Compare software

Prism vs Stoplight: catalog facts
Prism	Stoplight
Free Free and open source.	Freemium A free plan is available to get started, with paid plans for larger teams.
Command line	Web
Mock server generated directly from an OpenAPI file Validation proxy catches contract drift	Visual OpenAPI editor that needs little specialised knowledge Mock servers from the API description
Depends on a complete, accurate specification Command-line only	Hosted service that requires an account Focused on teams and organisations rather than individual use
Downloadable app	Web application, 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 24, 2026	Official website Full listing and sources Checked September 23, 2026

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