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Milkman vs Postman: catalog facts
Milkman	Postman
Free Free and open source.	Freemium A free tier covers individual use with limits on collaborators, collection runs and…
Windows, macOS, Linux	Windows, macOS, Linux, Web, Browser extension
Plugins for REST, GraphQL, gRPC, Socket.IO and databases Git-based sync of collections	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
Smaller community than mainstream API clients Documentation lives mainly in the repository	Built around a cloud workspace, and an account is effectively required Offline and local-only use has become harder over successive versions
Downloadable app	Downloadable app, Web application, Browser extension
Open source	Closed source
License not stated	License not stated
No account needed	Account needed
Works offline	Needs internet
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 21, 2026

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