Upstash vs Firebase

At a Glance

Upstash

Firebase

Upstash

No features listed.

Firebase

Upstash

No data available.

Firebase

Pros

The free Spark plan is surprisingly capable and you can prototype an entire app without a credit card+156
Realtime database sync across clients is dead simple and the SDK handles reconnection and offline state for you+143

Database

Supabase vs Firebase

Database

Supabase vs Firebase vs PlanetScale

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Cons

Vendor lock-in is severe — the client SDK is so deeply embedded in your app that migrating away took my team two full weeks+199
NoSQL Firestore makes complex queries painful — I rewrote a feature three times trying to avoid needing a proper join+189
Pricing can spike unexpectedly because reads are charged per document, and a single inefficient query can cost dollars instead of cents+176
There's no way to do schema migrations or version your data model, so evolving your data structure over time is a manual nightmare+134
Cloud Functions cold starts on the free tier are often 3-5 seconds, which makes them useless for user-facing request handlers+118