Bolt.new

Bolt is an AI-powered full-stack web application builder that generates complete, deployable applications from natural language descriptions. Built by StackBlitz, Bolt runs entirely in the browser using WebContainers technology — meaning you can build, preview, and deploy apps without any local environment setup.

Full-Stack Generation in the Browser

Bolt's defining feature is that it generates not just code, but complete, running applications. When you describe an app, Bolt scaffolds the project structure, installs dependencies, writes frontend and backend code, configures routing, and launches a live preview — all in real time within the browser. This end-to-end pipeline reduces the time from idea to working prototype to minutes.

Supported Stacks

Bolt supports popular stacks including React, Next.js, Vue, SvelteKit, Astro, and Node.js backends. It integrates with Supabase for database functionality, Stripe for payments, and various UI libraries. The tool is opinionated about stack choices, which streamlines generation but limits flexibility for teams with specific requirements.

Ideal Use Cases

Bolt excels for rapid prototyping, hackathon projects, MVPs, and internal tools. Product managers and designers with minimal coding background can build functional prototypes that developers can then extend. For developers, it significantly accelerates the scaffolding phase of new projects.

Quality and Realism

Generated code quality has improved substantially through 2025. Simple to moderately complex applications are well-handled. Very complex business logic, advanced authentication flows, and highly customized architectures still benefit from human engineering. Bolt's strength is speed and accessibility, not architectural sophistication.