Supabase vs Postgres: Which MCP should you use?
Supabase
Open-source Firebase alternative on Postgres
Postgres
The world's most advanced open-source relational DB
TL;DR
Supabase is managed Postgres plus auth, storage, edge functions, and realtime. Plain Postgres gives you the same battle-tested engine without the batteries — you run it yourself. Supabase wins for speed-to-product; Postgres wins for full control and cost at scale.
Pick Supabase
Pick Supabase when you want a managed Postgres with auth, storage, and realtime ready in minutes.
Pick Postgres
Pick Postgres when you need self-hosting, strict compliance control, or cheaper unit economics at scale.
Feature-by-feature comparison
| Feature | 🟢Supabase | 🐘Postgres | Winner |
|---|---|---|---|
| Hosting model | Managed SaaS (self-host available) | You run it (any cloud or on-prem) | Tie |
| Built-in auth | Yes — GoTrue + RLS | No — bring your own | A |
| Realtime subscriptions | Yes — native | LISTEN/NOTIFY (DIY) | A |
| SQL dialect | Postgres 15/16 | Postgres (latest) | Tie |
| Row-Level Security | Default pattern | Supported, manual setup | A |
| Pricing at scale | Predictable tiers, egress billed | Only infra cost | B |
| Vendor lock-in | Low — standard Postgres | None | B |
| Time to first query | ~2 minutes | ~20 minutes (Docker) | A |
Hosting model
TieSupabase
Managed SaaS (self-host available)
Postgres
You run it (any cloud or on-prem)
Built-in auth
ASupabase
Yes — GoTrue + RLS
Postgres
No — bring your own
Realtime subscriptions
ASupabase
Yes — native
Postgres
LISTEN/NOTIFY (DIY)
SQL dialect
TieSupabase
Postgres 15/16
Postgres
Postgres (latest)
Row-Level Security
ASupabase
Default pattern
Postgres
Supported, manual setup
Pricing at scale
BSupabase
Predictable tiers, egress billed
Postgres
Only infra cost
Vendor lock-in
BSupabase
Low — standard Postgres
Postgres
None
Time to first query
ASupabase
~2 minutes
Postgres
~20 minutes (Docker)
Best for
Supabase
- Built-in auth: Yes — GoTrue + RLS
- Realtime subscriptions: Yes — native
- Row-Level Security: Default pattern
- Time to first query: ~2 minutes
Best for
Postgres
- Pricing at scale: Only infra cost
- Vendor lock-in: None
Migration path
Supabase is standard Postgres, so pg_dump/pg_restore works both ways. To move off Supabase: pg_dump --no-owner --no-acl, then restore to your new Postgres; rewrite RLS policies if you replace Supabase auth. To move onto Supabase: dump your DB, supabase db push, then add RLS policies for user-scoped tables.
Frequently asked questions
What is the main difference between Supabase and Postgres?
Supabase is managed Postgres plus auth, storage, edge functions, and realtime. Plain Postgres gives you the same battle-tested engine without the batteries — you run it yourself. Supabase wins for speed-to-product; Postgres wins for full control and cost at scale. In short: Supabase — Open-source Firebase alternative on Postgres. Postgres — The world's most advanced open-source relational DB.
When should I pick Supabase over Postgres?
Pick Supabase when you want a managed Postgres with auth, storage, and realtime ready in minutes.
When should I pick Postgres over Supabase?
Pick Postgres when you need self-hosting, strict compliance control, or cheaper unit economics at scale.
Can I migrate from one to the other?
Supabase is standard Postgres, so pg_dump/pg_restore works both ways. To move off Supabase: pg_dump --no-owner --no-acl, then restore to your new Postgres; rewrite RLS policies if you replace Supabase auth. To move onto Supabase: dump your DB, supabase db push, then add RLS policies for user-scoped tables.
Do Supabase and Postgres both work with MCP-compatible AI agents?
Yes. Both have MCP servers installable via MCPizy (mcpizy install supabase and mcpizy install postgres). They work identically across Claude Code, Claude Desktop, Cursor, Windsurf, and any other MCP-compatible client. You can install both side by side and route queries in your agent's prompt.
More Database comparisons
Supabase vs Firebase
Both are BaaS offerings. Supabase is Postgres-based (relational, SQL, open-source), Firebase is Firestore-based (NoSQL, proprietary, Google Cloud). Supabase wins if you want SQL, lower lock-in, and predictable pricing. Firebase wins for mobile-first apps tied to Google's ecosystem.
Postgres vs MySQL
Both are mature open-source relational databases. Postgres has richer SQL (CTEs, window functions, JSON, arrays, extensions), stricter standards compliance, and better for complex analytics. MySQL is simpler, often faster on basic read-heavy workloads, and dominates WordPress/PHP ecosystems.
MongoDB vs Postgres
MongoDB is a document database — flexible schemas, built-in sharding, great for unstructured data and rapid prototyping. Postgres is relational but its JSONB type covers most 'flexible schema' use-cases while also giving you joins, transactions, and stricter integrity.
Install both with MCPizy
Not sure? Run both side by side — swap between them in your AI agent with a single config line.