Company lists · Data refreshed September 2026

Top 25 Energy efficiency financing companies based in the United States

Name: Energy efficiency financing companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 707 companies tracked

RevenueBase identified 707 energy efficiency financing companies headquartered in the United States as of September 2026 and tracks 11,175 professional contacts across them, including 4,817 with verified work emails. New York is the largest hub.

This list covers energy efficiency financing companies headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 16, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 16, 2026 86% judged on-target in blind review

707Companies

11,175Contacts tracked

4,817Verified emails

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The 25 largest energy efficiency financing companies based in the United States

Ranked by team size

Top 25 of 707 energy efficiency financing companies based in the United States, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to energy efficiency financing companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Ameresco	Partial evidence	Framingham, MA, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,383 contacts →
	Partial evidence “Ameresco, Inc.(NYSE:AMRC) is a leading energy infrastructure solutions provider dedicated to helping customers reduce costs, enhance resilience, and decarbonize to net zero in the…” Source: RevenueBase Database · checked Sep 16, 2026
2	Palmetto	Partial evidence	Charlotte, NC, United StatesHQ checked Sep 16, 2026	201-500	539 contacts →
	Partial evidence “Palmetto is a leading clean tech company on a mission to accelerate the transition to a clean energy future.” Source: RevenueBase Database · checked Sep 16, 2026
3	Posigen	Strong evidence	St. Rose, LA, United StatesHQ checked Sep 16, 2026	501-1,000	507 contacts →
	Strong evidence “PosiGen is the nation's leading residential solar and energy efficiency provider.” Source: RevenueBase Database · checked Sep 16, 2026
4	Budderfly	Strong evidence	Shelton, CT, United StatesHQ checked Sep 16, 2026	201-500	366 contacts →
	Strong evidence “Budderfly is redefining how energy efficiency, resilience, and grid participation can work together across America’s commercial sector.” Source: RevenueBase Database · checked Sep 16, 2026
5	Lime Energy	Partial evidence	Newark, NJ, United StatesHQ checked Sep 16, 2026	201-500	233 contacts →
	Partial evidence “Lime Energy is building a new energy future.” Source: RevenueBase Database · checked Sep 16, 2026
6	Dalkia Energy Solutions	Strong evidence	Beverly, MA, United StatesHQ checked Sep 16, 2026	201-500	210 contacts →
	Strong evidence “Dalkia Energy Solutions, a subsidiary of the EDF (Électricité de France) Group, is a national leader in energy efficiency and sustainability for commercial, industrial, and…” Source: RevenueBase Database · checked Sep 16, 2026
7	Bright Power	Strong evidence	New York, NY, United StatesHQ checked Sep 16, 2026	51-200	205 contacts →
	Strong evidence “Bright Power is a leading provider of energy efficiency and decarbonization solutions for the real estate industry.” Source: RevenueBase Database · checked Sep 16, 2026
8	Energy Management Collaborative EMC	Strong evidence	Minneapolis, MN, United StatesHQ checked Sep 16, 2026	201-500	193 contacts →
	Strong evidence “EMC manages and scales turnkey energy efficiency solutions for Fortune 500 clients across their North American portfolios.” Source: RevenueBase Database · checked Sep 16, 2026
9	Renew Financial	Strong evidence	Oakland, CA, United StatesHQ checked Sep 16, 2026	51-200	184 contacts →
	Strong evidence “Renew Financial pioneered the residential Property Assessed Clean Energy (PACE) program, an innovative financing solution that helps homeowners invest in energy efficiency, water…” Source: RevenueBase Database · checked Sep 16, 2026
10	Everbright	Partial evidence	Juno Beach, FL, United StatesHQ checked Sep 16, 2026	201-500	173 contacts →
	Partial evidence “EverBright is a new residential solar financing provider, dramatically simplifying the process with faster, more flexible, more affordable options for homeowners and the strength…” Source: RevenueBase Database · checked Sep 16, 2026
11	RISE	Strong evidence	Cranston, RI, United StatesHQ checked Sep 16, 2026	201-500	151 contacts →
	Strong evidence “RISE is a pioneer in the delivery of turnkey energy-efficiency services for residential, commercial and industrial facilities.” Source: RevenueBase Database · checked Sep 16, 2026
12	Synergy Companies	Strong evidence	Fresno, CA, United StatesHQ checked Sep 16, 2026	501-1,000	124 contacts →
	Strong evidence “Synergy Companies is the largest energy services companies in California and provides a comprehensive approach to energy efficiency and environmental solutions in both the…” Source: RevenueBase Database · checked Sep 16, 2026
13	Erus Energy	Partial evidence	Phoenix, AZ, United StatesHQ checked Sep 16, 2026	51-200	118 contacts →
	Partial evidence “Erus Energy helps building owners evaluate and finance investments in Solar Energy and other energy saving equipment.” Source: RevenueBase Database · checked Sep 16, 2026
14	Mosaic Joinmosaic.com	Partial evidence	Oakland, CA, United StatesHQ checked Sep 16, 2026	201-500	113 contacts →
	Partial evidence “100% clean energy across America - that’s our vision.” Source: RevenueBase Database · checked Sep 16, 2026
15	PSD	Strong evidence	Ithaca, NY, United StatesHQ checked Sep 16, 2026	51-200	112 contacts →
