Electric

Current Electric Sync is a read-path engine. It streams Shapes out of PostgreSQL but does not provide a built-in write-path sync or the legacy ElectricSQL bidirectional product model.⁷⁸¹⁰

For: PostgreSQL teams that need live application-specific data subsets without adopting a sync engine that owns the write path

• The product requires the sync engine to accept writes during prolonged offline periods.
• Shape authorization or data selection cannot safely express tenant and revocation boundaries.
• The team cannot own the application write API, optimistic state, rejection, and reconciliation behavior.
• Cloud write and retention economics or self-hosted replication operations do not fit.

• Shape-based read pathShapes define PostgreSQL subsets that are streamed over HTTP to subscribed clients and services.⁷
• Composable writesApplications keep their existing API and can choose online, optimistic, persistent optimistic, or custom write patterns.⁸
• Open deploymentElectric Sync is Apache-2.0 open-source software with self-hosting and Electric Cloud routes.⁷¹⁰

Electric Sync is open-source software with no separate software license fee when self-hosted; infrastructure and operations remain the team's cost. Electric Cloud charges for writes and retention, with additional service cost for Postgres Sync, while reads, egress, fan-out, concurrent users, and delivery are listed as free.⁹

Cloud base meters

Writes and retained data, plus the current Postgres Sync service surcharge⁹

Listed free dimensions

Reads, egress, fan-out, concurrent users, and data delivery⁹

Self-host boundary

Apache-2.0 software plus PostgreSQL, infrastructure, availability, and operations⁹