“It's your fiduciary duty to take good care of yourselves. It isn’t until years later that we understood the wisdom. Founder life is a marathon that Marcin uniquely understands and can coach through it, having been a well-loved, successful founder himself. He is the type of servant leader who is always there to help along the way, whether you want to brainstorm your growth strategy, need intros to Polish developers, or a pair of hands to move offices!”

“Marcin is the investor you want in your startup during the good times and the bad times. When we pivoted, he was one of my first calls and instead of worrying about his own investment, he cared about helping me as a founder navigate a tricky situation. He also declined my offer to take his money back when we radically changed ideas. Marcin truly backs the founders as people and has empathy given his own successful founder experience.”

“Marcin was extremely impactful in helping us get to product-market fit by making sure we were measuring the right metrics. He sat down with us to challenge some of our assumptions and helped us design quick experiments that answered the biggest questions. He's a true visionary and is more focused on finding out what needs to be true to get something to work rather than jumping to why something won't work.”

"Marcin has been a great help for us from day one. As someone who has worked at, built and invested in startups, he understands the entrepreneurial journey and can assist you throughout its different stages. His help with kick starting our customer acquisition efforts and making some key introductions were highlights of our collaboration.”

“Marcin has been a terrific thought partner, especially in planning how and when to ramp up demand generation and content strategy. He will always tell you upfront whether he can add value in the given area or not - a kind of intellectual honesty that is both rare and refreshing. The multitude of projects he is engaged with gives Marcin a unique pattern recognition skill across industries and geographies.”

“We spent 5 full days working with Marcin, deep-diving into our business operations. During that time we crafted a clear vision for our company, which to this very day keeps us on the right trajectory. We designed a strategy for the coming quarters and identified key business drivers. Marcin helped us craft communication to our investors, and structured our thinking about potential growth strategies. Do yourself a favor and schedule some time with Marcin.”

"Marcin is both a great human being and goal oriented, no bullshit entrepreneur. I had the privilege to work with him shoulder to shoulder when building from scratch and exiting Marketing Wizards as well as investing in a number of ventures together. A truly sharp mind but also fun and caring partner!”

“Marcin has an amazing perspective on business thanks to his incredible experience. Working for Groupon early in his career, then building and selling Poland’s top performance agency, the network and knowledge from Stanford, together with his investing experience - all that makes a great mixture for a top-notch startup advisor. It's Marcin who gave me the courage and hints along my own VC journey. All this comes with good heart and hard work that Marcin puts into everything he does.”

“I'm very happy Marcin is my investor and I strongly recommend involving him in your startup. To me his insights and knowledge in key startup areas like business building, lean startup methodology, recruitment, funding, investor management or online marketing have been priceless and game changing. Whether it was top level sparring of strategic ideas or down to earth figuring out how to phrase a message to a desired target investor - he was there to help.”

“Marcin is a deep thinker, which makes him my go-to thought partner. Sometimes, when you are in the trenches of building a company, it’s easy to lose sight of the bigger picture. I talk to Marcin whenever I feel a need to get some perspective and a better grip on my guiding first principles. High integrity, high standards, genuine love for entrepreneurship, and childlike wonder all make Marcin a great person to have in your corner on your startup journey.”

“Marcin played an important role in pushing us to better understand our search for product-market fit. I appreciated having him in the room when we were having this conversation. He also nudged us to refocus more resources on customer experience, which proved beneficial for our growth and NPS ratings.”