing	Requires an account and registering your target host Closed source hosted service
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 September 24, 2026

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