Best Open Source Alternatives to Postman

Compare the best free and open-source alternatives to Postman — self-hosted and desktop replacements you fully control, ranked by GitHub stars, license and platform support.

Curated by open-source.store · Updated November 2026 · 11 alternatives

Postman

Proprietary SaaS

PricingFreemium

Platformsmacos, windows, linux, web

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Postman alternatives compared

Open-source alternatives to Postman, compared by stars, license and platform
Tool		License	Platforms	Self-hosted
Hoppscotch	80,723	MIT	WebDocker	Yes	Oct 2026	Visit
Bruno	48,011	MIT	macOSWindowsLinux	No	Nov 2026	Visit
Insomnia	40,110	Apache-2.0	LinuxmacOSWindows	No	Nov 2026	Visit
Yaak	19,402	MIT	LinuxmacOSWindows	No	Nov 2026	Visit
Scalar	16,364	MIT	DockerLinuxmacOSWindows	Yes	Nov 2026	Visit
Mockoon	8,467	MIT	LinuxmacOSWindows	No	Nov 2026	Visit
Requestly	6,760	—	DockerLinux	Yes	Nov 2026	Visit
HTTPie	4,057	BSD-3-Clause		No	Mar 2025	Visit
Firecamp	2,620	AGPL-3.0	macOSWindowsLinuxWeb	No	Mar 2026	Visit
Voiden	2,016	Apache-2.0	LinuxmacOSWindows	No	Nov 2026	Visit

Top open-source Postman alternatives

Hoppscotch80,723MIT

Hoppscotch is an open-source API client replacing Postman with a lightweight web interface, Tauri desktop app, and self-hosted Docker deployment.

WebDocker

vs Postman: a free, open-source option you fully control, licensed MIT.

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Bruno48,011MIT

Bruno is an open-source, offline-first API client replacing Postman and Insomnia by storing request collections directly as plain text files in Git.

macOSWindowsLinux

vs Postman: a free, open-source option you fully control, licensed MIT.

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Insomnia40,110Apache-2.0

Insomnia is an open-source API client replacing Postman with faster multi-protocol debugging, Git-based collection syncing, and local-first data privacy.

LinuxmacOSWindows

vs Postman: a free, open-source option you fully control, licensed Apache-2.0.

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