Company lists · Data refreshed September 2026

Top 25 Energy efficiency consulting firms based in New York, United States

Name: Energy efficiency consulting firms based in New York, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 12, 2026 93 companies tracked

RevenueBase identified 93 company matches for energy efficiency consulting firms associated with New York, United States as of September 2026 and tracks 1,946 professional contacts across them, including 1,096 with verified work emails and 808 with mobile numbers. Across the United States, New York is the largest hub for this category.

This list covers company matches for energy efficiency consulting firms associated with New York, United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 12, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 SmartSearch · Exact Recorded Sep 12, 2026 How this list was built

93Companies

1,946Contacts tracked

1,096Verified emails

808Mobile numbers

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The 25 largest energy efficiency consulting firms based in New York, United States

Ranked by team size

Top 25 of 93 company matches for energy efficiency consulting firms based in New York, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 12, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Syska Hennessy Group	Exact match	New York, United StatesHQ recorded Sep 12, 2026	501-1,000	803 contacts →
	Exact match “Consult Engineer Commission At Syska Hennessy Group, we create exceptional environments.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
2	Bright Power	Exact match	New York, NY, United StatesHQ recorded Sep 12, 2026	51-200	205 contacts →
	Exact match “Bright Power is a leading provider of energy efficiency and decarbonization solutions for the real estate industry.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
3	Environ Energy	Exact match	New York, NY, United StatesHQ recorded Sep 12, 2026	51-200	98 contacts →
	Exact match “Environ Energy is a leader in accelerating global sustainable energy transformation for more than 30 years.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
4	En-Power Group	Exact match	New York, NY, United StatesHQ recorded Sep 12, 2026	51-200	75 contacts →
	Exact match “We help building owners cut carbon, reduce costs, and stay compliant.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
5	Codegreen	Exact match	New York, NY, United StatesHQ recorded Sep 12, 2026	51-200	72 contacts →
	Exact match “CodeGreen is a leading national sustainability and energy efficiency consulting firm.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
6	Energy Infrastructure Partners LLC	Exact match	New York, NY, United StatesHQ recorded Sep 12, 2026	11-50	49 contacts →
	Exact match “Founded in 2011, Energy Infrastructure Partners (EIP) began with a clear premise: utilities, governments, and large energy users need a partner who is as committed to technical…” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
7	Highmark Building Efficiency	Exact match	New York, NY, United StatesHQ recorded Sep 12, 2026	11-50	43 contacts →
	Exact match “HIGHMARK’s mission is to support building sustainability, electrification, decarbonization and cost savings.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
8	F & D Partners, INC	Exact match	New York, United StatesHQ recorded Sep 12, 2026	51-200	30 contacts →
	Exact match “F&D Partners is a leading energy consultant in many deregulated US states, Canada, Mexico, the UK and Ireland.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
9	Carleton Energy Consulting	Exact match	New York, NY, United StatesHQ recorded Sep 12, 2026	11-50	29 contacts →
	Exact match “Carleton Energy specializes in Local Law 87 & Local Law 84 benchmarking compliance.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
10	Energy Economic Development Corporation	Exact match	New York, NY, United StatesHQ recorded Sep 12, 2026	1-10	23 contacts →
	Exact match “The Energy Economic Development Corporation delivers cost-saving energy efficiency retrofits that place minimal burden on building owners and managers.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
11	Firstservice Energy	Exact match	New York, NY, United StatesHQ recorded Sep 12, 2026	11-50	21 contacts →
	Exact match “FirstService Energy is the energy management and advisory affiliate of FirstService Residential the largest manager of residential communities in North America.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
12	Altanova	Exact match	New York, NY, United StatesHQ recorded Sep 12, 2026	11-50	19 contacts →
	Exact match “Altanova is a sustainability firm with consulting and engineering capabilities.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
13	Orange Energizing Solutions	Exact match	New York, NY, United StatesHQ recorded Sep 12, 2026	11-50	19 contacts →
	Exact match “Orange Energizing Solutions (OES) is a leading provider and installer of cost effective energy efficient solutions for all commercial refrigeration businesses.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
14	Smith Engineering, Pllc	Exact match	New York, NY, United StatesHQ recorded Sep 12, 2026	11-50	16 contacts →
	Exact match “Smith Engineering’s goal is to challenge the status quo.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
