Choosing a database library in Rust is about understanding the trade-offs between control, safety, and convenience. The ecosystem offers a range of options, from high-level ORMs to low-level drivers.
Database → Library Options
| Database |
Library Options |
| PostgreSQL |
Diesel, Diesel-async, SQLx, SeaORM, SeaQuery, Toasty |
| MySQL |
Diesel, Diesel-async, SQLx, SeaORM, SeaQuery, Toasty |
| SQLite |
Diesel, Diesel-async, SQLx, SeaORM, SeaQuery, Toasty |
| Turso |
Toasty |
| MongoDB |
Official MongoDB Rust driver |
| DynamoDB |
AWS SDK for Rust, Toasty, Dynarust |
Choosing a Library
|
diesel |
diesel-async |
sqlx |
seaquery |
toasty |
seaorm |
| Query builder |
✅ |
✅ |
⛔ (manual strings) |
✅ |
✅ |
✅ |
| Type-safe queries |
✅ |
✅ |
✅ |
⛔ (no compile-time schema check) |
🟡 schema/migrations from struct |
✅ |
| Dynamic queries |
🟡 depends |
🟡 depends |
✅ |
✅ |
✅ |
🟡 depends |
| Async |
⛔ |
✅ |
✅ |
✅ |
✅ |
✅ |
| Performance |
🟡 depends |
✅ often good |
✅ often good |
✅ often good |
✅ often good |
✅ often good |
- Diesel — Compile-time query validation and safety. Synchronous by default, use
diesel-async for async.
- SQLx — Async SQL toolkit with compile-time checked raw SQL. Maximum control, no query builder.
- SeaQuery — Standalone query builder. Good for dynamic queries where schema isn’t known at compile time.
- Toasty — Only library with Turso support. Supports SQL and NoSQL (DynamoDB).
- SeaORM — Async-first ORM built on sqlx. Productivity-focused, familiar to Django/Rails devs.
Connection Pooling
| Library |
Notes |
| deadpool |
Dead-simple async connection pool |
| r2d2 |
Generic pool, often used with sync drivers |
