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Escape the network tarpit
Automatically sync your backend database with in-app SQLite.
Avoid the complexities of using APIs to move app state over the network.
Backend Database
In-app SQLite
SYNC MADE SIMPLE
What is PowerSync?
PowerSync is a sync engine that consists of two components: a service that enables high-scalability partial data syncing and a set of client SDKs that manage client-side persistence, consistency, reactivity and syncing write operations back.
Backend
database
PowerSync
Service
Backend API
PowerSync SDK
In-app
SQLite
auto-synced
real-time
reactive
Server-side
State transfer managed for you
Client-side
Fast, reactive, local-first apps
BRING YOUR OWN backend, sync with SQLite
A sync engine built to use powerful open tech
Connect the most capable open database technologies: Postgres, MySQL, MongoDB or SQL Server on the backend and SQLite on the client-side.
PowerSync itself is also open-source and source-available.
SYNC ENGINES ENABLE INSTANTLY-RESPONSIVE USER EXPERIENCES
Today’s best apps use sync
Syncing apps provide an unmatched user experience: app interactions are instant, data updates fan out to all users in real-time, and apps are always available — even while offline.
AVOID GETTING BOGGED DOWN IN STATE MANAGEMENT
Make app dev more fun
Sync engines change the way data flows between client and server, taking the network off the user interaction path and cutting complexity.
Stop spending energy on micromanaging data and network calls, and let the sync engine take care of state transfer and state management for you.
Network tarpit
Backend
API
network failure handling
state management
retries
cache invalidation
optimistic updates
loading state
Backend
Synced in background
In-app SQLite
Backend DATABASE, meet SQLite
How PowerSync works
On the backend
Backend database
1
The PowerSync Service connects to your source database.
PowerSync is non-invasive to your backend database, with minimal permissions required.
[
Learn more
](https://docs.powersync.com/intro/powersync-philosophy#simplicity)
Change stream
2
The PowerSync Service continuously replicates data by tracking changes in the source database.
PowerSync Service
Partial sync
3
Data is dynamically partitioned with Sync Streams you define, giving each user just the data they need.
Real-time streaming
4
Updates are streamed to clients in real-time.
The PowerSync Service elastically scales horizontally to large numbers of concurrent clients.
In your client app
PowerSync Client SDK
In-app SQLite
App data tables
Upload queue
5
6
The PowerSync client SDK keeps an in-app SQLite database updated, enabling full offline-first functionality.
PowerSync uses JWTs for authentication.
[
Learn more
](https://docs.powersync.com/installation/authentication-setup)
Writes are applied locally, and queued for upload to your backend API.
You have full control over logic for applying writes to your backend database.
[
Learn more
](https://docs.powersync.com/installation/app-backend-setup/writing-client-changes)
On the backend
Backend
API
Live demo app
React Multi-Client Demo App (PowerSync + Supabase)
Implement sync today
PowerSync Cloud
Self-hosted PowerSync
Join thousands of developers using PowerSync
“PowerSync is really bulletproof — every single kind of interaction that you might have with the data, it’s got covered.”
Tyler Shukert
Supabase
“Combining Riverpod, Drift, and PowerSync creates a powerful stack that makes local-first development approachable. You can focus on building features rather than wrestling with complex sync logic.”
Dinko Marinac
Dinko Marinac’s Blog
“Been playing with PowerSync recently - it’s amazing and straightfoward after you get an understanding of their architecture and min concepts which is not that hard. Also fully open source and you can self-host. It’s in its early days but team on discord is extremely helpful.”
Bhodan Khodakivskyi
fomr.io
“It’s been a long-time dream of mine to eliminate all client state management with queries to a local DB. This is probably the closest thing I’ve seen to that vision.”
Ev Haus
ZenHub
“As a developer, this feels like a game-changer: I get incredibly robust data sync with LESS code.”
Carl Kritzinger
Intuitably
“I’m using @powersync_ to sync data to sqlite wasm in the browser. Magic.”
Zane Thomas
“The number of people I talk to about PowerSync on a daily basis 😂 It reminds me of the advertising I used to do for Glassy, so much so that people would ask me if I’d invested in it.”
Steve Nosse
BeFit
“The main reason we chose PowerSync is that it perfectly fits our need for an offline-first architecture. Before discovering it, we hadn’t come across any other solutions that offered a robust offline-first sync option.”
Andy Geers
PrayerMate
“PowerSync makes it easy to set up local-first without messing up the architecture of the rest of your system.”
Simon Grimm
Galaxies.dev
“Smooth cross-platform syncing feels like magic on @orakemu. Works great offline too. Thanks to @powersync_”
Yorgo Hoebeke
Orakemu
“I built recall.plus offline-first with @powersync_ - game changer from a UX perspective as the latency between user actions and the local db is almost non-existent.”
Martin Dyz
recall.plus
“Lately, I’ve been working on a project that combines Supabase, PowerSync, and Flutter. The results so far? Absolutely game-changing! This stack makes it so much easier to handle offline-first functionality without overcomplicating the architecture.”
Álvaro Carillo Rumpel
Mobile Engineer
“Integrated @powersync_ into an experimental branch of @HabitKit. Setup was pretty easy and fast. Really love the developer experience and I’m amazed how good it works 🤩”
Sebastian Röhl
HabitKit
“Building with a sync engine like @powersync_ means I get instant reactivity for free, without having to write repetitive boilerplate code to manage websockets and API endpoints.”
George Jose
Titan Gym App
“Finally, my offline first app with @supabase + @powersync_ is live! I used to use @realm and switched to @powersync_ this time, so far so good! Excited to see how will be on production 💪”
Minho Ko
nomadwallet.app
“I have a project that I am currently working and testing with @powersync_. It’s working flawlessly…”
Marco Napoli
Jedi Pixels
Explore the PowerSync community
Blog
We post about product updates, announcements and interesting engineering challenges we’ve faced.Read blog posts
[
](https://www.powersync.com/blog)
Discord
2K+ MEMBERS
Join the PowerSync Discord server to get support, talk to our engineering team and share what you’ve built.Join the server
[
](https://discord.gg/powersync)
GitHub
1.8K STARS
View the repositories of our client SDKs, the server-side PowerSync Service and other packages.View repositories
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