Merge All Of It Into One
There is MongoDB Atlas, Realm, & Stitch. Why don't you merge all of it into one - MongoDB Atlas.
There are a lot of platforms, which is very confusing for all of the developers to use. Instead, there can be only one platform in which, they can perform everything with simple integration of the programming languages.
You could simplify your docs as well and like I said, have only one type of integration with all of the programming languages.
If you implement my idea, it will become very easy for developing and you can get more customers. Why should everything be hard?