PowerSync

PowerSync provides an open-source and source-available synchronization engine that connects existing backend databases to client-side SQLite. It supports Postgres, MongoDB, MySQL, SQL Server, and Azure DocumentDB, helping developers build fast, real-time applications for web, mobile, desktop, embedded systems, and software agents without replacing their current database.

The platform combines a service that tracks backend database changes with client SDKs that maintain local SQLite data. Developers can define Sync Streams so each client receives only the data it needs. Changes are streamed in real time, while local reads and writes enable responsive interfaces and support offline or network-resilient use. Client-side writes are queued for upload, with developers retaining control over how those changes are applied through their backend API.

PowerSync also offers live queries, automatic partial synchronization, consistency guarantees, and support for schema evolution. Customers can use PowerSync Cloud or self-host the service, and can explore documentation, release notes, a roadmap, demos, and developer resources.