Some products like https://www.contractstandards.com/ are beginning to appear. They need document classification, text sentence level classification, entailment, clustering are all necessary for making contract analysis easier for the user.
And these products need good domain experts to identify pain points where ml can help.
In ml as API side, one potentially valuable product suite I have seen is https://aylien.com/text-api/ . Even they are building additional products like news analysis.
But I am little sceptical on whether ml as API can scale in terms of addressing specific task-specific nuances needed for products building upon them.