Company lists · Data refreshed September 2026

Top 25 Energy efficiency investment firms worldwide

Name: Energy efficiency investment firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 2, 2026 2,390 companies tracked

RevenueBase identified 2,390 energy efficiency investment firms worldwide as of September 2026 and tracks 24,978 professional contacts across them, including 8,793 with verified work emails and 5,262 with mobile numbers. The United States is the largest market and London the largest hub.

This list covers energy efficiency investment firms worldwide, 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 2, 2026. Country and city lists for energy efficiency investment firms follow the table.

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 RevenueBase Smart Search rating on every row Refreshed Sep 2, 2026 86% judged on-target in blind review

2,390Companies

24,978Contacts tracked

8,793Verified emails

5,262Mobile numbers

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The 25 largest energy efficiency investment firms worldwide

Ranked by team size

Top 25 of 2,390 energy efficiency investment firms worldwide, ranked by team size, largest first. Data refreshed Sep 2, 2026. RevenueBase Smart Search rates how each company's information relates to energy efficiency investment firms: 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	Clearesult	Strong evidence	Toronto, ON, CA	1,001-5,000	2,137 contacts →
	Strong evidence “CLEAResult is the largest provider of energy efficiency, energy transition and energy sustainability services in North America.” Source: RevenueBase Database · checked Sep 2, 2026
2	Noresco	Partial evidence	Westminster, CO, US	201-500	484 contacts →
	Partial evidence “NORESCO, a part of Carrier Global Corporation, helps customers modernize aging building systems and upgrade energy and water infrastructure to meet evolving demands.” Source: RevenueBase Database · checked Sep 2, 2026
3	Veolia Industries Global Solutions	Partial evidence	Aubervilliers, FR	1,001-5,000	469 contacts →
	Partial evidence “Veolia Industries Global Solutions est devenu Veolia Energie Performance depuis le 1er juin 2025.” Source: RevenueBase Database · checked Sep 2, 2026
4	Budderfly	Strong evidence	Shelton, CT, US	201-500	359 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 2, 2026
5	Grupo Luminae Energia	Partial evidence	Osasco, BR	501-1,000	253 contacts →
	Partial evidence “Fundado em 2008 pelo engenheiro André Ferreira, o Grupo Luminae Energia é referência em eficiência energética na América Latina.” Source: RevenueBase Database · checked Sep 2, 2026
6	Lime Energy	Partial evidence	Newark, NJ, US	201-500	233 contacts →
	Partial evidence “Lime Energy is building a new energy future.” Source: RevenueBase Database · checked Sep 2, 2026
7	Prime Energy	Partial evidence	Sao Paulo, BR	51-200	227 contacts →
	Partial evidence “Empresa voltada a projetos de Otimização e Eficiêntização no uso da energia elétrica.” Source: RevenueBase Database · checked Sep 2, 2026
8	Dalkia Energy Solutions	Strong evidence	Beverly, MA, US	201-500	212 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 2, 2026
9	Bright Power	Strong evidence	New York, NY, US	51-200	200 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 2, 2026
10	Energy Management Collaborative EMC	Strong evidence	Minneapolis, MN, US	201-500	197 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 2, 2026
11	HASI	Partial evidence	New York, NY, US	51-200	194 contacts →
	Partial evidence “HASI invests in sustainable infrastructure assets advancing the energy transition.” Source: RevenueBase Database · checked Sep 2, 2026
12	Renew Financial	Strong evidence	Oakland, CA, US	51-200	189 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 2, 2026
13	ALD Bioenergia	Indirect evidence	Tangara Da Serra, BR	201-500	187 contacts →
	Indirect evidence “Nosso propósito é impulsionar a transformação em direção a um futuro renovável e sustentável, trabalhando incansavelmente para desenvolver soluções inovadoras que contribuam para…” Source: RevenueBase Database · checked Sep 2, 2026
14	Clean Energy Finance Corporation	Indirect evidence	Sydney, AU	51-200	170 contacts →
	Indirect evidence “The CEFC is Australia’s specialist climate investor, helping cut emissions in the race towards net zero by 2050.” Source: RevenueBase Database · checked Sep 2, 2026
15	Paul Tech AG	Indirect evidence	Berlin, DE	51-200	154 contacts →
	Indirect evidence “Die PAUL Tech AG mit Sitz in Mannheim macht Bestandsimmobilien grün und werthaltig.” Source: RevenueBase Database · checked Sep 2, 2026
16	Octopus Energy Generation	Partial evidence	London, GB	201-500	152 contacts →
	Partial evidence “At Octopus Energy Generation, we’re building green power for the future, from large-scale solar to onshore and offshore wind, and innovative initiatives like the Fan Club.” Source: RevenueBase Database · checked Sep 2, 2026
17	accenta.ai	Indirect evidence	Boulogne-Billancourt, FR	51-200	151 contacts →
	Indirect evidence “Accenta aide les acteurs de l’immobilier à maîtriser leurs charges, valoriser leurs actifs et répondre aux exigences réglementaires, grâce à la performance énergie-carbone.” Source: RevenueBase Database · checked Sep 2, 2026
18	RISE	Strong evidence	Cranston, RI, US	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 2, 2026
19	British Solar Renewables	Partial evidence	Brisbane, AU	51-200	145 contacts →
	Partial evidence “Clean energy, powered with purpose.” Source: RevenueBase Database · checked Sep 2, 2026
20	City Green Light	Strong evidence	Vicenza, IT	51-200	139 contacts →
	Strong evidence “City Green Light è un Gruppo che opera nel campo del risparmio e dell'efficientamento energetico, partecipata da primari fondi di investimento nazionali e internazionali…” Source: RevenueBase Database · checked Sep 2, 2026
21	Energy Impact Partners	Partial evidence	San Francisco, CA, US	51-200	135 contacts →
	Partial evidence “Energy Impact Partners LP (EIP) is a global energy technology investor with a proprietary model designed to drive innovation.” Source: RevenueBase Database · checked Sep 2, 2026
22	Certinergy	Indirect evidence	La Garenne-Colombes, FR	51-200	134 contacts →
	Indirect evidence “Depuis sa création en 2008, CertiNergy se mobilise pour impulser et mettre en œuvre des actions d’économies d’énergie pour tous les consommateurs d’énergie, du particulier à…” Source: RevenueBase Database · checked Sep 2, 2026
23	Synergy Companies	Strong evidence	Fresno, CA, US	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 2, 2026
24	ECP Energy Capital Partners	Partial evidence	New York City, NY, US	51-200	123 contacts →
	Partial evidence “ECP (Energy Capital Partners) is an investor in critical infrastructure focused on electrification, decarbonization, reliability and sustainability.” Source: RevenueBase Database · checked Sep 2, 2026
25	Michaels Energy- An Inc. 5000 Company	Partial evidence	La Crosse, WI, US	51-200	120 contacts →
	Partial evidence “Michaels Energy is a veteran-owned energy consulting firm that exists to help businesses minimize waste and maximize value.” Source: RevenueBase Database · checked Sep 2, 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 investment firms. 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 investment firms.
Partial evidence: Its own public description names part of energy efficiency investment firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name energy efficiency investment firms. 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 2,390 energy efficiency investment firms worldwide

