Bolt (bolt.new) is an AI powered development platform built by StackBlitz that generates, runs, and deploys full stack applications directly in the browser. It uses WebContainers to execute Node.js entirely in the browser, which means zero server setup, zero local environment configuration, and zero deployment pipeline management.
You describe what you want in natural language, Bolt generates the code, and you see the running application immediately in the same browser tab. This instant feedback loop is the core advantage: instead of writing code, committing, deploying, and then checking results, you see the output in real time.
Bolt uses a token based pricing system where each AI interaction consumes a variable number of tokens based on project complexity and file size. Free tier provides 1 million tokens per month with a 300K daily cap. Pro costs $25 per month for 10 million tokens with no daily limit.
The key difference from Lovable is breadth. Bolt supports more frameworks (React, Next.js, Vue, Svelte, and more), more deployment targets, and mobile output through React Native and Expo. The trade off is that the token system is less predictable than Lovable credit per interaction model.