On 10 and 11 October, the DefInSpace 2025 hackathon brought together nearly 400 participants, representing 72 teams from 4 countries across 12 local organisations and 1 digital edition. During the 24-hour competition, the teams worked non-stop on one of the two challenges, one general and one technical, to come up with innovative solutions to the new challenge of real-time video surveillance from low orbit. Twenty-five teams were selected to participate in the semi-finals.

Friday, 28 November marked the final stage of the adventure. After defending their projects in the semi-finals, the four finalist teams presented their projects to a jury composed of members from various fields (institutional, industrial and academic) during the Grand Final, which was held as part of the Defence Innovation Forum in Paris – Porte de Versailles. Following the deliberations, an awards ceremony for the two winning teams was held in the presence of Ms. Alice RUFO, Minister Delegate to the Minister of the Armed Forces and Veterans Affairs, General Vincent Chusseau, Space Commander, partners, sponsors, and senior civil and military authorities.

• Winner of the general challenge: the DK-PAJ team from the digital edition for its Initiative Argus project, which proposes the creation of a new European governance system for sharing SSA data with a technical architecture integrating optical sensors on several satellites to ensure continuous space surveillance.
• Winner of the technical challenge: the Les Shadocks team from the CentraleSupelec school for its VISIO (Video Intelligence and Surveillance In Orbit) project, a concept for a low-orbit video observation constellation, enabling continuous surveillance of targets of interest in a contested environment.

The prize for the two winning teams: a boarding pass to visit the European Spaceport in Kourou, Guiana.