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Swagger UI vs Stoplight: catalog facts
Swagger UI	Stoplight
Free The open-source project is available without a license fee.	Freemium A free plan is available to get started, with paid plans for larger teams.
Web, Self-hosted	Web
Turns a specification into documentation people can actually call Embeds into an existing site or serves as plain static files	Visual OpenAPI editor that needs little specialised knowledge Mock servers from the API description
Only as good as the OpenAPI description behind it The try-it-out feature needs CORS configured on the API	Hosted service that requires an account Focused on teams and organisations rather than individual use
Web application, Self-hosted	Web application, Hosted service
Open source	Closed source
License: Apache-2.0	License not stated
Not stated if an account is needed	Account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 23, 2026

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