When comparing Jekyll vs Grav, the Slant community recommends Jekyll for most people. In the question“What are the best static site generators?” Jekyll is ranked 5th while Grav is ranked 17th. The most important reason people chose Jekyll is:
You can host your site with great stability and Jekyll support out of the box for free by using [GitHub pages](http://pages.github.com/).
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro GitHub Pages offers free hosting with a github.io subdomain
You can host your site with great stability and Jekyll support out of the box for free by using GitHub pages.
Pro Can use HTML to set up your page templates, and markdown for your blog posts
Pro Has a built in server
You can spin up a static server at localhost:4000 by running jekyll serve
Pro Code highlighting with pygments
Jekyll has Pygments code highlighting built in so you can create syntax highlighted code blocks on your blog.
Pro Excels at blogging
Jekyll pages are structured by posts, which makes it easier to build a blog.
Pro Decent documentation
Link to docs
Pro Import your existing blog from many sources
Jekyll supports importing from many dynamic blog engines:
- CSV
- Drupal 6
- Drupal 7
- Enki
- Google Reader
- Joomla
- Jrnl
- Marley
- Mephisto
- Movable Type
- Posterous
- RSS
- S9Y
- Textpattern
- Tumblr
- Typo
- WordPress
- WordPress.com
Pro Has built in watch mode
Watch mode will reconstruct the site as pages are updated which is great for testing.
Pro Large, active and helpful community
Thanks to it's popularity, Jekyll has a large and active community of users. This means there is plenty of learning material available for Jekyll and it's easy to find help from other users when needed.
Pro Customisable with data and collections
Can make sites very different from blogs but with a lot of pages by making templates using data and collections.
Pro Can be hosted with any provider
Since Grav is built with PHP, it can be hosted on almost all web hosting providers. If the provider supports Wordpress, they also support Grav.
Pro Easy creation of templates and content
Supports Twig for templating with Parsedown for fast Markdown and Markdown Extra support.
Pro Easy to use admin panel
Well designed, easily usable and modern admin panel is a boost as it lets Clients edit the content easily.
Pro Custom fields for content
YAML-based page headers allow you easily add custom dynamic fields to your content.
Pro Open-source and free
Pro Extensive Documentation
Documentation is not an afterthought! Grav has a dedicated documentation site plus loads of tutorials and guides.
Pro Extensive documentation
Documentation is not an afterthought. Grav has a dedicated documentation site plus loads of tutorials and guides.
Pro Built-in package manager
Pro CLI Tools
Command line tools such as dependency installation, cache clearing, user creation, and backups.
Cons
Con It's slow for sites with a lot of posts

Con Little Windows support
Windows is not an officially supported platform and setting it up on Windows requires a lot more tinkering than Linux or OSX.
