Squidex - an OpenSource Headless CMS, a CMS with an API
Squidex is 100% Open Source Headless CMS software with a high quality code base, centralized, structured and with seamless integrations to other systems.
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Squidex is an open-source headless CMS and content management hub that delivers structured content via a powerful API to websites, mobile apps, and any client.
🚀 Overview
Squidex is a flexible, API-first headless CMS designed for modern content management needs. Unlike traditional CMS platforms, it decouples content creation from presentation, allowing developers to fetch and display content via REST/GraphQL APIs with OData support anywhere.
It solves the problem of fragmented content management across multiple channels by providing a centralized platform that's scalable, secure, and extensible. Squidex is built for developers seeking a customizable backend and non-technical editors who need an intuitive UI for content workflows, assets, and schemas.
Created by Sebastian Stehle in 2017 as an open-source alternative to expensive SaaS CMS like Contentful, it emphasizes high-quality code, MIT license, and enterprise-grade features like clustering and GDPR compliance to meet demands of large teams and corporations.
✨ Key Features
- Rich API: GraphQL, REST with OData filtering, Swagger docs—query content efficiently without custom backends.
- Multi-Database Support: Works with MongoDB, PostgreSQL, MySQL, SQL Server for flexible deployments.
- Admin UI & Extensibility: Intuitive interface for schemas, assets, workflows; easily add custom fields, rules (e.g., webhooks, emails), and editors.
- Asset Management: Handles images/videos with metadata extraction, CDN integration.
- Clustering & Performance: High-availability setups, fast production performance.
- Upcoming: Enhanced cloud features, more integrations.
🛠 Tech Stack
- Frontend: TypeScript, SCSS, HTML, JavaScript (Angular-based admin UI)
- Backend: ASP.NET Core, C#, CQRS architecture
- Database: MongoDB, PostgreSQL, MySQL, SQL Server
- Auth: Built-in with OIDC support
- Hosting: Docker, Kubernetes, Azure, AWS, GCP, self-hosted or Squidex Cloud
👥 Who Is This For?
This project is useful for:
- Developers who want to build custom UIs on a robust headless CMS backend
- Teams looking for scalable content management without vendor lock-in
- Indie makers building apps, sites, or IoT solutions needing structured data
📸 Screenshots / Demo
- Live demo: https://cloud.squidex.io (free signup)
- GitHub: https://github.com/Squidex/squidex
🔥 Project Status
- 🟢 Actively building
Last updated: 2026-03-24
❓ FAQ
Is this project free?
Freemium — Open source self-hosting is completely free (MIT). Cloud SaaS starts with a free Starter plan (20k API calls, 500MB storage), paid plans from €19/mo.
Is the source code available?
Yes — https://github.com/Squidex/squidex (MIT license, 6k+ commits, latest release 7.21.0)
Can I contribute?
Yes, create issues for bugs/features, submit PRs—community welcomes contributions; see docs and forum at https://support.squidex.io.
📬 Contact & Links
- Website: https://squidex.io
- GitHub: https://github.com/Squidex/squidex
- Twitter/X: https://x.com/squidexcms
- Email: hello@squidex.io
Built with ❤️ and kept warm on WarmIndex.
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