Best Open Source Alternatives to Squarespace CMS

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

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

Squarespace CMS

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Squarespace CMS alternatives compared

Open-source alternatives to Squarespace CMS, compared by stars, license and platform
Tool		License	Platforms	Self-hosted
WordPress	21,523	GPL-2.0-or-later	LinuxmacOSWindowsDocker	Yes	Nov 2026	Visit
Joomla	5,165	GPL-2.0	LinuxmacOSWindowsDocker	Yes	Nov 2026	Visit
Concrete CMS	854	MIT	LinuxmacOSWindowsDocker	Yes	Oct 2026	Visit

Top open-source Squarespace CMS alternatives

WordPress21,523GPL-2.0-or-later

WordPress is a self-hosted CMS replacing hosted builders like Wix with full database control, block editing, and an extensible plugin engine.

LinuxmacOSWindowsDockerWeb

vs Squarespace CMS: a free, open-source option you fully control, licensed GPL-2.0-or-later.

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Joomla5,165GPL-2.0

Joomla is a self-hosted CMS replacing platforms like Adobe Experience Manager with native REST APIs, granular permissions, and multilingual content.

LinuxmacOSWindowsDockerWeb

vs Squarespace CMS: a free, open-source option you fully control, licensed GPL-2.0.

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Concrete CMS854MIT

Concrete CMS is a self-hosted alternative to Sitecore and proprietary website builders, offering in-context page editing with full data sovereignty.

LinuxmacOSWindowsDockerWeb

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

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Best Open Source Alternatives to Squarespace CMS

Squarespace CMS

Squarespace CMS alternatives compared

Top open-source Squarespace CMS alternatives

The modern standard for Protobuf workflows

Mentoring for backend developers. Consulting for startups.