Grav is a modern Web-CMS, implemented in PHP, utilizes flat-file storage, and is optimized for low latency. It uses MD/CommonMark for page structuring, provides a lean but powerful API and plugin hook system, uses Twig for templating, YAML configuration, Doctrine caching. The file store allows simple backups and versioning using any SCM. Grav comes with a feature-rich admin interface and CLI tools are provided.
WordPress is a widely used and highly extensible blogging plattform and web content management system. It provides customizeable themes, and over 30000 community-contributed plugins, is easy to configure and provides extensive documentation and howtos. WordPress can be used in a multi-user setup as well, repurposed as online shop or multimedia hosting, provides search enginge optimization, RSS/Atom news feeds, track- and pingbacks, link management, various formatting filters, and a built-in blog
Bolt is a PHP web content management system with a modern interface and codebase. It supports mobile display, user-friendly WYSIWYG editing, structured content types, media management and uploads, user accounts, and content is implicity revisioned.