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Postman vs Advanced REST Client: catalog facts
Postman	Advanced REST Client
Freemium A free tier covers individual use with limits on collaborators, collection runs and…	Free Free to download; the source is published on GitHub.
Windows, macOS, Linux, Web, Browser extension	macOS
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	Dedicated desktop app for manual HTTP and REST testing Source code is public and the repository is still active
Built around a cloud workspace, and an account is effectively required Offline and local-only use has become harder over successive versions	No releases published on the GitHub releases page License is not clearly identified in the repository metadata
Downloadable app, Web application, Browser extension	Downloadable app
Closed source	Closed source
License not stated	License not stated
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 21, 2026	Official website Full listing and sources Checked October 2, 2026

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