San Francisco, CA | August 2026 — WindBorne Systems, a deep-tech startup transforming global weather forecasting through high-altitude balloon technology and artificial intelligence, has raised an oversubscribed $37 million Series B funding round. The round was co-led by Khosla Ventures and Galvanize, with continued participation from early investor Ubiquity Ventures, which first backed the company during its pre-seed stage.
The latest funding will accelerate WindBorne’s expansion into commercial sectors including energy trading, insurance, and utilities, where more accurate weather intelligence can significantly improve operational planning and risk management.
Reinventing Weather Forecasting
WindBorne Systems has built a proprietary network of autonomous, long-duration weather balloons capable of collecting atmospheric data from regions inaccessible to conventional satellites and ground-based weather stations.
Over the past year, the company has experienced rapid growth, tripling its annual revenue while expanding its operational fleet to more than 600 active balloons deployed simultaneously from 20 launch sites worldwide.
In one notable demonstration of its capabilities, WindBorne successfully navigated one of its balloons into the eye of a typhoon while continuously transmitting real-time atmospheric data, showcasing the resilience and precision of its platform.
Proprietary Data Powers World’s Leading Forecast Model
The company’s competitive advantage lies in its exclusive atmospheric dataset, which fuels WeatherMesh-6, WindBorne’s AI-powered weather prediction model.
According to the company, WeatherMesh-6 currently ranks as the world’s most accurate weather forecasting model on public benchmarks, delivering improved prediction accuracy compared to existing forecasting systems.
WindBorne’s data also contributes directly to the National Oceanic and Atmospheric Administration’s (NOAA) Global Forecast System (GFS), one of the world’s most widely used weather forecasting platforms that supports numerous consumer weather applications.
Trusted by Government Agencies
WindBorne’s technology has already secured customers across the U.S. government, including the National Weather Service, the U.S. Air Force, and the U.S. Navy, validating the platform’s importance for mission-critical weather intelligence.
The newly raised capital will support broader commercialization of its forecasting platform across industries where weather conditions directly influence financial and operational outcomes.
Investors Double Down on Deep-Tech Innovation
Early investor Ubiquity Ventures highlighted its long-term conviction in WindBorne, noting that the company represented an unconventional investment opportunity when it first received pre-seed backing.
The firm’s rapid technological progress, commercial momentum, and expansion into enterprise markets underscore growing investor confidence in deep-tech companies applying artificial intelligence to real-world infrastructure challenges.
Leadership Driving the Next Phase
WindBorne continues to be led by its founding leadership team, including John Dean, Andrey Sushko, Kai Marshland, and Joan Creus-Costa, who have guided the company from an ambitious research-driven startup into one of the fastest-growing innovators in weather intelligence.
With fresh funding, an expanding global balloon network, and industry-leading AI forecasting technology, WindBorne Systems is positioning itself to reshape how governments and businesses anticipate and respond to weather-driven risks.
Funding Snapshot
- Company: WindBorne Systems
- Funding Round: Series B
- Amount Raised: $37 Million
- Round Status: Oversubscribed
- Lead Investors: Khosla Ventures, Galvanize
- Existing Investor: Ubiquity Ventures
- Sector: DeepTech, Weather Technology, Artificial Intelligence
- Technology: Autonomous weather balloon network and AI forecasting platform
- Use of Funds: Commercial expansion into energy, insurance, utilities, AI product development, and global deployment of atmospheric sensing infrastructure.
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