Supabase is an open-source Postgres development platform that provides a Postgres database, Auth, instant APIs, Edge Functions, Realtime, Storage, and Vector embeddings for building apps.

Firebase is Google's mobile and web app development platform, offering tools to build, run, and grow high-quality apps with integrated AI features.

Back4App is a low-code Backend as a Service (BaaS) platform for rapidly launching and scaling applications using Parse Server, offering auto-generated APIs and AI tools.