Bolt.new is a full-stack app factory — you describe what you want, and it scaffolds, runs, and deploys something functional in minutes. Its growth numbers are genuinely staggering, and for non-technical users who need a working product fast, it's hard to beat. v0 is more surgical: Vercel's generative UI tool excels at producing clean, production-quality React and Tailwind components that slot into real codebases, backed by an infrastructure layer that enterprises can actually audit and rely on. The meaningful difference is scope versus reliability. Bolt.new swings big — full apps, backend included — but token-burn unpredictability and a weaker trust posture make it a rougher ride on serious projects. v0 stays in its lane (UI-first, component-level), but does it with more consistency, better tooling, and a platform you can build a workflow around. Pick Bolt.new if you're a founder, marketer, or early-stage team who needs to go from idea to deployed app before lunch. Pick v0 if you're building production interfaces, working within an existing dev team, or if your company has any compliance or reliability requirements that 'move fast' culture doesn't satisfy.