Rain Maker raises $25M Series A to scale cloud seeding operations and vertical integration

Summary

Rain Maker, a cloud seeding startup, has closed a $25 million Series A led by Lowercase Carbon, with Naval Ravikant, Greg Bernstein from ACEP Sovereign's Cap, and Drover Ventures also participating. The round was announced publicly after the capital had already been deployed, and the company says it has doubled realized revenue since its last investor update.

The vertical integration story

Rain Maker's original plan was to be a systems integrator — off-the-shelf radar, drones, chemicals, weather models. That plan collapsed quickly. There was effectively one supplier for meteorological radar, a German manufacturer charging $51,000 per unit with a 9-to-12-month lead time. Rain Maker built its own version at roughly one-fifth the cost with a five-week lead time. The same logic drove it to design its own drone, the Elijah — a Class 1 UAS capable of flying in severe icing conditions, which the company claims is the only NATO-certified drone in that category — and to develop proprietary aerosol dispersion systems and novel cloud seeding chemistry.

The $25 million breaks down roughly 30/30/20/20: 30% into the Eden atmospheric sensing platform (radar, lidar, longwave infrared, aerosol probes, and weather instrumentation), 30% into the Elijah drone program, 20% into novel research and validation probes, and the remainder into go-to-market and regulatory work.

Roll-up strategy

Alongside the hardware build-out, Rain Maker acquired North American Weather Consultants, a legacy cloud seeding operator out of Salt Lake City, financed through project finance rather than equity. The existing team was retained, and Rain Maker injected its technology stack into the operation. The thesis is that the incumbent cloud seeding market consists of technically unsophisticated operators serving customers — states, municipalities, Gulf sovereign buyers — who are desperate enough for water to pay for low-efficacy services. Rain Maker's plan is to consolidate those operators and upgrade them with its own stack, capturing better yields and more transparent reporting as the wedge. Further acquisitions in probe technology and materials science are on the roadmap.

Revenue mix

About 85-86% of revenue is domestic. Of that, roughly 75% comes from state governments — departments of natural resources and agriculture — with the remaining 25% split between municipalities and ski resorts. International revenue, including a radar deployment to Argentina, makes up the rest.

Market creation framing

Rain Maker pushed back on investor requests for market comps by arguing there are none — cloud seeding at this technical level is net new. The SpaceX analogy the founder uses: SpaceX is a launch services provider that builds and operates all its own hardware to get things to orbit; Rain Maker does the same to get precipitation on the ground. The longer-term aspiration is to move toward a high-margin utility model, with the argument that cloud-seeded water is the cheapest water you can produce at scale.

Demand, the founder says, has never been the constraint. Customers were expressing urgency before Rain Maker had a flyable drone. The operational inflection came in October 2024, when the company relocated to a rural site in Oregon for intensive testing, got its system to a deployable state, and began converting that latent demand into contracts.