Hoppscotch
Sleek, intuitive API development and testing platform
Aug 201980.7k+236MITupdated today
R.I.P.Open-source alternatives to Postman
14 projects replace Postman, the API client. 12 shipped code in the last 30 days.
Postman began as a simple API client and grew into a cloud platform that wants you signed in. In 2023 it retired Scratch Pad, its offline mode, so collections sync to Postman's servers. When requests carry API keys and internal endpoints, that sync becomes a security review waiting to happen.
Bruno stores collections as plain text files in your git repo, with no account, so changes go through normal pull requests. Hoppscotch is a fast web client you can also host for a team. Insomnia covers REST, GraphQL and gRPC, though Kong's 2023 push toward cloud accounts drove some users away. Yaak is a newer offline desktop client with git integration.
14 shown
Bruno
Lightweight, fast, and open-source API client for developers
Sep 202247.8k+681MITupdated 1d ago
Insomnia
Powerful API development and testing made effortless
Apr 201640.1k+39Apache-2.0updated today
Yaak
Fast, secure, offline API client with Git integration
Feb 202319.3k+95MITupdated 1d ago
Keploy
Turn production traffic into regression tests, no code changes
Jan 202218.7k+196Apache-2.0updated today
Scalar
Open-source API documentation and testing platform
Aug 202316.3k+138MITupdated today
Mockoon
Effortless API mocking for seamless development
Jul 20178.4k+33MITupdated today
Requestly
Intercept, modify, and debug HTTP(S) requests effortlessly
Dec 20166.8k––updated 1d ago
HTTPie
Modern command-line HTTP client for the API era
Dec 20214.1k+14–updated 1y ago
Firecamp
Unified API development ecosystem for modern teams
May 20232.6k+6AGPL-3.0updated 7mo ago
Fusio
API management platform for developers and AI agents
Jul 20152.1k+11Apache-2.0updated 13d ago
Voiden
Build APIs like code with Git-native workspace
May 20251.9k+101Apache-2.0updated 1d ago
Pororoca
An API testing tool with support for HTTP/2 and HTTP/3. Alternative to Postman.
Mar 2022669––updated today
Gravitee
Unified API, event, and AI agent management platform
May 2015461+6Apache-2.0updated today
What you give up by leaving Postman
The honest part. Free and open usually costs something else.
- Monitors and Flows Postman's scheduled monitors, Flows and hosted mock servers need separate tools or are missing.
- Live team sharing Sharing collections in real time is simpler in Postman than through git or a self-hosted server.
- Scripts may need edits Collections import well, but pre-request and test scripts that use Postman's APIs may need changes.
- No public API network Postman's public network of ready-made collections for popular APIs has no open-source equivalent.
