Contentful

One of the most popular and simple Headless CMS. It runs as a web service, so you have only to register an account to create a project. Contentful is very easy to use, stable and has a free version. In addition, there are lots of plugins and a package for working with this CMS.

But there are some shortcomings. First of all, it's a limitation of entities (models) and fields in the model. Also, like many Headless CMS services, the size of uploaded files is limited.

Despite the great popularity of Contentful, it could be a challenge to create even a small project due to limitations. Therefore, we recommend using it only for very simple projects.

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.