Hey,
Today is the day: for the last few weeks we’ve been working on SuggestCat ( https://www.suggestcat.com ) with my company Emergence Engineering ( https://emergence-engineering.com ).
Right now it has only one functionality: It shows suggestions provided by an AI, mostly grammar and typo fixes, but it’s more “alive” than that, as you can imagine 
. We plan to release a lot more in the near future ( complete sentence, rewrite in a given style, create task list etc. ) and looking for early users.
There is a free tier so anyone can try it out, the landing page also has an editor where you can check it out.
Any feedback is welcome!