Send API requests, inspect responses and organise request collections.
Free and open source (MIT licence per GitHub). Web, desktop and CLI clients, with cloud, offline and self-hosted routes.

Developer tools
Keep API request collections locally and run them without cloud sync.
Keep API request collections locally and run them without cloud sync.
Author and run API requests, assertions and collections stored in local files and shared through your own Git tooling. Replaces the API-client and collection-testing slice of the linked products. Does not supply a mock API server, hosted monitors, enterprise governance or every paid collaboration feature.
Native Git/enterprise extras are paid. Exchange local collection files through your own Git tooling; no Postman cloud workspace, access control or hosted viewer parity. Postman basic individual requests are already free. Free edition: two workspaces and five OpenAPI syncs per month; paid collaboration features are not included.
Each comparison covers the workflow described above, rather than every paid feature.