15	Solo Energy & Electrical	Exact match	New York, United StatesHQ recorded Sep 12, 2026	11-50	15 contacts →
	Exact match “SOLO is a sustainable energy service company specializing in energy efficiency, electrification, and renewable solutions.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
16	Sunlight Energy Group	Exact match	New York, NY, United StatesHQ recorded Sep 12, 2026	1-10	13 contacts →
	Exact match “Sunlight Energy Group works with companies to lower costs by developing powerful energy management plans that reduce usage, secure the best rates, and leverage emerging…” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
17	Werpo Solutions	Exact match	New York, NY, United StatesHQ recorded Sep 12, 2026	11-50	12 contacts →
	Exact match “Werpo is a full-service design-and-build energy conservation firm providing cost-effective solutions for our clients.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
18	IAG Energy	Exact match	New York, NY, United StatesHQ recorded Sep 12, 2026	11-50	10 contacts →
	Exact match “At iAG Energy we believe in making energy efficiency simple.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
19	Greenwich Energy Solutions	Exact match	New York, NY, United StatesHQ recorded Sep 12, 2026	1-10	10 contacts →
	Exact match “Greenwich Energy Solutions delivers greening and energy efficiency services for commercial and multifamily buildings anywhere in the United States.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
20	Mosto Technologies	Exact match	New York, NY, United StatesHQ recorded Sep 12, 2026	1-10	8 contacts →
	Exact match “Mosto Technologies Inc.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
21	LC Associates	Exact match	New York, NY, United StatesHQ recorded Sep 12, 2026	11-50	7 contacts →
	Exact match “LC Associates is the premiere energy services company in New York City and beyond!” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
22	Triple NET Energy	Exact match	New York, NY, United StatesHQ recorded Sep 12, 2026	1-10	6 contacts →
	Exact match “Triple Net Energy Advisory Services (TNE) is one of the most experienced energy engineering and advanced metering infrastructure technologies firms in the Tri-State area with a…” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
23	Ko2 Consulting	Exact match	New York, NY, United StatesHQ recorded Sep 12, 2026	1-10	5 contacts →
	Exact match “KO2 Consulting provides strategic energy consultant services for government agencies, non- profit organizations and private companies to achieve organizational energy performance…” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
24	Slattery Energy Consulting Group, INC	Exact match	New York, NY, United StatesHQ recorded Sep 12, 2026	1-10	5 contacts →
	Exact match “Slattery Energy Consulting Group leverages over three decades of experience to offer intelligent energy bill auditing, competitive natural gas and electricity procurement, energy…” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
25	FS Energy, LLC	Exact match	New York, NY, United StatesHQ recorded Sep 12, 2026	11-50	5 contacts →
	Exact match “FS Energy, LLC, a subsidiary of FirstService Corporation, takes a unique, holistic approach to energy management by applying state-of-the-art data analysis to evaluate a…” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “energy efficiency consulting firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 93 energy efficiency consulting firms based in New York, United States

See the full list, filter by size, metro and specialty, and access 1,096 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Energy efficiency consulting firms based in New York, United States at a glance

As of Sep 12, 2026

56.3%Verified-email coverage

41.5%Mobile-number coverage

20.9Average contacts per company

11-50Median size (employees)

Sep 12, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 14.0d

9320–30

15231–60

761–90

090–180

5180+

Company record updated

Median 51.0d

00–30

1,07731–60

60161–90

16190–180

107180+

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with New York, United States whose business descriptions match “energy efficiency consulting firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 1,096 professional contacts with verified work emails across the full matched dataset. 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 12, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Energy efficiency consulting firms by metro in the United States

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “energy efficiency consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many energy efficiency consulting firms are there based in New York, United States?

RevenueBase identified 93 company matches for energy efficiency consulting firms associated with New York, United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Syska Hennessy Group tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United States has the most energy efficiency consulting firms?

New York leads the United States with 91 company records, followed by Houston (69) and Chicago (38).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 1,096 professional contacts with verified work emails tracked across these 93 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 12, 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 SmartSearch, 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.