When comparing Plone vs Flextype, the Slant community recommends Flextype for most people. In the question“What are the best open source headless CMS's?” Flextype is ranked 2nd while Plone is ranked 3rd. The most important reason people chose Flextype is:
Define unlimited custom fields for any of your entries.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Open source
Not only does this provides complete transparency to the user, it also enables a large base of developers to work simultaneously on solving any arising the issues and improving the platform.
Pro Remarkable level of security
Plone has been around for almost two decates and to date less than 50 vulnerabilities were discovered in the platform. That's at least ten times less than any of the popular alternatives, including Wordpress, Drupal, and Joomla. In fact, government agencies, such as NASA and FBI use Plone for its high level of security.
Pro Can run on virtually anything
Plone runs on Windows, Mac, Linux, Chromebooks, RaspberryPi, servers, and cloud services.
Pro Multilingual UI and documentation
Plone platform along with all documentation is available in more than 40 languages, including Chinese, Japanese, Greek, Arabic, and Hebrew.
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.