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Bolt

StackBlitz's in-browser AI builder: prompt, and it scaffolds, codes, and runs a full-stack app entirely in your browser tab.

Type
App builder
Interface
Web
Open source
Partial
Model choice
Curated
Pricing
Freemium · from $25/mo
Official site
Visit →

What is Bolt?

Bolt.new leverages StackBlitz's WebContainers to run a real Node.js environment in the browser. You describe the app; the AI writes the code, installs packages, and runs the dev server — all without leaving the page.

Key features

01

In-browser runtime

Real Node.js via WebContainers — no cloud VM needed.

02

Full-stack scaffolding

Frontend plus backend in one go.

03

Instant preview

See and interact with the running app as it's built.

Pros and cons

Pros

  • No setup, no cloud — runs in the tab
  • Full-stack, not just UI
  • Great for experiments and demos

Cons

  • Browser resource limits for big apps
  • Token/credit costs
  • Production deploy needs export

Who is it for?

Anyone who wants to prototype full-stack apps instantly in the browser.

FAQ

Is Bolt free?
Free tier with limits; paid plans for more tokens.
Who makes Bolt?
StackBlitz, the in-browser IDE company.
Can I deploy what I build?
Yes — export and deploy, or publish through their flow.

Try Bolt

Pricing and features change fast — check the official site for the latest.

Visit official site →

Last updated: October 2026 · Compare all agents