Budderfly

Overview

Budderfly is a Shelton, Connecticut company that finances, installs, and operates energy efficiency upgrades at commercial buildings under long-term service contracts, charging customers nothing upfront. The company was founded in 2007 by Al Subbloie, a serial entrepreneur who previously founded Tangoe, a telecom expense management company that IPO'd on NASDAQ in 2011. Budderfly is majority owned by Partners Group, the Swiss private markets firm, which committed more than $500 million in equity in 2022 and has backed the company's expansion from roughly 2,750 sites at the time of that investment to more than 8,500 by early 2026.

The company targets mid-market commercial customers with multiple locations and standardized building footprints: primarily franchise restaurant chains, fitness clubs, convenience stores, and healthcare facilities. By taking over the utility bill and managing the full energy infrastructure of a building, Budderfly generates revenue from the gap between what energy would have cost before its upgrades and what it costs after. The model grew from $400,000 in revenue in 2017 to a $250 million recurring run rate by 2025, and the company reports roughly 66% year-over-year growth for 3 consecutive years.

Business model

Equipment & technology

Budderfly's upgrades span more than 25 categories. The largest-impact measures are typically HVAC replacement (high-efficiency units with smart controls), LED lighting conversion, and refrigeration upgrades at food service sites. Additional measures include IoT sensors and metering, smart thermostats, solar PV, battery storage, and water-conserving fixtures. The mix varies by building type: a quick-service restaurant installation prioritizes HVAC, refrigeration, and cooking equipment efficiency; a fitness club installation weights toward HVAC and lighting.

Monitoring and control run through Budderfly's in-house energy intelligence software, which tracks consumption in real time across all managed sites. In 2024 Budderfly acquired Sunverge's distributed energy resource management platform to add DERMS capability, which underpins the VPP dispatch logic. In 2026 it began a rollout of Viridi battery storage systems to an initial 100 sites. The combination of on-site equipment and centralized software control sets Budderfly apart from a conventional energy services company (ESCO), whose role typically ends after installation.

Customer focus

Budderfly's market strategy concentrates on customers with two characteristics: multiple locations with standardized footprints, and operators who want to outsource energy management entirely. Franchise restaurant chains are the archetype. A Wendy's or Subway franchisee operating 50 locations often has neither the capital nor the internal expertise to audit, upgrade, and manage the energy systems across all of them, and the franchisor has no mechanism to force or fund those investments. Budderfly pitches directly to franchisees and to franchise development teams at corporate, where an energy cost reduction program has appeal as a franchisee recruitment and retention tool.

Restaurant customers include Wendy's, Subway, McDonald's, Burger King, Denny's, IHOP, Applebee's, Uno Pizzeria, Jamba Juice, Dunkin', and Yum Brands chains such as KFC, Taco Bell, and Pizza Hut, among others. Beyond restaurants, Budderfly serves fitness chains (OrangeTheory, LifeSpan Fitness), YMCAs, convenience stores, assisted living facilities, colleges, automotive services (Midas, Meineke), and pharmacies. The common thread is a building type that repeats at scale under a single operator or franchise system.

Funding & ownership

Edison Partners led Budderfly's $22 million initial financing in June 2017 and participated in follow-on rounds totaling approximately $84.5 million through 2019. In July 2022, Partners Group acquired a majority stake and committed more than $500 million in total equity, funding a rapid acceleration from roughly 2,750 sites to the current 8,500+. Edison Partners exited at that transaction.

The EaaS model is capital-intensive by design: Budderfly must fund the equipment and installation at every new site before recovering that investment over a 10-year contract. Debt financing is essential to the unit economics. Budderfly's project debt facility started at $300 million and was upsized to $550 million in March 2026 in a transaction led by Global Infrastructure Partners (now part of BlackRock), with co-investment from Vantage Infrastructure and participation from Nuveen Energy Infrastructure Credit, plus a $100 million accordion option. In June 2026 Budderfly separately doubled its Nuveen corporate debt facility to $200 million, bringing total capital access above $1.1 billion, and said it reached positive EBITDA in 2025.

Strategy & outlook

Budderfly's stated target market is $55 billion in annual U.S. mid-market electricity spend: commercial businesses that are too small for large industrial energy programs and too operationally stretched to manage building energy themselves. At 8,500 locations and $250 million in recurring revenue, the company has captured a small fraction of that market. Growth comes from adding new franchise brands, expanding within existing brands (a franchisee with 50 locations becomes 100), and deepening the services at existing sites (adding battery storage and solar to locations where the initial upgrade was HVAC and lighting only).

The VPP builds a revenue stream that did not exist at the company's founding. With 8,500+ locations under active energy management across four ISO territories, Budderfly has assembled a sizable aggregated commercial DER fleet. As it expands dispatch beyond HVAC to refrigeration, storage, and solar, the controllable capacity grows. Grid operators and utilities have historically struggled to reach small commercial customers for demand response; Budderfly's aggregation model is one route to that load.

Key considerations

The EaaS model creates significant balance sheet obligations. Every new site requires Budderfly to fund equipment and installation (typically tens of thousands of dollars per location) and wait years to recover that outlay through the revenue spread. Scaling from 8,500 to tens of thousands of sites requires continuous access to debt capital at costs that preserve adequate margins, and continued growth will require additional debt raises. The unit economics are sensitive to interest rates: if Budderfly's debt cost rises while energy savings margins stay fixed, the economics of new sites deteriorate.

Contract duration creates a different kind of risk. A 10-year agreement with a restaurant franchisee is only as good as the franchisee's continued operation of those locations. Restaurant turnover, bankruptcy, or brand exit from a franchise system can terminate sites before Budderfly has recovered its capital. Concentration in the restaurant sector also means the portfolio is exposed to the structural pressures on the QSR industry, including labor cost inflation and changing consumer behavior.

The VPP is at an early stage. Budderfly activated its multi-ISO VPP in June 2025, and as of mid-2026 active participation covered a small share of its total installed base. Scaling grid services dispatch to the full site portfolio requires safety-tested dispatch protocols across more asset types (refrigeration curtailment carries food safety constraints that thermostat adjustment does not), continued regulatory access across ISO markets, and software reliability at a scale the company has not yet operated. Budderfly describes the VPP as a long-term earnings source rather than a near-term driver.

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