About us


Read about the management team of Unless.

unless office 2000px A peek inside our office.

Sander Nagtegaal

Sander is co-founder and CEO at Unless. Previously, he was CTO at myTomorrows (Balderton Capital, EQT Ventures, Sofinnova), co-founder and CTO of Peecho (Peak Capital), CTO at Sumis (acquired) and Chief Architect at Albumprinter (acquired).

He lives on an old ship with his pet snail, teaches a weekly kung fu class and is a competitive obstacle racer.

Marcel Panse

As a CTO and co-founder, Marcel leverages his experience as Chief Architect and lead developer at Peecho and several other start-ups like Albumprinter and myTomorrows.

When he doesn't try to solve complex problems with elegant solutions, he loves to climb rocks or spend time with his family.

Yvonne Koleczek

Before making Unless look cool with her wicked marketing skills, Yvonne was a marketing manager at F.A.Z. and growth hacker at myTomorrows. Occasionally, she writes for TNW and VentureBeat.