About Us

We’re a passionate team based in Berlin, united by a shared commitment to simplifying reselling and promoting sustainability. With backing from Antler, an early-stage investor that supports groundbreaking projects, and Climate X, an accelerator from the Berlin Innovation Agency dedicated to solving the world’s most pressing climate challenges, we’re driven to make a difference.

Meet the Founders:

• Harry: A French-British entrepreneur and two-time startup founder, Harry brings deep expertise in building brands and fostering communities. His focus is on ensuring that SEMPI delivers a seamless and engaging experience for every user.

• Marjorie: Originally from France but a long-time resident of Berlin, Marjorie has 20 years of experience in scaling businesses and solving operational challenges. As the backbone of the company, she’s focused on building a strong, sustainable foundation for SEMPI's future success.

• Seyithan: Hailing from Turkey, Seyithan is our tech mastermind with years of experience as both a founder and a senior engineer at one of Berlin’s top unicorns. He’s committed to creating a product that is both innovative and reliable.

Together, we’re on a mission to make reselling your items as easy as possible, while keeping unwanted goods out of landfills.