The Social Nest Foundation invites applications for its 2026 Startup Challenge to support early- and growth-stage ventures driving social and environmental transformation. Legally incorporated startups from any country are eligible to apply, provided they have a validated minimum viable product or a product already on the market. The competition focuses on five innovation areas, including climate tech, smart cities, agritech, health, and inclusive economic systems. The single winning startup receives a €10 thousand cash prize, alongside international pitch opportunities and matchmaking sessions with investors in Valencia, Spain. The application deadline is 14 July 2026. Link