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Energy efficiency investment firms worldwide at a glance

As of Sep 2, 2026

35.2%Verified-email coverage

21.1%Mobile-number coverage

10.5Average contacts per company

1-10Median size (employees)

3.8%Largest-city concentration · London

Sep 2, 2026Page data refreshed

Companies by employee count

1-10

1,371

11-50

777

51-200

161

201-500

501-1,000

1,001-5,000

5,001-10,000

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 investment firms, 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.
Coverage: 15 countries, largest first: the United States, Italy, the United Kingdom, Spain, France, Germany, Brazil, Australia, Canada, the Netherlands and 5 more. Country and city lists for energy efficiency investment firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “energy efficiency investment firms”. 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 investment firms), 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 investment firms, and records with no verified work email.
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, 8,793 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 between September 2, 2026 and September 14, 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 investment firms by location

18 lists · largest first

Every Energy efficiency investment firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 investment firms, 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 investment firms are there worldwide?

RevenueBase identified 2,390 energy efficiency investment firms worldwide 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?

Clearesult, headquartered in Toronto, tops this list with the largest team on record.

Which country has the most energy efficiency investment firms?

The United States leads with 674 companies, followed by Italy (244) and the United Kingdom (243). Every energy efficiency investment firms list by country and city is linked on this page.

Which city has the most energy efficiency investment firms?

London leads with 90 headquartered companies, followed by Paris (51) and Madrid (49).

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 8,793 verified decision-maker contacts tracked across these 2,390 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled from the company graph between September 2, 2026 and September 14, 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.