If anyone is particularly brave, we are a new platform which is like Firebase, except it's built with Postgres:
We are are essentially rebuilding [DabbleDB](https://en.wikipedia.org/wiki/Dabble_DB) for the UI, and you get a bunch of middleware which is auto-generated: REST APIs, Realtime (CDC), auto-updating documentation. Also we will tackle some of the more difficult tasks for Postgres like replicating your database close to your users.
Also we're opensource! https://github.com/supabase/