Sync Postgres with SQLite

Avoid the complexities of using APIs to move app state over the network. Get super-fast, always-available offline-first/local-first apps.

Postgres
In-app SQLite
See installation steps for these Postgres hosting providers

Add real-time sync to Postgres

PowerSync streams Postgres changes to clients in real-time, so apps can query and mutate local SQLite without waiting on the network.

Sync Rules handle partial syncing under the hood, giving every user just the data they need.
Backend
PowerSync Service
Clients
Postgres
Logical
replication
Sync Rules
WebSocket or
HTTP stream
SQLite
SQLite
POSTGRES, meet SQLite

How data syncs from Postgres to in-app SQLite

Privilege-scoped connection

PowerSync connects to your Postgres database over TCP with read access to all synced tables and permissions to consume logical replication slots.

Publication filter

A logical replication publication is created, including the tables referenced in your Sync Rules.

Low maintenance

PowerSync automatically handles most schema change scenarios in Postgres, with no need for client-side migrations.

Postgres
Write-Ahead Log (WAL)
Logical replication
Replication via WAL

PowerSync consumes a logical replication slot to detect row-level INSERT, UPDATE, and DELETE operations in Postgres.

Logical replication messages
Operation history tracked

The PowerSync Service tracks changes to data in the buckets, allowing for efficient delta syncing to clients.

PowerSync Service
Sync Rules
Sync Rules for partial replication

You define Sync Rules which determine which data is synced to which users. Data is grouped into buckets which can be shared between users to avoid duplication.

WebSocket or HTTP stream
Authentication using JWTs

Clients authenticate against the PowerSync Service using JWTs.

Real-time sync

The client SDK initially downloads all relevant data and then incrementally keeps it updated, in real time.

Offline-first, including local writes

Writes are immediately applied locally, and queued for upload to your backend API. The PowerSync client SDK automatically handles failures and retries.

PowerSync Client SDK
In-app SQLite
App data tables
Upload queue
Full database on the client-side

On the client, data is persisted to a SQLite database in schemaless format. The application defines a client-side schema which is applied as SQLite views for easy structured querying.

Reactive queries

Live reactive queries can be used to update the UI when data changes.

Strong consistency guarantees

PowerSync uses a server-authoritative architecture with a checkpoint system to guarantee consistency.

Control over the write path

Your backend accepts uploaded writes and then applies them to your Postgres database.

Backend API
Postgres
Write-Ahead Log (WAL)
Logical replication
Logical replication messages
PowerSync Service
Sync Rules
WebSocket or HTTP stream
PowerSync Client SDK
In-app SQLite
App data tables
Upload queue
Backend API
See installation instructions:
Source database setup

Highly scalable and enterprise-ready

Horizontally scalable

AWS VPC Endpoints available in Cloud

Sharded database support

Coming soon
See pricing

Implement Postgres
& SQLite sync today

Self-hosted PowerSync
Self-host PowerSync