From May 15 to 17, 2026, Sustainista will once again host the Europe Tech Hackathon at the ÖBB Open Innovation Factory in Vienna as part of ViennaUP. According to Sustainista’s event page, the 2026 edition invites designers, innovators, and tech enthusiasts to redefine the potential of AI agents and work on pressing sustainability challenges with real-world impact. The page presents the hackathon as a collaborative innovation format built around mentoring, ideation, pitching, and solution development.