I'm the founder at CloudBoost.io and we've built a NoSQL database service that does everything which you've listed (except for Offline Sync which we're building now).
The idea is as a developer - You don't really have to care about about "Which database you should actually store your data in?" and this is why we have machine learning service that actually learns how you store and how you query your data and figures out the database where your data should naturally belong.
As a developer, You only care about storing your data and getting your data back, and that's what we enable you to do.
Let me know if this helps, and feel free to reach out to nawaz@cloudboost.io if you need any more information / help.
The idea is as a developer - You don't really have to care about about "Which database you should actually store your data in?" and this is why we have machine learning service that actually learns how you store and how you query your data and figures out the database where your data should naturally belong.
As a developer, You only care about storing your data and getting your data back, and that's what we enable you to do.
Let me know if this helps, and feel free to reach out to nawaz@cloudboost.io if you need any more information / help.