Company lists · Data refreshed September 2026

Top 25 Data center energy efficiency companies based in the United States

RevenueBase identified 618 data center energy efficiency companies headquartered in the United States as of September 2026 and tracks 14,786 professional contacts across them, including 6,693 with verified work emails. New York is the largest hub.

This list covers data center energy efficiency 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
618Companies
14,786Contacts tracked
6,693Verified emails
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The 25 largest data center energy efficiency companies based in the United States

Ranked by team size
Top 25 of 618 data center energy efficiency 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 data center energy efficiency 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Strong evidenceAustin, TX, United StatesHQ checked Sep 16, 20261,001-5,0002,121 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 16, 2026
2Partial evidenceFramingham, MA, United StatesHQ checked Sep 16, 20261,001-5,0001,383 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
3Strong evidenceFranklin, WI, United StatesHQ checked Sep 16, 20261,001-5,000923 contacts →

Strong evidence

“We provide high-end technical and professional services for the entire lifecycle of data centers.”

Source: RevenueBase Database · checked Sep 16, 2026
4Indirect evidenceNew York, United StatesHQ checked Sep 16, 2026501-1,000803 contacts →

Indirect evidence

“Consult Engineer Commission At Syska Hennessy Group, we create exceptional environments.”

Source: RevenueBase Database · checked Sep 16, 2026
5Indirect evidenceHollywood, FL, United StatesHQ checked Sep 16, 2026201-500423 contacts →

Indirect evidence

“NV5 Mission Critical is a trusted leader in mission-critical design and commissioning management with a strong international presence.”

Source: RevenueBase Database · checked Sep 16, 2026
6Partial evidenceAshburn, VA, United StatesHQ checked Sep 16, 2026501-1,000353 contacts →

Partial evidence

“Hanley Energy are global innovators in Critical Power and Energy Management solutions, with a stable of world-class engineers shared between European headquarters in Ireland…”

Source: RevenueBase Database · checked Sep 16, 2026
7Partial evidencePortland, OR, United StatesHQ checked Sep 16, 2026201-500288 contacts →

Partial evidence

“At Cascade Energy, we believe in better.”

Source: RevenueBase Database · checked Sep 16, 2026
8Strong evidenceHouston, TX, United StatesHQ checked Sep 16, 2026201-500233 contacts →

Strong evidence

“At Mantis Innovation, our experts provide data-driven, consultative services designed to optimize your facility, sustainability, and energy management strategies, while ultimately…”

Source: RevenueBase Database · checked Sep 16, 2026
9Partial evidenceNewark, NJ, United StatesHQ checked Sep 16, 2026201-500233 contacts →

Partial evidence

“Lime Energy is building a new energy future.”

Source: RevenueBase Database · checked Sep 16, 2026
10Strong evidenceBeverly, MA, United StatesHQ checked Sep 16, 2026201-500210 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
11Strong evidenceNew York, NY, United StatesHQ checked Sep 16, 202651-200205 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
12Strong evidenceDallas, TX, United StatesHQ checked Sep 16, 2026501-1,000205 contacts →

Strong evidence

“Stream Data Centers has provided premium data center services since with 90% of its inventory leased to Fortune 100 customers.”

Source: RevenueBase Database · checked Sep 16, 2026
13Indirect evidenceSan Francisco, CA, United StatesHQ checked Sep 16, 202651-200199 contacts →

Indirect evidence

“We make technology work in buildings.”

Source: RevenueBase Database · checked Sep 16, 2026
14Strong evidenceChantilly, VA, United StatesHQ checked Sep 16, 202651-200195 contacts →

Strong evidence

“Compu Dynamics, since 1982, has been the go-to data center and facility management experts in Maryland, Virginia, and Washington, DC with teams of in-house, factory-trained, and…”

Source: RevenueBase Database · checked Sep 16, 2026
15Partial evidenceDallas, TX, United StatesHQ checked Sep 16, 2026201-500190 contacts →

Partial evidence

“At Cenergistic, energy conservation starts with people.”

Source: RevenueBase Database · checked Sep 16, 2026
16Strong evidenceFresno, CA, United StatesHQ checked Sep 16, 2026501-1,000124 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
17Partial evidenceLa Crosse, WI, United StatesHQ checked Sep 16, 202651-200121 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 16, 2026
18Partial evidenceRidgewood, NJ, United StatesHQ checked Sep 16, 202651-200119 contacts →

Partial evidence

“The future of humanity is dependent on making our energy infrastructure cleaner, more affordable, and more resilient.”

Source: RevenueBase Database · checked Sep 16, 2026
19Indirect evidenceGambrills, MD, United StatesHQ checked Sep 16, 2026201-500116 contacts →

Indirect evidence

“We make sustainable happen.”

Source: RevenueBase Database · checked Sep 16, 2026
20Strong evidenceMilford, OH, United StatesHQ checked Sep 16, 202651-200116 contacts →

Strong evidence

“We are a global provider of energy efficiency solutions for commercial buildings with five business offerings: HVAC Testing, Adjusting & Balancing, Intelli-Hood® Kitchen…”

Source: RevenueBase Database · checked Sep 16, 2026
21Strong evidenceIthaca, NY, United StatesHQ checked Sep 16, 202651-200112 contacts →

Strong evidence

“PSD is an energy efficiency services and technology company.”

Source: RevenueBase Database · checked Sep 16, 2026
22Indirect evidenceDurham, NC, United StatesHQ checked Sep 16, 202651-200106 contacts →

Indirect evidence

“Phononic, Inc.”

Source: RevenueBase Database · checked Sep 16, 2026
23Partial evidenceOakland, CA, United StatesHQ checked Sep 16, 202651-20097 contacts →

Partial evidence

“In 1998, I started kW Engineering as a two-person firm with a singular vision: to become the leading technical experts at saving money in buildings by saving energy and water.”

Source: RevenueBase Database · checked Sep 16, 2026
24Strong evidenceHouston, TX, United StatesHQ checked Sep 16, 202651-20096 contacts →

Strong evidence

“At E’kabel, we design and implement solutions that drive efficiency, sustainability, and performance across energy operations.”

Source: RevenueBase Database · checked Sep 16, 2026
25Strong evidenceKennesaw, GA, United StatesHQ checked Sep 16, 202651-20093 contacts →

Strong evidence

“Nlyte Software, a Carrier company, is the world's leading software company focused on planning, managing, and optimizing data centers.”

Source: RevenueBase Database · checked Sep 16, 2026

Showing 25 of 618 data center energy efficiency companies based in the United States

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Data center energy efficiency companies based in the United States at a glance

As of Sep 16, 2026
45.3%Verified-email coverage
23.9Average contacts per company
11-50Median size (employees)
3.4%Largest-city concentration · New York
Sep 16, 2026Page data refreshed

Companies by employee count

1-10
304
11-50
214
51-200
68
201-500
19
501-1,000
7
1,001-5,000
5

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 618 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 data center energy efficiency 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 “data center energy efficiency 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 data center energy efficiency 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 data center energy efficiency 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, 6,693 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.

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 data center energy efficiency 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 data center energy efficiency companies are there based in the United States?

RevenueBase identified 618 data center energy efficiency 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?

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

Which city has the most data center energy efficiency companies?

New York leads with 21 headquartered companies, followed by Chicago (14) and Dallas (14).

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 6,693 verified decision-maker contacts tracked across these 618 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.