Raising a Series A round feels like validation. Your product has found its audience, your investors believe in your vision, and you've got capital to accelerate growth. But the euphoria of fundraising quickly gives way to a sobering reality: the marketing tactics that got you here won't get you there. Series A SaaS scaling challenges emerge not from lack of resources, but from the gap between founder-led hustle and the systematic growth engines required to hit ambitious revenue targets. The playbook changes completely, and many founders find themselves unprepared for the operational complexity ahead.