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.

Cosmic

For both developers and content creators, the Cosmic Headless CMS offers a versatile and scalable content management experience.

The Cosmic CMS is used by businesses to manage their blog content since it is simple to manage team members, content, and approval workflows. Your team can build apps and manage content more quickly by working collaboratively with capabilities like Revision History, Content Preview, and Scheduled Publishing.

Cosmic offers simple content modeling and migration tools to make it easier for you to get started, whether you're creating a new blog or transferring an existing one.

Since Cosmic has guidelines for several JS frameworks, including React, Vue, Angular, and Node.js, it is mostly used for websites and applications created in JavaScript. However, it has expanded to include tutorials for Go, Ruby on Rails, Java, .Net, and Python as well.