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Postman vs Stoplight: catalog facts
Postman	Stoplight
Freemium A free tier covers individual use with limits on collaborators, collection runs and…	Freemium A free plan is available to get started, with paid plans for larger teams.
Windows, macOS, Linux, Web, Browser extension	Web
The most widely used API client, so collections and tutorials for it are everywhere Collections with environments, pre-request and test scripts, and a built-in runner	Visual OpenAPI editor that needs little specialised knowledge Mock servers from the API description
Built around a cloud workspace, and an account is effectively required Offline and local-only use has become harder over successive versions	Hosted service that requires an account Focused on teams and organisations rather than individual use
Downloadable app, Web application, Browser extension	Web application, Hosted service
Closed source	Closed source
License not stated	License not stated
Account needed	Account needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 23, 2026

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