Building a sales funnel for a SaaS startup is fundamentally different from building one for an established company. Early-stage founders often copy enterprise sales playbooks and end up with processes that are too heavy, too slow, and misaligned with what they actually need: validated learning about their market. In this video, TK Kader --- founder of Unstoppable and a go-to-market strategist who has helped hundreds of SaaS founders --- walks through how to construct a sales funnel designed specifically to accelerate the journey to product-market fit. He explains why traditional funnel metrics like MQL volume and conversion rates can be misleading for startups, and what to measure instead when your primary goal is learning whether you have something people truly want. Kader covers the entire funnel from top-of-funnel demand generation through to closed deals, but with a founder-led lens that prioritizes high-velocity learning loops, direct customer conversations, and iterative refinement of both your product and your messaging. The framework emphasizes doing things that do not scale --- founder-led sales calls, manual onboarding, deep customer interviews --- as the fastest path to the scalable engine you will eventually need. If you are a SaaS founder wondering why your pipeline looks full but your conversion rates are terrible, this video will help you diagnose the real issues and rebuild your funnel for growth that sticks.