What does it take to scale a startup from 5 to 55 team members, secure a €7 million Series A, and onboard over 400 corporate customers in less than three years?

In a recent interview, Philipp Reißel, CEO and Co-founder of amber, sat down to reflect on his journey since graduating from the CF Accelerator (formerly known as the AI Founders Program) in late 2023. From key takeaways during his time at Campus Founders in Heilbronn to actionable advice on navigating startup growth, here are the core highlights and lessons from Philipp’s journey.

1. Key Takeaways from the CF Accelerator

Reflecting on his time spent at Campus Founders in Heilbronn during the fall 2023 cohort, Philipp highlighted two major influences that continue to shape amber today:

  • Strategic Pricing & Tiering: Practical sessions on structuring pricing tiers, feature add-ons, and monetization models provided actionable frameworks still used in amber’s strategic decisions today.
  • The Power of a Founder Network: Working alongside 10 ambitious startups and 20 fellow founders created a tight-knit support network. Sharing real-time founder challenges built lasting connections that endure well beyond graduation.

2. Navigating the Three Pillars of Startup Growth

When asked about the biggest hurdles after graduating, Philipp pointed to three universal startup challenges: Fundraising, Product, and Go-To-Market (GTM).

Fundraising: Relationships First

Fundraising is ultimately about personal connection. Getting to know investors on a personal level and building a trusted network early on is crucial for closing successful financing rounds.

Product: Stay Hands-On

Even as team size grows, founders must maintain a deep, hands-on understanding of the product roadmap, team responsibilities, emerging AI trends, and the 12-month forward vision.

Go-To-Market: Build in Public

Overcome the hesitation to put yourself out there. Get out of your comfort zone, leverage social media and press articles, and share your building journey publicly to build brand awareness and market presence.

3. The Next Horizon: Becoming Europe’s Business AI

With €7 million in Series A funding and 400+ corporate clients onboarded, amber is setting its sights on expanding across Europe.

Beyond geographic growth, amber is evolving its product capabilities. Leveraging its unique data layer approach, amber aims to transform into a proactive AI platform—one that understands context, work streams, and team collaborations to deliver crucial insights and internal knowledge before users even realize they need them.