YC Demo Day Showcases Startups in Space, AI, and Drones

Y Combinator's Winter 2026 Demo Day highlighted several promising startups attracting significant investor interest. Beyond Reach Labs is developing deployable solar arrays for satellites, aiming for a tenfold power increase at an 88% cost reduction. Byteport introduced a new file transfer protocol, DART, reportedly 10-1500 times faster than TCP, crucial for the AI era. Hex Security offers AI-powered continuous security testing tools, claiming over $1 million in run-rate revenue within eight weeks. GrazeMate is deploying autonomous drones for cattle herding and monitoring, while GRU Space plans to build lunar infrastructure, starting with a hotel by 2032.