	Strong evidence “PSD is an energy efficiency services and technology company.” Source: RevenueBase Database · checked Sep 16, 2026
16	Sungage Financial	Partial evidence	Boston, MA, United StatesHQ checked Sep 16, 2026	51-200	103 contacts →
	Partial evidence “Sungage Financial provides industry-leading solar financing that's more than just a loan.” Source: RevenueBase Database · checked Sep 16, 2026
17	Ecosave	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 16, 2026	51-200	79 contacts →
	Partial evidence “Headquartered in Philadelphia, Ecosave is a leading global independent Energy-as-a-Service provider, offering free energy savings assessments, guaranteed savings, fixed price…” Source: RevenueBase Database · checked Sep 16, 2026
18	Onyx Renewables	Partial evidence	New York, NY, United StatesHQ checked Sep 16, 2026	51-200	67 contacts →
	Partial evidence “Onyx Renewables is a leading provider of predictable, affordable clean energy solutions nationwide.” Source: RevenueBase Database · checked Sep 16, 2026
19	Icon Power	Indirect evidence	Tempe, AZ, United StatesHQ checked Sep 16, 2026	51-200	65 contacts →
	Indirect evidence “Icon Power is the 5th fastest growing company in Arizona and #146 on the National INC list.” Source: RevenueBase Database · checked Sep 16, 2026
20	Energy Coordinating Agency ECA	Strong evidence	Philadelphia, PA, United StatesHQ checked Sep 16, 2026	51-200	64 contacts →
	Strong evidence “The Energy Coordinating Agency (ECA), a non-profit, is a regional leader in the delivery of energy efficiency services for residential stock.” Source: RevenueBase Database · checked Sep 16, 2026
21	SEMCO	Partial evidence	Birmingham, AL, United StatesHQ checked Sep 16, 2026	n/a	64 contacts →
	Partial evidence “If your business is interested in cutting energy costs and securing little known incentives to help fund initial project costs, SEMCO can help you.” Source: RevenueBase Database · checked Sep 16, 2026
22	Entegrity	Partial evidence	Little Rock, AR, United StatesHQ checked Sep 16, 2026	51-200	62 contacts →
	Partial evidence “Entegrity is an energy services, sustainability and solar development company specializing in the implementation of energy conservation and renewable energy projects.” Source: RevenueBase Database · checked Sep 16, 2026
23	Energy 350, INC	Strong evidence	Portland, OR, United StatesHQ checked Sep 16, 2026	51-200	60 contacts →
	Strong evidence “Energy 350 takes pride in performing high quality energy studies and energy efficiency related services for end users as well as program administrators.” Source: RevenueBase Database · checked Sep 16, 2026
24	Greengen	Partial evidence	Bethesda, MD, United StatesHQ checked Sep 16, 2026	11-50	60 contacts →
	Partial evidence “GreenGen is a global leader in energy and sustainability solutions, empowering organizations to Operate in the Green®.” Source: RevenueBase Database · checked Sep 16, 2026
25	Staples Energy	Partial evidence	Pewaukee, WI, United StatesHQ checked Sep 16, 2026	51-200	59 contacts →
	Partial evidence “Staples Energy helps commercial and residential customers, places of worship, and public facilities save hundreds of millions of kilowatt hours of energy.” Source: RevenueBase Database · checked Sep 16, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: energy efficiency financing companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names energy efficiency financing companies.
Partial evidence: Its own public description names part of energy efficiency financing companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name energy efficiency financing companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 707 energy efficiency financing companies based in the United States

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Energy efficiency financing companies based in the United States at a glance

As of Sep 16, 2026

43.1%Verified-email coverage

15.8Average contacts per company

1-10Median size (employees)

4.4%Largest-city concentration · New York

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

357

11-50

246

51-200

201-500

501-1,000

1,001-5,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 707 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among energy efficiency financing companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “energy efficiency financing companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names energy efficiency financing companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among energy efficiency financing companies, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 4,817 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 16, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Energy efficiency financing companies by metro

Energy efficiency financing companies in New York31

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names energy efficiency financing companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many energy efficiency financing companies are there based in the United States?

RevenueBase identified 707 energy efficiency financing companies headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Ameresco, headquartered in Framingham, tops this list with the largest team on record.

Which city has the most energy efficiency financing companies?

New York leads with 31 headquartered companies, followed by San Diego (14) and Austin (13).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 4,817 verified decision-maker contacts tracked across these 707 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 16, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.