Concrete CMS is a free and open-source content management system that empowers teams of content creators, designers, and developers to build, author, and publish websites with intuitive tools and enterprise-grade security.

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🚀 Overview

Concrete CMS stands out in a crowded CMS market by combining powerful functionality, ease of use, and low deployment costs. It solves the problem of teams struggling to manage complex websites securely and collaboratively, offering in-context editing, workflow approvals, version control, and compliance-ready security (ISO 27001, SOC 2, HIPAA). Used by organizations like the U.S. Army, it ensures robust performance for high-stakes sites.

This project is built for content teams, designers, developers, and enterprises needing a flexible CMS that scales from simple sites to multisite networks. It's community-driven, evolved from Concrete5, to provide a developer-friendly, extensible platform that's simple for non-technical users.

The global community built it to create an open-source alternative that's secure, customizable, and team-oriented, saving time and reducing reliance on plugins.

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✨ Key Features

• Intuitive in-context WYSIWYG editing with drag-and-drop blocks, media manager, and auto-save drafts (enables quick content updates without code)
• Advanced team collaboration: granular permissions, user groups, multi-step workflows, version history, and audit trails (perfect for enterprise teams)
• Multisite and multilingual support with centralized dashboards, shared resources, and translation management (handles global or networked sites)
• Built-in marketing and SEO tools: forms/CRM integration, XML sitemaps, social sharing, Open Graph, and analytics (drives engagement without add-ons)
• Upcoming: Ongoing version 9.5.x enhancements, including better CI/CD and dependency updates

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🛠 Tech Stack

• Frontend: JavaScript, SCSS (5.1%), LESS, Bootstrap, responsive CSS
• Backend: PHP (87.9%) with Composer for dependencies
• Database: MySQL 5.7+, MariaDB
• Auth: Built-in (users, groups, attributes, SSO support)
• Hosting: Self-hosted (Apache/Nginx), Concrete Managed Hosting, Cloud providers

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👥 Who Is This For?

This project is useful for:

• Developers who want to extend and customize an open-source CMS with add-ons and themes
• Teams looking for secure collaboration, workflows, and multisite management
• Enterprises and agencies building compliant sites for government or business

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📸 Screenshots / Demo

• Live demo: https://community.concretecms.com/get-concrete-site
• GitHub: https://github.com/concretecms/concretecms

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🔥 Project Status

• 🟢 Actively building

Last updated: 2026-03-24

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❓ FAQ

Is this project free?

Yes — Open Source (MIT license). Self-hosting is completely free; managed hosting is freemium starting at $4.99/month for Starter plan.

Is the source code available?

Yes — https://github.com/concretecms/concretecms

Can I contribute?

Yes — Read CONTRIBUTING.md, report issues, submit PRs on GitHub, join forums at https://forums.concretecms.org/, or edit documentation.

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📬 Contact & Links

• Website: https://www.concretecms.com
• GitHub: https://github.com/concretecms/concretecms
• Twitter/X: https://x.com/concrete_cms
• Email: Contact via form at https://www.concretecms.com/about/contact-us

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