Replit AI

Replit AI (formerly Ghostwriter) is the AI coding layer inside Replit's browser-based IDE. The Replit Agent can take a natural language description of an app, build it, debug it, and deploy it — all within the browser, no local setup required. For beginners and non-technical founders, this is the fastest path from idea to running prototype. The environment includes hosting, databases, and secrets management built in.

Best for students learning to code, non-technical founders validating ideas, and developers who want to spin up quick prototypes without touching infrastructure. The Replit Agent (on Core plan) genuinely handles full-stack apps — it'll build a React frontend, set up a backend API, and wire up a database with one prompt. The speed of getting something real running is its superpower.

Where it struggles: serious production apps hit Replit's resource limits fast. Code generated by the agent can be hard to understand or extend manually. The Core plan (needed for the Agent) is $25/month. And if you already have a local dev setup, switching to browser-based IDE is a regression in many ways.