Choosing Your Database
Your app needs a place to store data. But which database Database An organized collection of structured information, or data, typically stored electronically in a computer system. "Like a giant, super-organized filing cabinet where the app stores all its users, posts, and details."
1The Vibe Stack Pick
Neon PostgreSQL
Vibe StackFor vibe coding Vibe Coding Writing code by describing what you want in natural language and letting AI generate it. You guide the vibe; the AI writes the code. "Like being an architect instead of a bricklayer. You design; the AI builds." Neon Serverless PostgreSQL. A modern database that auto-scales, branches like Git, and has a generous free tier. Perfect for vibe coding. "Like PostgreSQL that wakes up when you need it and sleeps when you don't. Pay for what you use." MCP (Model Context Protocol) A standard for connecting AI to external tools and data sources. Lets Claude access databases, APIs, and services beyond just text. "Like USB ports for AI. A universal way to plug in new capabilities."
AI-First
MCP server gives Claude Code direct database access
Branching
Git-like branches for testing schema changes
Scale-to-Zero
Pay nothing when idle. Perfect for side projects
Why it's the Vibe Stack default: Predictable file structure, transparent reasoning in error messages, and extensive AI training data make Claude Code exceptionally productive with Neon.
2Database Comparison
Neon
Vibe StackServerless PostgreSQL with database branching
Best For
- Next.js projects (especially on platforms like Vercel)
- Cost-sensitive side projects
- Teams wanting dev/staging branches
- AI-assisted development workflows
Key Features
- • PostgreSQL (SQL)
- • Scale-to-zero pricing
- • Git-like database branching
- • MCP server for Claude Code
- • Built-in connection pooling
Free Tier: 512 MB storage, 5 GB data transfer/month
AI Compatibility: Native MCP server
Supabase
PostgreSQL + Auth + Storage + Realtime (all-in-one)
Best For
- Full-stack apps needing auth + DB
- Real-time features (chat, live updates)
- Teams wanting one unified platform
- Rapid MVP development
Key Features
- • PostgreSQL (SQL)
- • Built-in authentication
- • File storage included
- • Real-time subscriptions
- • Edge Functions
Free Tier: 500 MB DB, 1 GB storage, 2 GB bandwidth
AI Compatibility: Good documentation coverage
PlanetScale
Serverless MySQL with schema branching
Best For
- High-scale production apps
- Teams familiar with MySQL
- Complex migration workflows
- Horizontal scaling needs
Key Features
- • MySQL (SQL)
- • Schema branching
- • Non-blocking migrations
- • Horizontal sharding (Vitess)
- • GitHub integration
Free Tier: 5 GB storage, 1 billion row reads/month
AI Compatibility: Standard MySQL support
AWS RDS
Managed relational database (PostgreSQL, MySQL, etc.)
Best For
- Existing AWS infrastructure
- Enterprise compliance requirements
- Predictable resource allocation
- Multi-region high availability
Key Features
- • PostgreSQL, MySQL, MariaDB, etc.
- • Automated backups
- • Multi-AZ deployments
- • Read replicas
- • Deep AWS integration
Free Tier: 750 hrs/month (12 months only)
AI Compatibility: Amazon Q integration
Google Cloud SQL
Fully managed relational database on GCP
Best For
- Google Cloud ecosystem users
- Firebase + Cloud Run projects
- High availability requirements
- Data analytics integration
Key Features
- • PostgreSQL, MySQL, SQL Server
- • Automated backups and replication
- • Point-in-time recovery
- • GCP service integration
- • BigQuery connectivity
Free Tier: $300 credit (90 days), then pay-as-you-go
AI Compatibility: Gemini integration
Firebase Firestore
Real-time NoSQL document database
Best For
- Mobile apps (iOS, Android, Flutter)
- Real-time sync requirements
- Offline-first applications
- Quick MVPs with auth included
Key Features
- • NoSQL document store
- • Real-time listeners
- • Offline support
- • Built-in authentication
- • Google Cloud integration
Free Tier: 1 GB storage, 10 GB bandwidth/month
AI Compatibility: Well-documented for AI tools
3Decision Matrix
Still not sure? Here's a quick decision tree to help you choose:
Pick Neon if...
- You're using Next.js + a deployment platform (like Vercel) and want native integration
- You want database branching for dev/staging/production
- You're building with Claude Code or AI assistants
- You need scale-to-zero pricing for side projects
Pick Supabase if...
- You need database + auth + storage in one platform
- You want real-time subscriptions out of the box
- You prefer an all-in-one backend platform
Pick PlanetScale if...
- Your team already uses MySQL and you want to stick with it
- You need massive horizontal scaling
Pick AWS RDS if...
- Your infrastructure is already on AWS
- You need enterprise compliance features
Pick Google Cloud SQL if...
- Your app runs on Google Cloud Platform
- You use Firebase or Cloud Run
Pick Firebase if...
- You're building a mobile app (iOS, Android, Flutter)
- You need real-time sync and offline support
4Quick Start Resources
Ready to choose?
Start with the Vibe Stack recommendation or explore alternatives that fit your needs.