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PostgreSQL vs Supabase for Founder MVPs

A neutral comparison for first-time SaaS builds — when managed Postgres plus auth is enough, and when you need more.

TL;DR: Both are PostgreSQL under the hood. Supabase is faster to bootstrap (auth, storage, dashboard). Plain Postgres + NextAuth gives you more control and simpler mental model for fixed-scope MVPs. We default to PostgreSQL + NextAuth on every ShipInADay build.


Founders ask whether they need Supabase on day one. The honest answer: you need a relational database and a clear ownership model — the brand on the box matters less than scope.

What Supabase adds

  • Hosted Postgres with a nice dashboard
  • Built-in auth, storage, and realtime subscriptions
  • Client SDKs that feel like Firebase for SQL
  • Fast prototypes when your team already knows the stack

What plain PostgreSQL adds

  • No vendor-specific SDK lock-in on day one
  • Standard SQL migrations you can run anywhere (OVH, RDS, Neon, etc.)
  • Pairs cleanly with NextAuth for session + OAuth in Next.js
  • Easier to reason about in a 24-hour fixed scope

Comparison for MVP stage

NeedSupabasePostgres + NextAuth
User accountsBuilt-inNextAuth + users table
Row-level securityNative policiesApp-layer checks (our default)
File uploadsStorage bucketS3/R2 when needed
RealtimeBuilt-inDefer unless core to v1
PortabilityGood SQL exportExcellent — it's just Postgres

Our default (and why)

Every Launch and Scale tier ships with:

  • PostgreSQL 16
  • NextAuth (Google + credentials)
  • Migrations in-repo (database/migrations/)
  • user_id ownership on project data — no email-only access

That stack answers 90% of founder MVPs without adding a BaaS dependency on day one.

When we recommend Supabase instead

  • You already have Supabase in production and need a fast extension
  • Realtime collaboration is the product (not a nice-to-have)
  • Your team has zero backend capacity and wants the dashboard on day one

Custom tier projects can integrate Supabase when it is explicitly in scope.

FAQ

Can I migrate from Supabase later?
Yes — it's PostgreSQL. Plan for auth migration (sessions, user IDs) as the hard part, not the data.

Do you host the database?
We deploy your MVP with a defined hosting path; production DB strategy is documented at handoff.

Next step

Pick a tier, read what to prepare, and start your request.

Ready to ship your MVP?

Start your project