Storyblok

Storyblok is also a web service, so you only need to register an account to create a project. It is more difficult to use than Contentful, but has more room for customization. In addition to the main entities, here it's possible to make auxiliary ones to use as components of the main entities. Storyblok allows grouping entities and content independently.

Also, this CMS has a unique feature. It can include your code on the frontend to see a preview of the content being created, which is important for content managers.

Of course, Storyblok has some flaws. It's not beginner-friendly, so a bit of learning is required to understand its interface. Then, it is only available in the paid version. Storyblok also has restrictions for entities, content, and files, but they are much wider than in Contentful.

Finally, Storyblok is a good CMS if you have fairly complex data structures in your project and want to fine-tune them.

Prismic CMS

Prismic is a CMS backend for your websites and apps that is designed to increase developer productivity and includes a visual builder for creating posts and pages. Use your preferred programming language and framework with an API-based system for technical flexibility.

With Prismic CMS, you can easily, quickly, and flexibly manage content across the channels of your choice, including websites, applications, IoT devices, and dashboards.

Whether you're publishing to a web page, social media, or app, the platform's versatility lets you manage content across platforms.