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PowerSync
Sync engine (by Journey Mobile) that syncs Postgres/MongoDB/MySQL/SQL Server data into client-side SQLite across many platforms, with writes uploaded through your backend.
www.powersync.com/Active
PowerSync Service v1.27.2 released 2026-10-24; @powersync/web 2.5.0 (Oct 2026) (checked 2026-10-25)
In Local-first
Where it stands apart
- How is the main thing licensed? copyleft or source-available with restrictions (19% of 21 others)
- Do you need an account to use it? optional account (5% of 21 others)
- Which shared standard or format does it mainly build on? SQLite on the client (14% of 21 others)
- Where does synced data live on the server side? in your existing Postgres or other database (19% of 21 others)
- Where does it keep data on the client by default, on its main platform? SQLite (19% of 21 others)
What it shares with most of the community
- Is it actively maintained? active (76% of 21 others)
- How is it mainly sustained? company with a paid product, tier, or ads (62% of 21 others)
- Can it run entirely on your own device or infrastructure, without the maker's servers? yes (81% of 21 others)
- Who is it for? developers (90% of 21 others)
- Does an app built on it keep working fully offline, for both reads and writes? yes, full offline reads and writes (86% of 21 others)
- What does it need to sync between devices? (first that applies) a sync server or relay (yours or hosted) (52% of 21 others)
- If the company behind it disappeared, would apps keep working? yes (81% of 21 others)
- Is end-to-end encryption built in? no (80% of 20 others)
Nearest neighbors
- ElectricSQL 67% of 18 shared answers match
- Zero (Rocicorp) 67% of 18 shared answers match
- Jazz 61% of 18 shared answers match
Every answer
| Question | Answer | Source |
|---|---|---|
| Is it actively maintained? | active PowerSync Service v1.27.2 released 2026-10-24; @powersync/web 2.5.0 (Oct 2026) | 2026-10-25 |
| How is the main thing licensed? | stands apart copyleft or source-available with restrictions v4: from the map's own 'license' question. Service is FSL-1.1-ALv2 (source-available); client SDKs are Apache-2.0/MIT. | source 2026-10-25 |
| How is it mainly sustained? | company with a paid product, tier, or ads v4: from the map's own 'business' question. Journey Mobile, Inc.; PowerSync Cloud plus self-hosted enterprise. | source 2026-10-25 |
| Can it run entirely on your own device or infrastructure, without the maker's servers? | yes v4: from the map's own 'self_host' question. Self-hosted Open Edition of the service. | source 2026-10-25 |
| Do you need an account to use it? | stands apart optional account Self-hosted Open Edition needs no account; Cloud Free plan requires one. | source 2026-10-26 |
| Who is it for? | developers v4: from the map's own 'audience' question. | source 2026-10-25 |
| Which shared standard or format does it mainly build on? | stands apart SQLite on the client Client-side SQLite is the constant across its many backends. | source 2026-10-26 |
| Does an app built on it keep working fully offline, for both reads and writes? | yes, full offline reads and writes | source 2026-10-25 |
| What does it need to sync between devices? (first that applies) | a sync server or relay (yours or hosted) PowerSync Service, hosted (PowerSync Cloud) or self-hosted. | source 2026-10-25 |
| If the company behind it disappeared, would apps keep working? | yes Self-hostable service; FSL converts to Apache-2.0 after two years. Cloud-hosted apps would need to migrate. | source 2026-10-25 |
| Is end-to-end encryption built in? | no Not built in; SQLCipher available for local at-rest encryption. | source 2026-10-25 |
| What shape of data does your app read and write? | relational tables (SQL or a relational query language) | source 2026-10-25 |
| How are concurrent edits resolved? (first that applies) | a server decides (it rebases or rejects client writes) Client uploads writes to your backend, which applies/rejects; default effectively LWW at the backend; custom resolution possible. | source 2026-10-25 |
| Where does synced data live on the server side? | stands apart in your existing Postgres or other database Postgres, MongoDB, MySQL, SQL Server, Azure DocumentDB. | source 2026-10-25 |
| Where does it keep data on the client by default, on its main platform? | stands apart SQLite | source 2026-10-25 |
| How much data syncs to each client? | subsets chosen by queries Sync Rules / Sync Streams define per-user buckets. | source 2026-10-25 |
| Which platforms are first-class? | native SDKs in several languages (Swift, Kotlin, Rust…) JS/web, React Native/Expo, Flutter, Kotlin Multiplatform, Swift, .NET, Node, Rust. | source 2026-10-25 |
| Are auth and permissions built in? | partly or via hooks Verifies JWTs from your auth provider; sync rules scope reads; write permissions in your backend. | source 2026-10-25 |
Sources
This page was derived from:
- GitHub · github.com/powersync-ja/powersync-service · read 2026-10-25
- Web page · docs.powersync.com · read 2026-10-25
- Web page · docs.powersync.com/self-hosting · read 2026-10-25
- Web page · docs.powersync.com/usage/lifecycle-maintenance/handling-update-conflicts · read 2026-10-25
- Web page · www.powersync.com/ · read 2026-10-25
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