How Nelly Conquers Healthcare with Process Innovation: 2,500 Medical Practices, 160 Employees, 209% NRR

From €5 Dog Registration to €25M ARR Health Fintech

€170 million in funding, 2,500 medical practices as customers, €25 million ARR – Nelly's story reads like a textbook case for successful pivots. What started as a digital dog registration website for €5 has become one of Germany's most exciting health fintechs.

Niklas Radner, Co-Founder and CEO of Nelly, brings impressive fintech experience: N26 (when it was still 14 employees), Rocket Internet at Foodora, and Klarna. In the latest Unicorn Bakery episode, he shares how three friends started a side project during COVID – and why the path led away from their original plan.

Founder-Market-Fit Over Product-Market-Fit

The original dog owner app idea was quickly abandoned. "We realized we weren't the right founders for that market," Niklas explains. Instead, their background led them to healthcare – a massive, barely digitized market with enormous potential.

The pivot was radical but strategically sound. Niklas and his team recognized that healthcare doesn't need another practice management software, but a revenue engine that sits on top of existing systems.

The Stripe Strategy for Healthcare

Nelly adopted a proven model: software as distribution, payments as monetization. While Stripe reaches millions of companies through simple payment integration, Nelly uses digital patient intake as the door-opener for their real monetization – factoring.

"We don't replace practice software, we complement it," Niklas emphasizes. Digital patient intake is the entry point through which Nelly builds trust and optimizes processes. The real business lies in factoring – Nelly purchases outstanding receivables from medical practices and provides immediate cash flow.

Healthcare Factoring: An Underestimated Market

Factoring works differently in healthcare than in e-commerce. While online shops often struggle with payment defaults, accounts receivable cycles with health insurers are predictable and default risk is minimal. Nelly recognized this market gap and built a credit line that provides medical practices with immediate liquidity.

The numbers speak for themselves: with 209% Net Revenue Retention, Nelly shows that existing customers don't just stay, but continuously expand their business with the company.

Sales Strategy: Bottom-Up and Top-Down Simultaneously

Nelly's go-to-market strategy is two-pronged: bottom-up, individual practices are approached directly; top-down, the company scales through PE-backed practice chains. This combination enables reaching both individual practices and larger healthcare organizations.

Particularly impressive: after the Series B, Niklas didn't expand the sales team but doubled quota attainment. This signals Nelly's evolution from a sales-led to a product-led organization.

€170 Million: Why Health Fintechs Need So Much Capital

Nelly's funding rounds are impressive – but why does a health fintech need so much money? The answer lies in the business model: factoring requires substantial capital reserves to purchase receivables. €70 million in equity is needed to provide the credit lines for the factoring business.

When selecting investors, Niklas didn't just look at capital but at strategic partners. From Diana zur Löwen through GFC to Cathay Innovation – each investor brings specific expertise and networks.

CEO Evolution: A New Founder Every Year

One of the most honest insights from the episode: "As CEO, you have to completely grow into your role anew every year." Niklas openly shares how brutal feedback from the founding team after the Series B pulled the rug out from under him.

The most important lesson: delegation is the most underestimated CEO skill. His 12 months of 12-hour days at Rocket Internet showed him that burnout affects not just health but also decision quality.

The Path to €100 Million ARR

With €25 million in booked ARR and the "strongest quarter ever," Nelly is Series C ready. The path to €100 million ARR will be driven by two levers: market share gains and ACV increases through AI integration.

Nelly demonstrates how process innovation can transform entire industries. The company isn't just building software but new financial infrastructure for European healthcare – a market with enormous potential and minimal digitization.

Nelly's story proves that sometimes the best plan is to throw out the original plan and build where your expertise is strongest.