Electric SQL Has Free Local-First Sync — Build Offline-First Apps with Postgres and SQLite

Why Electric SQL?

Electric SQL syncs Postgres to local SQLite databases. Your app works offline, syncs when reconnected — no conflict resolution code needed.

How It Works

1. Your Postgres database is the source of truth
2. Electric syncs subsets of data to client-side SQLite
3. Users read/write to local SQLite (instant, offline-capable)
4. Electric handles sync, conflict resolution, consistency

Quick Start

import { electrify } from 'electric-sql/wa-sqlite'
import { schema } from './generated/client'

const electric = await electrify(db, schema, config)

// Subscribe to data shape
await electric.db.items.sync({ where: { project_id: myProjectId } })

// Read (from local SQLite — instant)
const items = await electric.db.items.findMany()

// Write (to local SQLite — instant, syncs later)
await electric.db.items.create({ data: { title: 'New Item', done: false } })

Why Local-First?

• Instant: Reads/writes hit local SQLite, not network
• Offline: App works without internet
• Multiplayer: Changes sync to all clients
• Resilient: No loading states, no network errors

Local-First vs Traditional

Aspect	Local-First	Client-Server
Latency	0ms (local)	50-500ms
Offline	Full	None
Sync	Automatic	Manual
Conflicts	CRDT-based	Manual

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