Browse free open source C# Headless CMS and projects below. Use the toggles on the left to filter open source C# Headless CMS by OS, license, language, programming language, and project status.

  • E-commerce Fulfillment For Scaling Brands Icon
    E-commerce Fulfillment For Scaling Brands

    Ecommerce and omnichannel brands seeking scalable fulfillment solutions that integrate with popular sales channels

    Flowspace delivers fulfillment excellence by pairing powerful software and on-the-ground logistics know-how. Our platform provides automation, real-time control, and reliability beyond traditional 3PL capabilities—so you can scale smarter, faster, and easier.
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  • Unrivaled Embedded Payments Solutions | NMI Icon
    Unrivaled Embedded Payments Solutions | NMI

    For SaaS builders, software companies, ISVs and ISOs who want to embed payments into their tech stack

    NMI Payments is an embedded payments solution that lets SaaS platforms, Software companies and ISVs integrate, brand, and manage payment acceptance directly within their software—without becoming a PayFac or building complex infrastructure. As a full-stack processor, acquirer, and technology partner, NMI handles onboarding, compliance, and risk so you can stay focused on growth. The modular, white-label platform supports omnichannel payments, from online, mobile and in-app to in-store and unattended. Choose from full-code, low-code, or no-code integration paths and launch in weeks, not months. Built-in risk tools, flexible monetization, and customizable branding help you scale faster while keeping full control of your experience. With NMI’s developer-first tools, sandbox testing, and modern APIs, you can embed payments quickly and confidently.
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  • 1
    Squidex

    Squidex

    Headless CMS and content managment hub

    You don't need another system for your content. You need it in a single place. Centralized, structured, and with seamless integrations to other systems. Available from everywhere and for all digital platforms, such as Apps, websites, and server applications. All changes in Squidex are handled by a versioning system. This makes it possible to compare different versions of your content and to roll back to a previous version. It also provides the audit log, so that you can see who did what and when. Our versioning system also enables it to react to changes in the system. So you can trigger external systems when content is changed and also post your blog to Medium or create a tweet automatically. We know that companies can have very complicated rules about who can create, review or publish content. With our compelling workflow system, you can implement your rules in Squidex.
    Downloads: 8 This Week
    Last Update:
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  • 2
    Cofoundry

    Cofoundry

    Cofoundry is an extensible and flexible .NET Core CMS

    Cofoundry is an unobtrusive ASP.NET Core CMS focused on code-first development and user-friendly content management. Run integrated, decoupled or headless, it's your choice. Cofoundry is there when you want it and gets out of your way when you don't. Get back to writing regular .NET code you love and enjoy complete freedom with your front-end technology and designs. We understand that every application is different. Cofoundry is an adaptable framework that let's you swap in your preferred tools and scale up your architecture when you need it. DI is at the heart of Cofoundry which makes it really easy to override any implementation. Plugins are easily installed via Nuget, but it’s also simple to inject your own custom implementation. CMS administration interfaces are often built to serve both developers and content editors which leads them to be complicated and full of jargon.
    Downloads: 0 This Week
    Last Update:
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