Overstory raises $43 million to scale wildfire prevention intelligence globally

Series B funding for wildfire prevention tools

Overstory, a vegetation intelligence company for the utility industry, has announced $43 million in Series B funding to develop its AI-based risk models and expand its wildfire prevention work.

The company said the funding round, announced on 25 November 2025, was led by Blume Equity with participation from Energy Impact Partners and existing investors.

Overstory plans to use the capital to advance its wildfire prevention offering and support international growth.

Existing investors include B Capital, Semapa Next, Pale Blue Dot, CapitalT, Convective Capital, Bentley Systems, MCJ and Moxxie Ventures.

The company said the new funding follows seven years of rapid expansion, during which it has come to serve six of the ten largest utilities across the Americas.

Overstory’s team now numbers more than 80 people, representing 16 nationalities and combining machine learning and data science expertise with arborists and wildfire specialists.

Guiding the company through its next phase will be new Chief Operating Officer Tamara Mendelsohn, a former Eventbrite Chief Marketing Officer with experience in scaling a business from early-stage to public listing.

Vegetation intelligence used to manage outage risk

According to Overstory, vegetation is the leading cause of outages and wildfires for utilities and is often their largest operational expense.

The company said rising tree mortality, higher labour costs, growth in demand and more frequent extreme weather are driving utilities to seek more precise vegetation management.

Overstory uses high-resolution satellite data and AI models to assess vegetation conditions tree by tree.

Its tools are designed to help utilities locate high-risk vegetation, reduce outages and limit wildfire ignition potential while keeping power delivery safe, reliable and cost-effective.

Andy Abranches, VP of Wildfire Mitigation at Pacific Gas and Electric Company (PG&E), said: “Innovation and technology have become the pillars of progress when it comes to wildfire prevention.

“Satellite data, AI and the vegetation-management intelligence we get from companies like Overstory are transforming how utilities think about wildfire prevention.

“The details are in the data, and that precision allows us to deploy our crews where wildfire risk is greatest.”

James Sprinz, Principal at Energy Impact Partners, said: “Utilities are at a pivotal moment, facing more extreme weather events every year.

“Overstory is tackling this challenge in a way that utilities can act on immediately, making sense of satellite data to spot the exact tree to trim, pole to clear, or asset to replace.”

Wildfire intelligence product targets high-risk fuels

Overstory said it has built its current position by helping utilities identify vegetation that could trigger outages and sparks.

The company has now launched an updated version of its Wildfire Intelligence product backed by a proprietary Fuel Detection Model.

Overstory said the Fuel Detection Model identifies areas across a network that contain the highest risk fuels, where a spark is most likely to ignite and spread.

The company stated that, unlike publicly available fire risk maps, its AI tools highlight precise locations and recommended actions that can have a larger effect on wildfire mitigation.

Fiona Spruill, CEO of Overstory, said: “Utilities are on the front lines of keeping communities safe, and they’re eager to use the best data available.

“When we talk about how satellites and remote sensing can identify dying trees and wildfire risk, they lean in.

“We’re grateful to our forward-thinking investors for supporting this next chapter – expanding our intelligence product to address storms and wildfires, helping utilities build a more resilient and reliable grid.”

Investor backing and leadership for growth phase

Blume Equity, which led the Series B round, framed the investment as a climate-focused move with operational benefits for utilities.

Michelle Capiod, Co-Founding Partner at Blume Equity, said: “The companies that will drive the greatest impact on our planet are those that deliver climate solutions with real economic value.

“Overstory exemplifies this — transforming satellite data into actionable insights that help utilities both prevent climate-related disasters and drive operational efficiencies.

“Their customer-first approach and leadership in AI has enabled them to develop cutting-edge, yet highly practical, solutions that deliver a tangible return on investment.

“This is exactly the kind of scalable, high impact climate solution we’re proud to support at Blume Equity.”

Overstory said Mendelsohn’s appointment as Chief Operating Officer is intended to support international scaling and operational discipline during the company’s next growth phase.