Pick your free database before the app grows, and know what each free…
Supabase, Convex, Neon with Better Auth or Firebase: four free databases, four different traps ([Instagram reel DeKk5I0Ilbj](https://www.instagram.com/reel/DeKk5I0Ilbj/)). This kit gives you the three-branch rule for choosing before your users live with a provider you did not pick.
Why
You pick a database before the first line of code, not after the first users. You vibe code a weekend project, take whatever database the AI suggests, and three months later your users' accounts live with a provider whose ceiling and trap you do not know. Every free offer cuts something off, and never the same thing: Supabase takes the app offline after a week of inactivity, Firebase stops the service at the ceiling, and on its paid plan budget alerts do not stop the spending: a looping bug gets expensive (Instagram reel DeKk5I0Ilbj). This kit flips the question. You are not looking for the…
When
Phase: build, before you wire the first table. Audience: developers, and PMs or POs who vibe code a real app. ✅ You know it's your kit when You hesitate between two databases and pick on instinct, or because the AI suggested one Your app has user accounts, so the database also carries the login You do not know what happens when you pass the free tier: shutdown, bill, or nothing ❌ Not for this…
Tools included
- Supabase
- Convex
- Neon
- Better Auth
- Firebase