When comparing Grav vs Flextype, the Slant community recommends Flextype for most people. In the question“What is the best PHP CMS?” Flextype is ranked 11th while Grav is ranked 12th. The most important reason people chose Flextype is:
Define unlimited custom fields for any of your entries.
Specs
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Pros
Pro Can be hosted with any provider
Since Grav is built with PHP, it can be hosted on almost all web hosting providers. If the provider supports Wordpress, they also support Grav.
Pro Easy creation of templates and content
Supports Twig for templating with Parsedown for fast Markdown and Markdown Extra support.
Pro Easy to use admin panel
Well designed, easily usable and modern admin panel is a boost as it lets Clients edit the content easily.
Pro Custom fields for content
YAML-based page headers allow you easily add custom dynamic fields to your content.
Pro Open-source and free
Pro Extensive Documentation
Documentation is not an afterthought! Grav has a dedicated documentation site plus loads of tutorials and guides.
Pro Extensive documentation
Documentation is not an afterthought. Grav has a dedicated documentation site plus loads of tutorials and guides.
Pro Built-in package manager
Pro CLI Tools
Command line tools such as dependency installation, cache clearing, user creation, and backups.
Pro Dynamic Content Types
Define unlimited custom fields for any of your entries.
Pro Free
MIT-licensed open source project and completely free to use.
Pro No external DB required
Pro Built-in REST API
Provides APIs organized around Representational State Transfer (REST) for working with content.
Pro Version Control
It is easy to version control all content in Flextype with GIT or any other Version Control System.
Pro Flexible
Simple but powerful Core API's.
Pro Super Fast
Elegance architecture and built-in smart cache.
Pro Tokenized API
Cons
Con Same CMS repackaged
Same CMS that got regurgitated over and over for years.