
Karel Papik, Product Fruits
The Risky AI SaaS Rebuild That Broke a $2M ARR Ceiling
Karel Papik is the co-founder of Product Fruits, a digital adoption platform based in Prague, Czech Republic. Before SaaS, Karel spent 15 years building video games - shipping 16 titles, many of them for women - where he mastered the art of SaaS onboarding and user engagement through psychology rather than tutorials. When Karel met his co-founder Ladislav Salom, Product Fruits had just six customers. Within 12 months of their first investment from Lighthouse Ventures, they grew to $50K MRR using paid search as their primary acquisition channel. They achieved a 24-25% free trial conversion rate by applying product-led growth principles and gaming psychology to their own SaaS onboarding experience. But around $2M ARR, growth hit a wall. The product had become too complex for self-serve SaaS onboarding, and PLG stopped being effective. Meanwhile, AI-powered competitors were emerging fast. Karel describes this as the moment they stopped "riding the horse" and started "riding the tiger." In a gutsy move, Karel emailed investors to say they were pausing feature development on the existing platform to rebuild it from scratch around AI. The investors responded by asking how much more money they needed. The result is an AI copilot that handles discovery calls, tailors onboarding flows, prevents churn, and resolves 80% of support tickets automatically. Today Product Fruits has over 1,300 paying customers - including KPMG, universities, and stock exchanges - with a 25-person team generating millions in ARR. Karel shares lessons on why PPC worked when most founders say it doesn't, how gaming psychology applies to SaaS onboarding, and why he believes talking to customers too much can hold you back.



