Postman is a cloud-based platform that syncs your work when you're signed in.
If your organization has restrictions around cloud usage, consider these alternatives:
Work locally with Native Git (requires sign-in).
Use the Lightweight API Client for offline work.
Run collections with Newman in a private cloud or internal data center.
Note: If you’re using the Lightweight API Client, some collaboration tools such as Collections, Environments, Mocks, Monitors, and Documentation won’t be available.