Convex Has a Free Backend API — Here's Why Developers Are Ditching Firebase

What if your database automatically synced with your frontend in real-time — no WebSockets, no cache invalidation, no state management libraries? That's Convex. And it has a generous free tier. What is Convex? Convex is a reactive backend platform that replaces your database, server functions, and real-time infrastructure with a single service. Write your backend in TypeScript, and everything just works. Why Developers Are Moving to Convex 1. Real-Time by Default // This query automatically updates the UI when data changes import { query } from " ./_generated/server " ; export const getMessages = query ({ handler : async ( ctx ) => { return await ctx . db . query ( " messages " ). order ( " desc " ). take ( 50 ); }, }); // React component — automatically re-renders on data changes function Chat () { const messages = useQuery ( api . messages . getMessages ); return messages ?. map ( m => < Message key = { m . _id } { ... m } />); } No WebSocket setup. No polling. No cache invalidation.