Grav CMS without any database

Grav is a modern open-source flat-file CMS (Content Management System). It is quite robust and very fast. If you want a fast and no fluff CMS then Grav is what I will recommend. WordPress sometimes is too bulky for simple sites or blogs. The Grav admin plugin provides a simple and intuitive interface to make configuration and content creation easy and enjoyable. Plugins are also supported in Grav which help to customize as per your needs. If you want to do any more customization it is possible in Grav but it is not as simple as WordPress Plugins.

Grav itself has quickly established itself as a go-to open source CMS platform in the past year.
It’s getting a lot of converts from WordPress, Drupal and Joomla users who are looking for a faster platform with more flexibility and adaptability compared to traditional content management systems.

Give it a try you will love it https://getgrav.org/