Convex vs PlanetScale

At a Glance

Convex

PlanetScale

Convex

No features listed.

PlanetScale

Convex

Pros

The reactive query system means your UI automatically updates when data changes without writing any WebSocket or polling code+154
TypeScript end-to-end from database schema to frontend hooks — no API layer to define, no types to duplicate+142
The local development experience with hot reload is the fastest iteration loop I've found for full-stack TypeScript+127
Mutations run as transactions by default, which means you get ACID guarantees without thinking about it+118
Built-in scheduling for background jobs means you don't need a separate queue service for async work+98

Cons

Database

Supabase vs Firebase vs PlanetScale

Database

PlanetScale vs Neon

Database

Supabase vs Neon vs PlanetScale

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Heavy vendor lock-in — the data model and query language are proprietary and migrating away would require a full rewrite+167
Free tier limits are easy to hit in production with a modest user base and the paid jump is steep for early-stage apps+139
The reactivity model is powerful but adds mental complexity — reasoning about what triggers a re-render requires learning new patterns+103
Not a good fit if you need complex SQL-style analytics or reporting — the document model makes aggregations verbose+88

PlanetScale

Pros

Branching model for database schema changes means you never run a raw ALTER TABLE in production again — a game changer for team workflows+183
Zero-downtime schema migrations are solved by default — no more 3am maintenance windows for adding a column+162
Vitess under the hood means it handles enormous write throughput that would kill a vanilla Postgres setup+147
The query insights dashboard identifies slow queries with execution plans before they become production incidents+109

Cons

They killed the free tier in 2024 and the cheapest plan is $39/mo — hard to justify for early-stage projects that might not survive+198
It's MySQL not Postgres, which cuts you off from a huge ecosystem of Postgres-native tools, extensions, and hiring pool+176
Foreign key constraints aren't supported because of the sharding model — you have to enforce referential integrity in application code+152
Prisma support works but you lose some ORM features due to the missing FK support, and you'll hit confusing errors if you're not aware+91