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Every Kazzle app is self-contained. Infrastructure is provisioned automatically — you just describe what you want and the AI picks the right pieces.

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The stack

Each layer is opt-in. A landing page uses none of this. A realtime collaborative app might use all of it.
LayerTechnologyWhat it does
DatabaseNeon PostgresDedicated, scale-to-zero instances
ORMDrizzle ORMType-safe queries and migrations
Realtime syncPowerSyncLocal-first reads, automatic sync
AuthBetter AuthSelf-hosted, runs in your app
Ephemeral dataUpstash RedisPresence, typing indicators, cursors
HostingFly.ioAutomatic deploys with live URLs

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Database

Ask the AI to add a database and it provisions a Neon Postgres instance. Schema is managed through Drizzle ORM — the AI writes migrations, commits them, and they run automatically. See Databases for the full workflow.

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Realtime sync

For apps that need instant reads and offline support, the AI sets up PowerSync — a sync layer between Postgres and a local SQLite database in the browser. Users never wait for network. Data is always available locally. See Realtime & Offline-First Apps for architecture and patterns.

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Auth

Better Auth runs inside your app’s process component. The AI sets up email/password auth, session management, and wires it into PowerSync if sync is enabled. Users get their own data, scoped by user ID in sync rules.

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Ephemeral realtime

For things that don’t need persistence — typing indicators, live cursors, presence — the AI uses Upstash Redis pub/sub. Lightweight, no schema needed.

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Architecture

┌─────────────────────────────────────────────┐
│ UI Component (browser)                      │
│  ├── PowerSync client (local SQLite)        │
│  ├── Better Auth client (session)           │
│  └── React app                              │
├─────────────────────────────────────────────┤
│ Process Component (server)                  │
│  ├── GET /api/powersync/token  (JWT signing)│
│  ├── POST /api/sync            (CRUD upload)│
│  ├── /api/auth/*               (Better Auth)│
│  ├── Migration runner          (schema mgmt)│
│  └── Sync rule updater         (admin API)  │
├─────────────────────────────────────────────┤
│ Infrastructure (provisioned by Kazzle)      │
│  ├── Neon Postgres                          │
│  ├── PowerSync on Fly.io                    │
│  └── Upstash Redis (opt-in)                 │
└─────────────────────────────────────────────┘
Not every app needs all of this. A landing page is just the UI component. An API service is just the process component. The AI picks what’s needed based on what you ask for.