SQLite
Embedded single-file databasePublic domain· verified Sep 2026
A full SQL database that lives in one file inside your application, with no server to run. Reads and writes are local disk operations, which makes it extremely fast for single-process workloads.
Official site
Reach for it when
- Desktop apps (Tauri, Electron)
- Mobile apps
- Local caches, prototypes, and tests
Worth knowing
One writer at a time — not a fit for many concurrent writers across servers.