Rainmaker Raises $100M for Cloud Seeding Expansion
Rainmaker $100M Series B will expand cloud seeding research after the company reported more than 145 million verified gallons of freshwater.
Rainmaker Technology Corporation has raised $100 million in a Series B round to expand its atmospheric research organization and lower the cost of freshwater production through cloud seeding. The El Segundo, California company operates drone-based seeding programs in Utah, Idaho, Oregon, California, and Colorado. Rainmaker reports more than 145 million verified gallons of freshwater from 82 seeding signatures recorded over four months. The round includes NOA VC, Upfront Ventures, DCVC, Lowercarbon Capital, and Dream Ventures.
Verified Precipitation Results
Rainmaker flies weather-resistant drones into winter storm clouds and releases silver iodide, a particle around which ice crystals form. As the crystals grow, they can fall as rain or snow. The company uses its radar and validation systems to measure additional precipitation attributed to individual operations.
Earlier this year, Rainmaker recorded 82 unambiguous seeding signatures, radar patterns linking precipitation to a seeding flight. The company said those results account for more than 145 million verified gallons, nearly the annual water use of 1,800 American households. In August, it reported producing 19 million gallons in about three hours near Homer, Alaska.
Augustus Doricko, Founder and CEO at Rainmaker Technology Corporation, said:
“The future of water is the future of everything. With this historic investment in weather modification technology, Rainmaker will continue to conduct frontier atmospheric research, cloud seed to end drought in the American west, and develop the tech stack that will make the earth more habitable for generations to come.”
Research Team Expansion
The Series B funding will support expansion of Rainmaker’s research team, which includes atmospheric scientists, radar and satellite specialists, and material scientists. Its work will examine cloud selection, timing, material volumes, and where precipitation should fall to benefit watersheds used by farms, ecosystems, and industry.
Rainmaker also plans to support research at national laboratories and fund weather modification research at American universities. The company said its cost per acre-foot falls as production rises, while additional drone teams can operate in parallel.
Supply Cost Target
Rainmaker expects its water to cost less than most other new supply sources by the November 2026 to April 2027 season. The company named desalination and payments to farmers to leave fields unplanted as comparative sources of supply.
The company is positioning cloud seeding around water supply in the American West, where it cited record-low snowpack after the winter of 2025-2026 and historic lows at reservoirs along the Colorado River. Rainmaker also intends to apply its approach to hail damage and poor soil, alongside its water focus.
Western Operations Growth
Rainmaker currently operates in Utah, Idaho, Oregon, California and Colorado and is working to expand operations throughout the American West and globally. Its operating model combines drone deployment with radar and validation systems that the company uses to measure precipitation attributed to individual seeding operations.
