Weather Startups funded by Y Combinator (YC) 2026

Care Weather collects the highest-accuracy global weather data to help governments and shipping companies adapt to extreme weather. The data is collected by Care Weather’s unique flat-panel radar satellite, which is 1000X more cost effective because it’s vertically integrated, gets more solar power, and sails on top of the atmosphere for a closer view of the surface. Our team includes CEO Patrick Walton (NASA Earth science fellow) and CTO Alex Laraway (mach 4 rockets). In the last 4 months, we built and launched the smallest radar satellite ever. We have $35M worth of LOIs, including one from the Air Force and others from cargo shippers. Care Weather is backed by Boost VC, Kickstart Seed Fund, Y Combinator, and more.

Atmo is the leading company bringing artificial intelligence to meteorology for governments, militaries, and corporations. Atmo builds state-of-the-art AI weather forecasts that are up to 50% more accurate, 10x more detailed, and run 40,000x faster. Atmo has rapidly become the trusted AI meteorology partner for high-stakes users worldwide, such as the US Department of Defense, top aerospace companies, the Philippines, and the United Nations. Today, Atmo forecasting systems protect vital infrastructure and enhance economic activity for its partners, including disaster response, renewable energy, agriculture, transportation, and national security.

WeatherChecks application tells anyone when severe hail is about to strike and when it has in fact impacted a property. Using state of the science technologies we compute and analyze geo-weather data faster than every weather company globally. This allows companies, insurance companies specifically to gain dynamic insight into their overall exposure and enabling them to respond more quickly and efficiently to disaster.