Supabase

Supabase centers on PostgreSQL and adds the surrounding backend pieces small teams usually glue together: authentication (GoTrue), object storage with RLS-friendly policies, realtime channels, edge functions, and REST/GraphQL-style data access with PostgREST-style patterns. Row Level Security ties authorization to the database, which is powerful for multi-tenant SaaS when policies are written carefully. The dashboard and client SDKs aim to keep frontend developers productive while Postgres remains the source of truth.

Supabase Cloud bills per organization with a Free tier (published quotas include caps such as database storage per project, monthly active users, egress, and function invocations—see supabase.com/pricing and billing docs). Paid plans add higher included quotas, compute for dedicated Postgres, team features, and support. You can also self-host the open-source stack if compliance or cost models require it, at the expense of operating your own control plane.

Supabase fits greenfield web and mobile apps that want auth + data + files + realtime without standing up five vendors. Compare Firebase when you want a Google-centric document model; compare Neon or RDS when you only need managed Postgres without the platform extras; compare Appwrite or PocketBase for self-host-first BaaS alternatives.