Sure, Firebase is awesome.

But have you considered these open source alternatives?

They are free, self-hostable and community-driven.

Check by yourself: Supabase .

So is Supabase

オープンソースのFirebase代替サービス
★ 76.8K database data api License: Apache-2.0
SupabaseはオープンソースのFirebase代替サービスです。