Edge database
An edge database is a database that runs replicas at the network edge (POPs near users) for low-latency reads — Turso (libSQL / SQLite), Cloudflare D1, Supabase Edge replicas, FaunaDB are 2026 examples.
Edge databases serve queries from POPs near the user instead of one central region, cutting read latency from 100-300ms to under 50ms globally. Architecture options: SQLite replication (Turso libSQL, Cloudflare D1 with the same engine), CRDT-based sync (FaunaDB), per-region read replicas of central Postgres (Supabase). Writes still typically go to a single primary (consistency), reads spread across edges (latency). Best fit: read-heavy apps, global SaaS, content sites with personalization. Worst fit: write-heavy transactional workloads where the primary becomes a bottleneck. By 2026 edge databases are mainstream for consumer SaaS where read latency directly affects engagement.
When to use edge database
- Global read-heavy SaaS.
- Apps with users across continents.
Common mistakes
- Picking edge DB for write-heavy workloads — primary bottleneck cancels the latency benefit.
FAQ
What is edge database?
An edge database is a database that runs replicas at the network edge (POPs near users) for low-latency reads — Turso (libSQL / SQLite), Cloudflare D1, Supabase Edge replicas, FaunaDB are 2026 examples.
When should I use edge database?
Global read-heavy SaaS. Apps with users across continents.
What are the most common mistakes with edge database?
Picking edge DB for write-heavy workloads — primary bottleneck cancels the latency benefit.
Related terms
- Serverless database — A serverless database scales compute and storage independently and bills based on actual use — no fixed instance provisioning — typical of Neon, PlanetScale, Supabase, Convex in 2026.
- Compute / storage separation — Compute / storage separation is the cloud-database architecture where compute (queries) and storage (data) scale independently — letting compute scale to zero while storage stays durable. Neon, Aurora Serverless, Snowflake, BigQuery pioneered this in 2026.
Last updated: 2026-06-01. Raw markdown: https://promtable.com/glossary/edge-database.md.