Local-First Data Architecture Puts SQLite in Browsers, Challenging 10 Years of REST
Updated
Updated · InfoWorld · May 12
Local-First Data Architecture Puts SQLite in Browsers, Challenging 10 Years of REST
4 articles · Updated · InfoWorld · May 12
In-browser SQLite running via WebAssembly sits at the center of a local-first web stack that writes data locally first, then syncs changes to the cloud and other devices in the background.
Three components drive the model: a React client with reactive SQL queries, PowerSync as the sync engine, and Supabase Postgres as the database of record with row-level security and per-user sync rules.
Raw SQL replaces fetch-heavy API patterns in the example app: a useQuery subscription re-renders instantly on local or inbound changes, while UPDATE statements complete locally without waiting for a server round trip.
A simple counter demo shows the tradeoff—more setup across Supabase, PowerSync and environment variables, but lag-free interaction, offline continuity and automatic cross-device updates once connectivity returns.
The architecture is framed as a direct alternative to REST and GraphQL for apps needing native-like responsiveness, though traditional JSON APIs still suit simpler dashboards and form-based software.
Is local-first a web revolution, or a complex trend creating more problems than it solves for most apps?
With local-first replacing APIs, what new data conflicts and security vulnerabilities will businesses face?
As AI agents get direct local data access, how can we prevent them from becoming tools for data theft and cyberattacks?