What are some open-source CMS options that offer dynamic functionalities like Webflow, are suitable for large enterprise sites/web apps, secure, scalable, customizable, and extendable, while also having a visual interface and potentially being whitelabel?

You're looking for open-source CMS platforms that are enterprise-ready, support dynamic capabilities like Webflow, are secure, scalable, customizable, and ideally offer a visual interface with whitelabeling potential. Here are the top contenders that align with those goals:

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1. Directus

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• Visual interface: Fully visual admin interface with drag-and-drop schema builder.
• Database-first: Works with your existing SQL database (PostgreSQL, MySQL, SQLite).
• API-first: REST and GraphQL API auto-generated.
• Extendable: Custom hooks, extensions, and modules.
• Whitelabeling: Paid plans offer better branding support, but basic UI can be themed.
• Use case: Ideal for headless CMS + internal tools platforms.
• Security and scalability: Designed for modern architectures; role-based access control (RBAC) built in.

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2. Strapi

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• Dynamic content types: Visual UI to build content types and relationships.
• Headless + extendable: Provides REST/GraphQL APIs; plugin system is strong.
• Customizable admin panel: Can be branded/customized (partially whitelabel).
• Built on Node.js: Good for modern JavaScript stack integration.
• Security: Includes RBAC, customizable middleware, and strong user control.
• Enterprise-friendly: Suitable for large-scale use with ability to scale horizontally.

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3. Payload CMS

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• Open-source headless CMS: Built with modern stack (Node.js, React, MongoDB).
• Powerful access control: Advanced RBAC and field-level security.
• Highly customizable: Custom components, hooks, and logic everywhere.
• Admin UI: Beautiful visual admin interface, customizable and skinnable.
• Self-hostable: Ideal for whitelabel solutions.

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4. Plasmic

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• Visual builder for React projects: Drag-and-drop editor similar to Webflow.
• Component reuse: Works with real React components passed in.
• Headless CMS integration: Can connect to headless CMSs or databases.
• Whitelabeling: Enterprise plans may allow full brand control.
• Use case: Focused on frontend experience; can integrate with your backend.

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5. Builder.io (with open-source Mitosis)

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• Visual editor: Webflow-style editing with production-ready output.
• Integrates with frameworks: Works with React, Vue, Angular, etc.
• Open-source tools: Mitosis (write once, compile anywhere) is part of their dev stack.
• Enterprise-ready: Includes roles, preview environments, and AB testing.
• Whitelabel options: Enterprise customers can customize the UI.

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6. Sanity.io (With open source Studio)

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• Schema-as-code but visual Studio UI: Developer-friendly plus usable interface.
• Highly customizable: React-based Studio lets you build any authoring experience.
• Headless CMS: Structured content with GROQ query language support.
• Whitelabel possible: Studio is open source—can be fully customized/hosted as your own.
• Secure and scalable: Popular on enterprise-grade infrastructure.

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Summary

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For the most Webflow-like experience with enterprise power:

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• Directus or Strapi are best for headless CMS setups with dynamic content and extendability.
• Payload CMS shines if you want a developer-first open-source CMS with a polished UI.
• Plasmic and Builder.io offer more Webflow-style visual building, integrated with production code.
• Sanity.io gives you total control and customization over the interface, great for enterprise teams.

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All of the above can be custom-branded and self-hosted, making them suitable for whitelabel SaaS or internal platforms.