Best Open Source Alternatives to Formstack

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

Curated by open-source.store · Updated August 2026 · 3 alternatives

Formstack

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Formstack alternatives compared

Open-source alternatives to Formstack, compared by stars, license and platform
Tool		License	Platforms	Self-hosted
Formbricks	12,698	AGPL-3.0	LinuxmacOSWindowsDocker	Yes	Jul 2026	Visit
LimeSurvey	3,683	GPL-2.0	LinuxmacOSWindowsDocker	Yes	Aug 2026	Visit
Form.io	2,306	MIT	LinuxmacOSWindowsDocker	Yes	Jul 2026	Visit