We use jekyll for our blog( https://mentii.com/blog ) and use disqus for the commenting system. If you are comfortable using markdown and need something lightweight and fast, then jekyll is perfect. On the other hand wordpress has a lot of themes and plugins to choose from and pretty much everything that you'll ever need is already there. If there are non developers who are going to contribute to your blog, then wordpress would be a better option IMHO.