I was wondering the same thing a while back.

I signed up for a bunch of platforms just to cover all the bases and see the differences: Ghost, Medium, Silvrback, Svbtle, and Postagon.

I won't say which is my favorite, because I think everybody has different needs. But I found a decent Medium article which compares most of the big platforms. Might be of help to anyone else looking for a new blog home: https://medium.com/blogging-and-seo-tips/d62682d9b0aa