Postgres vs. MySQL / SQLite
Postgres vs MySQL vs SQLite · the 2026 SaaS default
In 2026 Postgres is the default SaaS DB unless you have a specific reason to pick otherwise. Here's when each makes sense.
option APostgresoption BMySQL / SQLiteserviceWebsites, web apps & online shops
→ Verdict
Postgres wins for any SaaS with multi-tenant RLS needs, JSONB, vector support, or geospatial. MySQL still fits high-write simple CRUD. SQLite (via Turso / LibSQL) fits edge-first apps and single-tenant tools.
Pick a topic
When to pick which
A · Pick this when…
Postgres
- 01Multi-tenant SaaS needing RLS
- 02JSON-heavy domain models (JSONB + GIN index)
- 03Full-text search + vector + geo on one DB
- 04Write-heavy but complex query workloads
B · Pick that when…
MySQL / SQLite
- 01Legacy stack already on MySQL (don't migrate for no reason)
- 02Extremely simple CRUD with high writes (MySQL)
- 03Edge-first app with single-tenant + embedded DB (SQLite / Turso)
- 04Local-first app with per-user DB (SQLite)
Factors to weigh
Factor-by-factor
| Factors to weigh | Postgres | MySQL / SQLite |
|---|---|---|
| Multi-tenant RLS | Native, battle-tested | Workarounds / N/A |
| JSON / JSONB | First-class GIN index | MySQL ok, SQLite limited |
| Vector search | pgvector mature | External DB needed |
| Geo (PostGIS) | Gold standard | Weak / none |
| Replication | Logical + physical | Both ok on MySQL, SQLite via Turso |
| Write throughput (simple) | Excellent | MySQL slightly faster for naive bulk writes |
| We recommend | Default for new SaaS | SQLite/Turso for edge + single-tenant |
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