Convex
Reactive TypeScript backend database.
Convex · open source · checked Oct 22, 2026
What it is
Convex is a reactive database + backend where queries, mutations and actions are TypeScript functions; live updates by default. Very agent-friendly because everything is code.
Use cases
- →Realtime apps
- →TypeScript-only stacks
- →AI agents writing backend code end-to-end
Pros
- +Backend is just TypeScript: great for AI agents
- +Realtime by default
- +Generous free tier
Cons
- −Not SQL/Postgres
- −Platform-specific model
Where it ranks
- #2 Best Backend & Database for Vibe Coders
Backend is pure TypeScript, so agents can write and reason about it end to end; realtime by default.
Compare Convex
FAQ
How much does Convex cost?
Free & Starter $0 + pay as you go. Professional $25/developer/mo. Enterprise $2,500/mo minimum. (As checked on 2026-10-22; confirm on https://www.convex.dev/pricing.)
What is Convex best for?
#2 in Best Backend & Database for Vibe Coders: TypeScript apps built mostly by agents.
What are the best alternatives to Convex?
Supabase (Postgres backend: database, auth, storage, edge functions); Firebase (Google's app backend: Firestore, auth, hosting, functions); Neon (Serverless Postgres with branching, auth, and realtime (beta)).
Is Convex open source?
Yes, Convex is open source (or has an open-source core).