Phoenix Guide Best Databases for Phoenix (2026)
Compare the best database solutions for Phoenix. We review PostgreSQL options with Ecto ORM integration patterns.
Phoenix with Ecto provides powerful database abstractions. We've evaluated managed PostgreSQL services that work excellently with Elixir's concurrency model.
Why This Matters
Ecto is designed for PostgreSQL with excellent support for advanced features. The right database choice affects connection pooling, availability, and developer experience.
Key Considerations
Ecto ORM
Ecto is Phoenix's database library. Changesets, queries, migrations. Works best with PostgreSQL.
Connection Pooling
Ecto uses DBConnection pooling. Configure pool size per environment. Works with external poolers like PgBouncer.
PostgreSQL Features
Ecto supports PostgreSQL arrays, JSON, UUID, ranges. Use database features instead of application code.
Migrations
mix ecto.migrate runs migrations. Use in releases with Release.migrate/0. Ecto handles schema evolution.
Concurrent Operations
Elixir's concurrency works great with database connections. Size pool appropriately for your workload.
Our Recommendations
Neon
Best Serverless Excellent Support Official SDKNeon provides serverless PostgreSQL perfect for Phoenix. Branching for dev/prod. 512MB free. Scales to zero.
Standard Postgrex connection 
Supabase
Best All-in-One Excellent Support Official SDKSupabase PostgreSQL works great with Ecto. 500MB free. Get database plus auth, storage if needed.
Standard Postgrex connection 
Railway
Best with Hosting Excellent Support Official SDKRailway provides PostgreSQL alongside Phoenix hosting. Unified deployment. $5/month credit.
railway add postgresql 
Fly.io
Best with Fly Excellent Support Official SDKFly Postgres for apps on Fly.io. Same region as your app. Good for Phoenix deployments on Fly.
fly pg create 
PostgreSQL
Best Self-Hosted Excellent Support Official SDKSelf-hosted PostgreSQL for full control. Ecto and Postgrex have excellent PostgreSQL support.
mix ecto.create Quick Comparison
| Service | TypeScript | Edge | Free Tier | Setup Time |
|---|---|---|---|---|
| Neon | none | — | 512MB | 5 min |
| Supabase | none | — | 500MB | 5 min |
| Railway | none | — | $5 credit | 5 min |
| Fly.io | none | — | 3 VMs free | 10 min |
| PostgreSQL | none | — | N/A | 30 min |
Quick Start
config :my_app, MyApp.Repo,
url: System.get_env("DATABASE_URL"),
pool_size: String.to_integer(System.get_env("POOL_SIZE") || "10"),
ssl: true,
ssl_opts: [verify: :verify_peer, cacerts: :public_key.cacerts_get()]Common Integration Patterns
Neon + Phoenix
Serverless PostgreSQL with Ecto and automatic migrations.
Fly Postgres + Phoenix
Fly.io managed PostgreSQL with Phoenix app in same region.
Supabase + Realtime
Supabase PostgreSQL with optional realtime subscriptions.