Vibe coding is the fastest-growing movement in tech — and 63% of the people doing it have never written a line of code. Coined by Andrej Karpathy in 2025, vibe coding means building software by describing what you want in plain English, and letting AI generate the full application — code, UI, database, authentication, and deployment — automatically. Tools like Lovable, Bolt.new, and Replit have made this a reality, not a concept. Lovable hit $300M ARR faster than any software company in history. Replit is valued at $9 billion. 21% of Y Combinator’s latest cohort reported codebases that are 91% AI-generated. This guide cuts through the hype with everything non-technical founders need to know: how vibe coding actually works, the best tools ranked for beginners, the critical security risks you must understand before shipping to production, and the three-step strategy — prototype, validate, then bring in developers — that separates founders who ship from founders who plan forever.