Describe it, run it, ship it
Bolt, at bolt.new, is an AI builder from StackBlitz that generates websites, web apps, and mobile apps from a chat description. Beyond writing code it installs packages, runs the app, and previews it, all in the browser.
Without setting up a development environment locally, you enter an idea, choose Build now, and see something working within minutes. From there you review the code and the running result and refine features and design through further instructions.
What you can build
- Personal sites, company sites, landing pages
- Web apps for booking, recruitment, or customer management
- SaaS prototypes and internal tools
- Mobile apps for phones
- Services that use external APIs and databases
It suits people without programming experience building a prototype, and equally developers skipping tedious setup to test an idea quickly.
Compared with Lovable, v0, and Replit Agent
Lovable makes the conversation-and-preview loop for web apps particularly clear. v0 fits UI work and the Vercel web stack. Replit Agent handles a broader range of outputs and cloud environments beyond the web.
Bolt’s distinction is running a real development environment inside the browser while covering both web and mobile quickly. Since these overlap heavily, choose on what you are building, whether you have existing code, where it will be hosted, and which database you want.
Cautions
Because the AI adds packages and runs commands, stacking instructions without reading the changes and errors can leave the project tangled. Save state before a large change, and when something breaks, find the cause before continuing.
Keep API keys and database credentials out of chat and source code, using the service’s secrets storage instead. Check hosting costs, access permissions, and handling of personal data before going live.