SumToZero was founded as a collaboration between Dan Bernasconi, Jean-Claude Monnin and Mark de Gids, who met when working for the Swiss America’s Cup Team Alinghi in Valencia, 2007.

After completing a PhD on sail modelling for Alinghi, working closely with Michael Richelsen of North Sails, Dan ran the VPP and designed foils for Alinghi in their 2010 deed-of-gift campaign against Oracle. When Alinghi’s Cup campaign ended, Dan began to develop Gomboc, which became Emirates Team New Zealand’s VPP tool through the development of the first big foiling catamarans – the AC72s.

Long before that, Jean-Claude had pioneered the use of simulators in America’s Cup, developing one for Alinghi in 2003 that was used for match race training. Jean-Claude then joined Dan at Emirates Team New Zealand, where they combined their software to turn Gomboc into a full dynamic simulation.

Mark’s main focus had been on the management of sailing data at Alinghi, developing tools for collecting, analysing and viewing the thousands of channels recorded on America’s Cup yachts. Joining Dan and Jean-Claude for Emirates Team New Zealand’s AC50 Bermuda campaign, Mark worked on bringing the appendage GUI into Gomboc, and later on many of the data viewing tools.

Davy also became part of the SumToZero team during Emirates Team New Zealand’s AC36 campaign, bringing a background in sailing simulation and the more mathematical side of physical modelling.

With Dan, Jean-Claude, Mark and Davy all employed in the America’s Cup, we had a need to support our growing list of Gomboc customers, and in 2019, Lucie joined as SumToZero’s first employee. She is been working on technical support, developing yacht models for customers, and with Dan has developing a new sail model to reduce our reliance on external aero data. To keep Gomboc as a weapon of choice for yacht simulation and design, Edoardo Marelli joined the company in 2025, strengthening our software development and support capabilities. Having completed the STL hull reading capabilities for the new Gomboc release, he has now joined Mark and Lucie in developing a new structural model for FSI foil calculations.