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Hoppscotch is an open source Postman alternative for testing HTTP, GraphQL, WebSocket, and MQTT APIs in a lightweight browser interface. MIT licensed; self-host with Docker or use the hosted version.
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Hoppscotch is an open source Postman alternative that covers API testing for HTTP, GraphQL, WebSocket, MQTT, and Server-Sent Events in a fast, browser-based interface that requires no desktop install.
Postman now requires an account to use most features, syncs request collections to Postman's servers by default, and has progressively moved team collaboration behind paid tiers. For developers who need a fast, private API testing tool or teams that cannot send request history to an external service, these constraints create friction on every workday.
Hoppscotch opens in a browser, connects to any API, and saves collections locally or in a self-hosted workspace without requiring an account. Multi-protocol support covers the full range of API types a modern team encounters: REST, GraphQL, WebSocket, Socket.IO, MQTT, and SSE in one interface. The self-hosted edition runs with Docker and stores team workspaces, environments, and history on your own servers. MIT licensed.
The self-hosted edition runs with Docker Compose. It requires a Postgres database and stores team workspaces, environments, and request history on your own servers. Individual use runs entirely in the browser at hoppscotch.io with no account or installation required.
MIT for the web and desktop apps. The self-hosted enterprise backend requires a commercial license for team features (access control, audit logs); individual and open-source use is MIT and free.
Hoppscotch is best for developers who want a fast, open source API testing tool that runs in a browser without Postman's account requirements, and for teams that need to self-host their API request history for compliance or data privacy reasons.
Unlike Postman, Hoppscotch works without an account, keeps your request history local by default, and covers WebSocket and MQTT protocols alongside standard REST and GraphQL without requiring a paid plan.
