Hoppscotch

What it does

Hoppscotch is a fast, browser-based, open-source API client supporting REST, GraphQL, and WebSocket requests, with shared workspaces and API mocking. It can also be self-hosted for teams that want to keep API traffic entirely internal. It covers the same core job as Postman (send a request, inspect the response, save it for later) with a lighter interface and no meaningful free-tier ceiling for individual use.

Who this helps

You test REST, GraphQL, or WebSocket APIs.

You want a fast, open-source alternative to Postman.

You want to self-host so API traffic stays internal.

Your team wants shared workspaces and API mocking.