Dgraph is the best backend as a service tool I've used. The most powerful feature is that you can upload a txt file with your GraphQL types, and it'll generate a GraphQL API that is backed by an insanely powerful graph database. With Dgraph, complex and/or slow SQL JOIN queries are replaced by simple GraphQL queries that perform well regardless of the relationships that exist in your schema. You don't need to worry about n+1 queries anymore.

I have been working on this for 2 years and really amazing the performance. And Dgraph Engineering support is very promising and fixed the issues on time on a priority basis (applicable for Enterprise support).

It is fast, reliable, and easily scalable. You can easily spin up a complete solution (CRUD operations) in few mins using GraphQL, which is just outstanding. Excellent and very quick support.