Bolt

Bolt is an AI-powered development environment that builds and runs full-stack web applications from natural-language prompts. Made by StackBlitz, it combines a chat interface with an in-browser runtime, letting the AI write code, install packages, start servers, and preview a working app entirely inside the browser.

The tool is aimed at developers and non-technical founders who want to move from an idea to a functioning prototype quickly. Users describe what they want to build, then refine the result through follow-up instructions, editing files directly when needed. Because everything runs client-side through WebContainers, there is no local setup, and finished projects can be deployed with minimal steps.

Bolt follows a token-based pricing model with a free tier and paid plans for heavier use. Launched in 2024 on top of StackBlitz technology, it became one of the fastest-growing AI coding products.