Founded in 2019, WindBorne Systems collects atmospheric data with long-duration balloons and low-cost sensors and uses that proprietary dataset to power AI-based weather forecasting models. The company operates about 20 launch sites globally and typically has roughly 600 balloons in the air, collecting measurements from hard-to-reach areas including storm eyes. Its data customers today include the U.S. National Weather Service, and it runs research partnerships with the U.S. Air Force and U.S. Navy. WindBorne is expanding its sensing toolkit with aerial sensor packages that can fall into the ocean and continue collecting data as floating buoys. Management reports growing revenue and highlights the proprietary dataset — which CEO John Dean called a "planetary nervous system" — as a moat for its models. The company plans to invest in compute, communications upgrades, and a larger go-to-market team to scale commercial sales to private-sector customers.

Total raised

$63M

Funding rounds

5

Latest round

Series B

Latest activity

Aug 2026