Grav is a content management system (CMS) with a difference. Content management systems are commonplace in the modern web, with platforms like Wordpress (or other web hosting provider) powering a large percentage of websites. They provide an easy-to-use graphical interface for non-technical users to add articles and content while the developers handle the code separately (in a similar way to an easy-to-use website builder).
The major drawbacks come when the CMS is bloated with unneeded features, or forces developers to work in a counter-productive manner. Even a basic CMS-built website that's little more than a landing page relies on a database, which can make migration and management a larger task than it should be.
Meet Grav, the CMS built with the purpose of being lightweight, flexible – and without a traditional database. Yet it still has an optional administration panel with a graphical interface, user management and the same features expected of a CMS.
While Grav doesn't have a traditional database running on MySQL or similar, it does have a type of database which is stored in folders and plain text files. These files store content with the Markdown syntax with configuration stored in YAML. If you have content to store, try these cloud storage options.