---
title: "Rainmaker Raises $100M Series B for Drone-Based Cloud Seeding"
description: "Rainmaker raised a $100 million Series B from NOA, Upfront, DCVC, Lowercarbon and Dream Ventures to scale drone-based cloud seeding and weather modification."
date: 2026-09-25T00:00:00.000Z
source: https://venturecapitaltracker.com/2026-rainmaker-100m-series-b-cloud-seeding-drones
---

# Rainmaker Raises $100M Series B for Drone-Based Cloud Seeding

> Rainmaker raised a $100 million Series B from NOA, Upfront, DCVC, Lowercarbon and Dream Ventures to scale drone-based cloud seeding and weather modification.

**Rainmaker raised a $100 million Series B** on September 21, 2026 to expand drone-based cloud seeding and weather-modification operations.

NOA VC, Upfront Ventures, DCVC, Lowercarbon Capital and Dream Ventures participated. The announcement did not identify a lead investor or disclose a valuation.

## Deal terms

| Field | Detail |
| --- | --- |
| Company | [Rainmaker](/startup/rainmaker-weather) |
| Financing | **$100M Series B** |
| Investors | NOA VC; Upfront Ventures; DCVC; Lowercarbon Capital; Dream Ventures |
| Lead | Not identified |
| Valuation | Not disclosed |
| Status | Company announced |

## Why this financing matters

Rainmaker is applying autonomous aircraft, sensing and operational software to an old and scientifically complex field. The venture case is that better targeting, measurement and lower-cost deployment can make cloud seeding more useful as drought and water scarcity intensify.

But weather modification is not a normal software market. Results depend on atmospheric conditions, regulatory approvals, environmental assessment and credible attribution. A successful deployment must show that additional precipitation came from the intervention rather than natural variation.

## What requires attribution

Rainmaker's precipitation, cost and validation figures are company claims. The financing announcement does not disclose revenue, contract backlog, customer concentration or independent study results.

## Bottom line

The close is confirmed at **$100 million**, making it one of the larger climate-and-water Series B rounds of 2026. The core reporting question is whether Rainmaker can produce independently measured water gains at commercial scale.

**By:** [Venture Capital Tracker](https://venturecapitaltracker.com/editorial-policy)
**Last updated:** September 25, 2026

**Editorial note:** AI tools assisted with research, structure, or drafting. Venture Capital Tracker retains human editorial responsibility for factual accuracy, relevance, and source quality before publication.