Yes, mongodb and meteor and minimongo do something similar but with much more restrictions on what you can do.
RxDB does exactly one thing which is being a client side database. You are not tied to a specific ecosystem or backend database.
RxDB does exactly one thing which is being a client side database. You are not tied to a specific ecosystem or backend database.
Anyway, database is hard, opensource is great. We love them both, RxDB or Meteor.