Do not choose by storage alone
Free storage is only one boundary. For real apps, connection limits, cold starts, backups, egress, query performance, and upgrade pricing usually matter more than the first few hundred megabytes.
Free Database Hosting Comparison
Best Free Relational Databases (SQL) 2026 | Free Tier Comparison
Free database hosting is not just about storage. The practical choice depends on your data model, connection pattern, backup needs, serverless runtime, and how painful it would be if the free project sleeps or pauses.
Fast answer
Choose Neon for focused serverless Postgres.
Choose Supabase when Auth and Storage are part of the backend.
Use Upstash as an edge cache or coordination layer, not your only database.
Last Updated: 2026-05-22
Quick recommendations
These picks are grouped by developer intent. The best free database is the one that matches your runtime and recovery needs, not simply the biggest quota.
Best serverless Postgres starting point
Neon
Use Neon when you mainly need a Postgres database, branching, and scale-to-zero behavior without a full app backend platform.
Best Postgres + Auth bundle
Supabase
Use Supabase when your database choice is tied to auth, storage, realtime subscriptions, and a browser-based admin experience.
Best document database sandbox
MongoDB Atlas
Use MongoDB Atlas when your model is document-first and your team already knows the MongoDB query and aggregation ecosystem.
Best Redis-style edge companion
Upstash
Use Upstash when you need rate limiting, queues, counters, or low-friction Redis access from serverless and edge runtimes.
Free database comparison table
Use this table for fast scanning, then read the selection notes below before building a production path around a free tier.
| PROVIDER | FREE STORAGE | MONTHLY BANDWIDTH | SPECS / COMPUTE | CONNECTION LIMITS | KEY CONSTRAINTS | ACTION |
|---|---|---|---|---|---|---|
Neon PostgresSERVERLESS POSTGRES | 0.5 GB / Project | 100 CU-Hours / mo (Scale-to-Zero auto-metered) | Includes Neon Auth (60k MAU free), 5-min inactivity sleep | Dynamic pool scaling | 300ms-500ms cold start delay when waking up from zero-scale | Go to Site ↗ |
SupabasePOSTGRES BACKEND | 500 MB / 2 Projects | 50k MAU Auth, 1GB File Storage bundled | Realtime API extensions, standard managed PG cluster | Fixed direct TCP limits + PgBouncer pooler | 7-day inactivity pause policy; database completely frozen until manual wake | Go to Site ↗ |
MongoDB Atlas (M0)DOCUMENT NOSQL | 512 MB Fixed | 10GB In / 10GB Out rolling 7-day quota | 3-node replica set shared cluster on AWS/GCP/Azure | Hard cap at 500 concurrent connections maximum | Max 500 connections prone to exhaustion via serverless runtime hits without proxies | Go to Site ↗ |
Upstash RedisSERVERLESS REDIS / KV | 256 MB In-Memory | 500k Commands / Month + 200GB free bandwidth | Native REST HTTP API perfect for Edge Runtimes (Cloudflare Workers) | Connectionless REST execution pool | Commands capped at 500k/mo; usage peaks will overflow to usage billing | Go to Site ↗ |
How to choose a free database
Match database shape to product shape
Choose Postgres for relational workflows, reporting, permissions, and portability. Choose document or Redis-style tools when the data is flexible, temporary, event-shaped, or cache-heavy.
Treat serverless connections as a design constraint
Serverless functions can open many short-lived database connections. Use poolers, HTTP APIs, or edge-friendly clients before traffic spikes expose connection exhaustion.
Know your recovery story
A free database is useful for prototypes, but production needs exports, backups, restore options, and a plan for accidental deletes or failed migrations.
Database free-tier traps
Connection exhaustion
Small database tiers can fail under bursty serverless traffic even when storage is tiny. Pooling strategy matters before the app looks large.
Cold starts and pause behavior
Scale-to-zero saves money, but it can add wake-up latency. Inactive-project pauses are fine for demos, less fine for public tools and customer-facing dashboards.
No automatic production safety
Free tiers often omit point-in-time recovery, longer log retention, support, or guaranteed uptime. Use them deliberately, not accidentally.
Cache is not a database replacement
Redis-like services are excellent for speed and coordination, but they should not quietly become your only durable system of record.
Recommended database stack patterns
Next.js + Neon + Clerk
A clean SQL-first SaaS stack: Vercel or another frontend host, Neon for Postgres, and Clerk for auth when you want separation of concerns.
Cloudflare Pages + Supabase
A compact MVP stack: Cloudflare hosts the frontend, Supabase handles Postgres, Auth, Storage, and lightweight backend glue.
Workers + Upstash Redis
A practical edge pattern for rate limits, counters, queues, and API middleware that should not open TCP database connections.
Related guides and categories
Provider guide
Supabase Provider Guide
A deeper look at Supabase Free, including Postgres, Auth, Storage, Edge Functions, Realtime, and free-plan caveats.
Related category
BaaS Free Tier Comparison
Compare database-plus-auth backends when you want more than a standalone database.
Related category
Serverless Functions
Understand the function runtime side of database connections, webhooks, jobs, and edge APIs.
Free database FAQ
What is the best free Postgres hosting option?+
Neon is strong when you want serverless Postgres and branching. Supabase is stronger when you also need Auth, Storage, Realtime, and a broader backend platform. The best choice depends on whether you need only a database or a full app backend.
Can I run production on a free database tier?+
You can for low-risk early projects, but production should verify backups, recovery, connection limits, pause behavior, region choice, monitoring, and upgrade cost before real users depend on it.
Why do serverless apps hit database connection limits?+
Serverless runtimes scale by starting many isolated invocations. If each invocation opens a direct database connection, connection counts can spike much faster than request volume suggests.
Should I use Redis or Postgres for a small free-tier app?+
Use Postgres for durable records, relationships, and queries. Use Redis-style services for cache, rate limits, ephemeral state, queues, counters, and edge-friendly coordination.
What should I check before choosing a free database?+
Check storage, egress, connection limits, backups, pause behavior, import/export support, regions, upgrade pricing, and how the client connects from your hosting environment.