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Postman vs RESTer: catalog facts
Postman	RESTer
Freemium A free tier covers individual use with limits on collaborators, collection runs and…	Free Free browser extension.
Windows, macOS, Linux, Web, Browser extension	Browser extension
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	Any HTTP method, headers and body Saved requests for reuse
Built around a cloud workspace, and an account is effectively required Offline and local-only use has become harder over successive versions	Runs only inside the browser Fewer collaboration features than full API platforms
Downloadable app, Web application, Browser extension	Browser extension
Closed source	Closed source
License not stated	License not stated
Account needed	No account needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 24, 2026

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