Compare Grav vs. Contenta
Grav is a fresh flat-file database which is easy to install. It uses a number of Symfony components and is very fast to get started with.
Contenta is a Drupal 8 distribution that aims to provide a headless, decoupled shell for Drupal 8.
CMSes vailable for comparison: BackBee, Bolt CMS, Concrete5, Contenta, Contentful, Cosmic.js, Craft CMS, Drupal 8, eZ Platform, Fork CMS, GraphCMS, Grav, Jarves, Joomla!, Kunstmaan, October CMS, Open Orchestra, Pagekit, Pimcore, PyroCMS 3, Reservoir, Spress, Sulu CMS, Symfony CMF, Symphony CMS