Convex

Convex is a modern backend platform that provides developers with a reactive, realtime database and serverless functions, all written in pure TypeScript, designed to make building full-stack applications dramatically simpler. Traditional backends require stitching together a database, an API layer, realtime infrastructure, and more, each with its own complexity. Convex unifies these into one cohesive, reactive platform where your data updates live across clients automatically and your backend logic is just TypeScript functions — removing huge amounts of boilerplate and letting developers build sophisticated, realtime apps with remarkable ease.

The platform's defining quality is reactivity: when data changes, every part of your app that depends on it updates automatically and in real time, without you having to manage subscriptions, caching, or synchronization manually. You write your backend logic as TypeScript functions that query and mutate the database, and Convex handles the realtime sync, consistency, and scaling. This eliminates a whole category of difficult problems around state management and live data, and combined with end-to-end type safety, it makes building modern, interactive applications far faster and less error-prone. It's especially popular in the React and Next.js ecosystem.

Convex is used by developers and teams building modern, interactive web and mobile applications who want realtime functionality and a great developer experience without backend complexity. The value is simplicity and power together: it removes the hard parts of building realtime, full-stack apps — sync, state, infrastructure — and replaces them with a clean, reactive, type-safe platform. For developers who want to build apps where data is live and collaborative by default, without wrestling with the underlying plumbing, Convex offers a genuinely innovative approach. As modern apps increasingly demand realtime experiences, its reactive backend has won a growing following among developers who value both productivity and capability.