Overstory Closes $43m Series B To Scale AI-Driven Wildfire Prevention And Grid Resilience

• European climate-tech growth equity firm Blume Equity led the round with participation from Energy Impact Partners and existing investors.
• Overstory also announced its next generation of Wildfire Intelligence, now using a proprietary Fuel Detection Model to dynamically assess wildfire risk.
• Tamara Mendelsohn, former CMO at Eventbrite, has been appointed Chief Operating Officer to guide the company's next phase of growth.

AMSTERDAM, Nov. 25, 2025 /PRNewswire/ -- Overstory, the leader in vegetation intelligence for the utility industry, today announced $43M in Series B funding. The round was led by Blume Equity, with participation from Energy Impact Partners LP ("EIP") and existing investors including B Capital, Semapa Next, Pale Blue Dot, CapitalT, Convective Capital, Bentley Systems, MCJ and Moxxie Ventures. The company will use the funding to accelerate development of its AI-based risk models, advance its wildfire prevention offering, and expand globally.

For utilities, vegetation is not only the leading cause of outages and wildfires, but often the single largest operational expense. In recent years, tree mortality, labor costs, demand and extreme weather events have all increased, driving utilities to find new ways to sharpen how they manage vegetation to build more resilience and reliability. Overstory uses high-resolution satellite data and AI to help utilities pinpoint risks tree by tree – reducing outages, preventing wildfires, and ensuring power remains safe, reliable, and affordable.

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

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." 

The funding follows seven years of catalytic growth, with Overstory now serving six of the ten largest utilities across the Americas. The team has grown to more than 80 people, representing 16 nationalities and spanning disciplines from machine learning and data science to arborists and wildfire experts. Guiding the company's next phase will be its new Chief Operating Officer, Tamara Mendelsohn. A seasoned operator and former Eventbrite CMO, Mendelsohn brings experience in scaling a company from seed stage to IPO.

"Utilities are at a pivotal moment, facing more extreme weather events every year," said James Sprinz, Principal at EIP. "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."

Overstory Expands Wildfire Intelligence To Prevent Catastrophic Fires Before They Start

Overstory has built its reputation helping utilities identify vegetation that could cause outages and sparks. Today, the company launched the next evolution of its Wildfire Intelligence product, now backed by its proprietary, industry-first Fuel Detection Model. The technology helps utilities pinpoint areas across their network that contain the highest risk fuels, where a spark is most likely to ignite and spread. Unlike publicly available fire risk maps commonly used today, Overstory's AI-backed tools recommend the exact locations and actions that will have an outsized impact on wildfire mitigation.

"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," said Fiona Spruill, CEO of Overstory. "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."

For more information, please visit overstory.com

About Overstory:
Overstory is an AI-powered grid resilience platform shifting how utilities protect communities from outages and wildfires. The company harnesses high-resolution satellite imagery and proprietary AI models to provide the critical intelligence needed to move utilities from reactive maintenance to a targeted, risk-based resilience strategy. By pinpointing the highest-risk vegetation and assets, Overstory empowers its partners to direct resources with precision, maximize the impact of every dollar spent, and build a safer, more reliable, and more resilient grid for everyone. Overstory is a global company with a U.S. headquarters in Boston and a European headquarters in Amsterdam.

About Blume Equity:
Blume Equity is a European climate-tech growth equity firm based in London and Amsterdam. Blume Equity partners with disruptive climate tech scale-ups that increase efficiency and climate resilience. The Blume team are growth specialists, providing flexible scale-up capital and value creation support to visionary entrepreneurs who are driving innovation and solving the climate emergency. For more information about Blume Equity, please visit: https://blumeequity.com

About Energy Impact Partners: 
Energy Impact Partners LP (EIP) is a global energy investor with a proprietary model designed to drive innovation. EIP brings together entrepreneurs and some of the world's most forward-thinking energy and industrial companies to advance innovation for a better energy future. Investing in venture, growth/private equity and credit, EIP seeks attractive risk-adjusted returns for its investors by leveraging its differentiated strategy and industrial ecosystem. With over 80 corporate partners and over $4.5 billion in assets under management, EIP invests globally with over 100 professionals based in its offices in New York, San Francisco, Washington D.C., Atlanta, Palm Beach, London, Cologne and Oslo. For more information on EIP, please visit www.energyimpactpartners.com.

Media contact:
Cait Harding, VP Marketing, Overstory
[email protected]

Logo - https://mma.prnewswire.com/media/2831246/Overstory_Logo.jpg