When comparing Strapi vs GraphCMS, the Slant community recommends Strapi for most people. In the question“What are the best open source headless CMS's?” Strapi is ranked 1st while GraphCMS is ranked 11th. The most important reason people chose Strapi is:
Strapi comes with blueprints that let you create, read, update and delete your data. You also can paginate, sort and filter your results in a matter of seconds with simple but yet specific parameters.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Auto-generate REST APIs
Strapi comes with blueprints that let you create, read, update and delete your data. You also can paginate, sort and filter your results in a matter of seconds with simple but yet specific parameters.
Pro Users, groups and permissions
Manage user settings, login, registration, groups and permissions on the fly. Strapi delivers all those essential features out-of-the-box.
Pro Out-of-the-box administration panel
Easy way to manage your application. This panel allows you to add/edit/delete entries for your APIs, manage your users, groups and permissions. In the future, it will be such as WordPress-like administration panel dedicated to your application.

Pro Webhooks
Webhooks enable you to trigger custom code as soon as your content changes.

Pro Image processing
On-the-fly image transformations, such as resizing or cropping just by adding parameters to your media´s URL.

Pro Roles and permissions
The roles and permissions feature allows you to assign your collaborators different roles, such as Developer, Editor and Collaborator.

Pro Multi-project management
You can manage multiple projects and create up to 50 users per account to help manage those projects.
Cons
Con Not open source

Con No content versioning
