The simulation software behind the design of Emirates Team New Zealand’s America’s Cup winning AC50 and AC75, Gomboc has re-defined performance yacht design.

In development since 2010, Gomboc’s VPP, optimisation and foil design capabilities were behind the first large foiling multihull, the AC72, and was instrumental in the creation of the AC75 foiling monohull class. It is now used widely in America’s Cup, IMOCA and Maxi teams, and in the design of super yachts, power craft and experimental concepts.

Tightly guarded within Emirates Team New Zealand for years, Gomboc is fast becoming the standard tool of naval architects for all performance boats.

Sailing Physics

Model any boat imaginable, sail or power, to any level of detail, with Gomboc's versatile physics engine.


Gomboc's powerful Velocity Prediction Program and optimisation capabilities solves

Foil Design

A fully integrated appendage designer lets you modify your foils and rudders and see the effects on performance in immediately.


Yacht don't sail in flat water and steady breeze! Sail your design in gusts, waves and through manoeuvres.

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SumToZero provides consultancy expertise in yacht design, optimisation and control. Within the team, we have a combination of over 50 years’ experience working in the world of America’s Cup and Formula One design and simulation.

Yacht Modelling

Dedicated support to develop yacht models tailored to each project - and to help your team move to using Gomboc.

Performance Analysis

Advanced sailing performance analysis to provide detailed VPP and simulation reports.

Onboard software

Blogger is our onboard version of Gomboc, providing an open instrumentation system as used by Emirates Team New Zealand.

Autopilot Design

Onboard software supply for optimum control of steering, foiling and sail functions.