bound4blue develops wind-assisted propulsion systems to reduce fuel consumption and emissions in commercial shipping. Its core product, the eSAIL®, is an autonomous suction sail installed on vessels to generate supplementary thrust using wind. The system combines a vertical wing structure with onboard control software that adjusts sail orientation and suction in response to operating conditions.

Bound4Blue offers multiple eSAIL® configurations suited to different vessel types, supported by engineering, installation and technical services. The solution allows operators to lower fuel use and improve regulatory compliance without changing fuels or main engines.

Customers include Maersk Tankers, Louis Dreyfus Armateurs, Odfjell and Marubeni.