1. Flexibility: One key difference between Kirby CMS and Strapi is their approach to flexibility. Kirby CMS offers a more flexible and customizable solution, allowing developers to tailor the system to fit their specific needs. It allows for the creation of custom fields, templates, and modules, providing a high degree of flexibility in designing the content structure and presentation. On the other hand, Strapi follows a more structured approach with predefined content types and fields, limiting the level of customization.

2. User Interface: Another notable difference lies in the user interface of Kirby CMS and Strapi. Kirby CMS focuses on simplicity and user-friendliness, providing a clean and intuitive interface that is easy to navigate. It offers a minimalist design with straightforward controls, making it suitable for users with limited technical knowledge. In contrast, Strapi offers a more comprehensive and feature-rich user interface, providing a range of options and settings for managing content, roles, permissions, and more. This makes Strapi more suitable for larger projects with complex requirements.

3. Data Structure: The way data is structured and managed also differs between Kirby CMS and Strapi. Kirby CMS uses a file-based approach, where content and data are stored in flat files and directories rather than a traditional database. This approach offers simplicity and allows for version control, making it easy to collaborate and manage content through Git. On the other hand, Strapi utilizes a database-driven approach, storing content and data in a database system. This provides more advanced querying and filtering capabilities, making it suitable for projects that require complex data management.

4. Extensibility: When it comes to extensibility, Kirby CMS and Strapi have different approaches. Kirby CMS provides a plugin system, allowing developers to extend the core functionalities of the system with custom functionalities or integrations. This offers flexibility and allows for the creation of tailored solutions. In comparison, Strapi offers a modular architecture with pre-built plugins and integrations. While it may not provide the same level of customization as Kirby CMS, it offers a wide range of ready-to-use features and functionalities, reducing the development time and effort.

5. Hosting and Deployment: Kirby CMS and Strapi also differ in their hosting and deployment options. Kirby CMS is a self-hosted solution, meaning it needs to be hosted on a web server or a hosting provider of choice. This provides full control and flexibility over the hosting environment but requires more technical expertise and maintenance. On the other hand, Strapi offers both self-hosting and a cloud-hosted solution. It provides a platform as a service (PaaS) option, allowing users to deploy and host their projects on the cloud with ease. This makes it more suitable for users who prefer a managed hosting solution or do not have extensive technical knowledge.

6. Community and Support: Lastly, the community and support around Kirby CMS and Strapi differ. Kirby CMS has a smaller but highly engaged and supportive community. It has an active forum where users can ask questions, share ideas, and get help from the community. Additionally, Kirby CMS offers professional support services, including consulting and training. On the other hand, Strapi has a larger community and a dedicated Slack channel for support and discussions. It also provides enterprise-level support options for users who require guaranteed response times and priority assistance.

In summary, the key differences between Kirby CMS and Strapi lie in their flexibility, user interface, data structure, extensibility, hosting and deployment options, as well as the community and support around them. Kirby CMS offers more flexibility and customization options, a simpler user interface, and a file-based data structure. On the other hand, Strapi provides a more structured approach, a feature-rich user interface, a database-driven data structure, a modular architecture, and both self-hosting and cloud-hosting options. The choice between the two depends on the specific requirements and preferences of the project.