Vibe Platform

Bolt

Bolt.new AI full-stack app builder
Category
In-Browser Full-Stack Generator
Platform
Web (StackBlitz WebContainers)
Pricing
Free tier / Pro ($20/mo) / Teams
Runtime
Node.js in browser via WebContainers
Stack
React, Next.js, Astro, vanilla — agent picks
Best For
Rapid prototypes, hackathons, learning projects

Bolt.new is StackBlitz's AI app builder — it runs a full Node.js environment in your browser via WebContainers, so agents can install npm packages, run dev servers, and show live previews without any local setup. Prompt an app, watch it build and run in real time.

Source: bolt.new

Why In-Browser Matters

Bolt eliminates the "clone, npm install, configure" friction. The agent has a live runtime immediately — install deps, run tests, fix errors in a loop. That makes it the fastest sandbox for exploring ideas before committing to your real repo.

Key Strengths

  • WebContainers — real Node.js in the browser, not a mock
  • Live preview — see changes as the agent writes them
  • GitHub export — push to a repo, continue in Cursor
  • Multi-framework — React, Next.js, Astro, and more
  • Zero install — share a URL, collaborator runs instantly

Limitations

Browser runtime has constraints — no native modules, limited file size. Output needs review before production deploy. Use as a prototype sandbox, then hand off to an in-repo agent for real integration.

Deep dive