You don’t need a full product to start your startup—what you really need is proof. In this guide, we break down how to validate your startup idea without writing code or building anything at all. Learn how today’s founders are using no-code tools, fast feedback loops, and real user data to launch smarter in 2025. Plus: we’ll show you seven tools that can help you test and validate faster, so you don’t waste time building something no one wants.