Turso

Turso is a managed SQLite service built on libSQL, an open-source fork of SQLite that adds replication and network access. Each database is a SQLite file, which means the operational model is a file rather than a cluster: small, fast to copy, and trivial to isolate per tenant. Databases can be placed in multiple regions, with one primary accepting writes and read replicas serving queries locally. The embedded replica mode goes further, keeping a local copy inside the application process so reads avoid a network round trip entirely and sync in the background. The appeal is cost and simplicity at high database counts. A multi-tenant product can give every customer their own database without running a fleet of Postgres instances. The constraint is that SQLite is a single-writer system, so write-heavy workloads need the primary and do not benefit from the replica topology.