14 expert Turso Edge Database answers researched from official documentation. Every answer cites authoritative sources you can verify.
Read latency: sub-10ms globally via edge replication. Write latency: 20-100ms (depends on primary region distance). Replication lag: 1-50ms. No cold start overhead (embedded database). Query performance: SQLite-level (microseconds for indexed queries). Concurrent connections: 1000+ per edge location.
Use Turso for: (1) Global applications needing sub-10ms reads worldwide, (2) Database-per-tenant SaaS with hundreds/thousands of tenants, (3) Edge functions/serverless with WASM, (4) Read-heavy workloads with occasional writes, (5) Applications requiring SQLite compatibility at scale. Avoid for: write-heavy workloads requiring strong consistency, complex distributed transactions, or analytics on large datasets.
Schema changes applied to primary region, then automatically propagate to all edge regions within 1-50ms. Use turso db schema push for migrations. Supports both synchronous (wait for replication) and asynchronous modes. Recommended: apply migrations during low-traffic windows to minimize inconsistency window.
SQLite-based edge database with global replication (2025). Built on libSQL (open-source SQLite fork) that combines SQLite's embedded simplicity with distributed edge deployment. Primary database runs in home region, with automatic multi-region replication to edge locations via Fly.io infrastructure.
$4.99/month Developer plan supports unlimited databases with 500 monthly active database limit. Enables database-per-tenant multi-tenancy at massive scale: 1000 tenants = 1000 databases = $4.99/month if ≤500 active concurrently. Competitors: PlanetScale $5/database single-node entry, Neon Launch $19/month for 100 projects.
Automatic daily backups for all databases (retained 7 days on Developer plan). Point-in-time recovery available on higher tiers. Manual snapshots via turso db snapshot create. Restore via turso db restore. Multi-region replication provides inherent disaster recovery (data replicated to multiple edge locations).
All writes go to primary region, then asynchronously replicate to edge regions (eventual consistency). Sync lag: 1-50ms between regions. For strong consistency, query primary region directly. For read-heavy workloads, edge reads with eventual consistency are recommended.
Automatic multi-region replication: create database, select regions (US-East, EU-West, Asia-Pacific), Turso replicates to all via Fly.io infrastructure (hundreds of edge locations). Reads served from nearest edge with sub-10ms latency globally. Write propagation uses eventual consistency with 1-50ms sync lag between regions.
Native SDKs for serverless: TypeScript/JavaScript (Cloudflare Workers, Vercel Edge, Deno Deploy), Python (AWS Lambda), Go, Rust. WASM support for WebAssembly runtimes. HTTP/WebSocket protocol (no TCP connection required). Edge-optimized with connection pooling built-in. Zero cold start impact due to embedded architecture.
Dashboard metrics: database size, row reads/writes, active connections, replication lag per region. CLI commands: turso db inspect, turso db show. API access to metrics via HTTP. Alerts for quota limits (storage, reads, writes). No built-in APM or query profiling (use SQLite EXPLAIN QUERY PLAN locally).
Turso: $4.99/month for unlimited databases (500 active limit) = database-per-tenant at scale. PlanetScale: $5/database minimum = $5000/month for 1000 tenants. For 100+ tenant applications, Turso is 100-1000x cheaper for database-per-tenant architecture.
Embedded database with no separate server process, runs in-process with application. Zero cold start overhead (no connection pool warmup). 141KB binary footprint. Native WASM support for edge functions. Schema-first with strong typing. Full SQL support (JOIN, transactions, triggers, foreign keys). Transactional guarantees (ACID).
Open-source fork of SQLite with extensions for distributed edge deployment. Adds HTTP/WebSocket protocol support, native replication, and edge-optimized features. Maintains 100% SQLite compatibility while enabling global distribution. Apache 2.0 licensed.
$4.99/month includes: unlimited databases (500 monthly active), 9GB total storage across all databases, 1 billion row reads/month, 25 million row writes/month, 500 databases active concurrently. Free tier: 3 databases, 1GB storage, 1 billion row reads.