API tools

Alternatives to Postman

Compare these candidates if you want self-hosting, data control or less dependence on Postman's hosted service. Actual costs depend on deployment and required features.

Check clients, docs, tests, mocks and collaboration; documentation renderers are not full API platforms.

Compare candidates

Growth uses the latest collected snapshots; — means unavailable. Stars and licenses are not substitutes for feature verification.
Project	Stars	7-day gain	Language	License	Maintenance
hoppscotch	80,717	+37	TypeScript	MIT	✅ Recently maintained
bruno	47,981	—	JavaScript	MIT	✅ Recently maintained
yaak	19,396	—	TypeScript	MIT	✅ Recently maintained

hoppscotch

hoppscotch/hoppscotch

Open-Source API Development Ecosystem • https://hoppscotch.io • Offline, On-Prem & Cloud • Web, Desktop & CLI • Open-Source Alternative to Postman, Insomnia

✅ Recently maintained

Compare for browser-based API work; verify proxy and team-deployment requirements.

Repository verified 2026-11-02 · Official repository & installation

bruno

usebruno/bruno

Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia)

✅ Recently maintained

Trial when local API collections and version control matter.

Repository verified 2026-11-02 · Official repository & installation

yaak

mountain-loop/yaak

The most intuitive desktop API client. Organize and execute REST, GraphQL, WebSockets, Server Sent Events, and gRPC 🦬

✅ Recently maintained

Match the project description to required features, then trial migration and deployment with a small real dataset.

Repository verified 2026-11-02 · Official repository & installation

Before migrating

Check exports/imports, required features, permissions, backups, security updates and total operating cost. Candidates are not guaranteed feature-equivalent; enterprise extensions and model services may have separate terms and costs.