What it is: Bolt (Bolt.new) is StackBlitz’s AI-powered web development platform. It lets you build, run, and deploy full-stack web apps entirely in your browser through a chat interface with an AI agent.
Who it is for: Developers and non-developers prototyping web apps, especially those who want the AI to handle setup, dependencies, and deployment.
Best if: You need a working web app fast and don’t want to install Node, configure a deployment pipeline, or wait for npm install.
Skip if: You’re working on a large existing codebase or production system — Bolt is built for greenfield work, not large legacy projects. Want one practical AI workflow every morning? Subscribe to our free daily newsletter.
What is Bolt?
Bolt (officially Bolt.new) is an AI development platform from StackBlitz, the company behind WebContainers — the technology that runs Node.js in your browser. Bolt launched in October 2024 and quickly became one of the fastest-growing developer tools of all time, hitting $40M ARR within 4 months.
What makes Bolt distinctive: the entire development environment, including the file system, npm packages, dev server, and database, runs inside your browser via WebContainers. There’s no remote server compiling your code. You describe what you want, the AI writes it, and you see the running app instantly.
Why does Bolt matter?
Bolt is the “native to the browser” entrant in the prompt-to-app category. Where Lovable and Replit run your app on their servers, Bolt actually compiles and runs everything in your browser tab. The result is dramatically faster iteration: changes appear immediately, you can see logs in real time, and there’s no “deployment” lag.
That model also limits what Bolt can do — anything that requires significant backend compute (large ML models, heavy data processing) doesn’t fit. For most front-end-heavy web apps, marketing sites, dashboards, and tools, Bolt’s speed advantage is real.
How do you use Bolt?
Go to bolt.new. Type a description of the app you want, hit Enter. Bolt generates the project, runs it in the browser, and shows you a preview. From there, you chat with the AI to modify, add features, or fix bugs.
Free tier with usage limits. Paid plans (Pro at $20/month, Teams above) unlock more daily messages, larger projects, and faster compute. Bolt integrates with Netlify, Vercel, and other deployment platforms for sending the final app live.
Related terms
Learn more on Beginners in AI
Sources and further reading
Last reviewed: May 2026. AI terminology evolves quickly — verify specifics on the official source pages above.
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