Bolt.new

What is Bolt.new?

Bolt.new is a browser-based AI app builder made by StackBlitz that generates full-stack applications and websites from natural language prompts. Users describe what they want to build in chat, and the tool instantly creates a live, editable prototype with frontend and backend code running in the browser.

The platform uses AI agents that automatically route requests to optimal language models, balancing output quality with token costs. It includes built-in testing, refactoring, and error-detection to reduce debugging friction. Bolt handles large projects through improved context management, supporting codebases 1,000 times larger than previous generations. The tool integrates design systems from organizations like Material UI, Chakra UI, Shadcn, and Washington Post, allowing teams to build on-brand without starting from scratch. Users can import designs from Figma or GitHub, or pull in custom company design systems and component libraries.

The freemium model offers standard access to core AI-assisted development features. Paid Pro tiers unlock Bolt Agent, an advanced coding model recommended for production work, plus Bolt Cloud—an all-in-one backend offering enterprise-grade infrastructure. Cloud features include unlimited databases, user authentication and management, SEO optimization, hosting with analytics, and custom domains. This integrated backend eliminates the need for third-party services like Auth0, Firebase, or external hosting providers.

Target users span product managers prototyping ideas within hours, entrepreneurs launching businesses in days, agencies multiplying project delivery without hiring, and students learning by building. Marketers use it for high-performing campaign pages with built-in SEO. The interface consolidates development, design, backend, and deployment into one workspace, removing the friction of account switching or platform juggling.

Similar tools include Replit (collaborative browser-based IDE with AI), Vercel's V0 (