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

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