Company lists · Data refreshed September 2026

Top 25 Net zero consulting firms based in the United States

RevenueBase identified 747 company matches for net zero consulting firms associated with the United States as of September 2026 and tracks 11,622 professional contacts across them, including 5,661 with verified work emails and 4,798 with mobile numbers. New York is the largest hub.

This list covers company matches for net zero consulting firms associated with the 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 5, 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 5, 2026 How this list was built
747Companies
11,622Contacts tracked
5,661Verified emails
4,798Mobile numbers
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The 25 largest net zero consulting firms based in the United States

Ranked by team size
Top 25 of 747 company matches for net zero consulting firms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 5, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchSeattle, WA, United StatesHQ recorded Sep 5, 20261,001-5,0002,213 contacts →

Exact match

“We're a national construction and energy services company dedicated to innovating the waste and climate harm out of the built environment.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
2Exact matchAustin, TX, United StatesHQ recorded Sep 5, 2026n/a1,145 contacts →

Exact match

“OLA Sustainability, LLC OLA Sustainability is a consulting firm that focuses on integrating sustainable practices into commercial and multifamily design projects.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
3Exact matchPort Washington, WI, United StatesHQ recorded Sep 5, 20261,001-5,000838 contacts →

Exact match

“Franklin Energy delivers end-to-end sustainability solutions through a portfolio of intelligent products and services that lower energy costs, reduce carbon and waste, and grow…”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
4Exact matchOakland, CA, United StatesHQ recorded Sep 5, 2026201-500772 contacts →

Exact match

“Our mission is simple - to combat climate change through market-based, cost-effective energy, carbon, and water management solutions that make big impacts.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
5Exact matchIrvine, CA, United StatesHQ recorded Sep 5, 2026201-500383 contacts →

Exact match

“We are Trio – built from Edison Energy, Alfa Energy, and Altenex Energy.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
6Exact matchPark Ridge, NJ, United StatesHQ recorded Sep 5, 2026201-500336 contacts →

Exact match

“National Utility Service, Inc.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
7Exact matchSan Francisco, CA, United StatesHQ recorded Sep 5, 2026201-500324 contacts →

Exact match

“3Degrees is a leading global climate solutions provider, pioneer of environmental markets, and Certified B Corporation.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
8Exact matchPortland, OR, United StatesHQ recorded Sep 5, 2026201-500288 contacts →

Exact match

“At Cascade Energy, we believe in better.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
9Exact matchSan Francisco, CA, United StatesHQ recorded Sep 5, 202651-200156 contacts →

Exact match

“Energy.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
10Exact matchSan Francisco, CA, United StatesHQ recorded Sep 5, 202651-200141 contacts →

Exact match

“Stok leads organizations to decarbonize now.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
11Exact matchLa Crosse, WI, United StatesHQ recorded Sep 5, 202651-200121 contacts →

Exact match

“Michaels Energy is a veteran-owned energy consulting firm that exists to help businesses minimize waste and maximize value.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
12Exact matchSeattle, WA, United StatesHQ recorded Sep 5, 202651-200110 contacts →

Exact match

“Cascadia Consulting Group is a majority women-owned consulting firm specializing in environmental and sustainability solutions.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
13Exact matchDes Moines, IA, United StatesHQ recorded Sep 5, 202651-200109 contacts →

Exact match

“EcoEngineers, an LRQA company, is a consulting, auditing, and advisory firm with an exclusive focus on the energy transition and decarbonization.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
14Exact matchOakland, CA, United StatesHQ recorded Sep 5, 202651-20097 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
15Exact matchHouston, TX, United StatesHQ recorded Sep 5, 202651-20096 contacts →

Exact match

“ClimeCo is an award-winning leader in decarbonization, empowering global organizations with customized sustainability pathways.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
16Exact matchCarlsbad, CA, United StatesHQ recorded Sep 5, 202651-20089 contacts →

Exact match

“Verdani Partners is a full service sustainability consulting firm specialized in corporate sustainability, LEED certification and greening and retrofitting existing buildings.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
17Exact matchDenver, CO, United StatesHQ recorded Sep 5, 202611-5075 contacts →

Exact match

“Group14 Engineering is a Denver-based consulting firm committed to inspiring better buildings where people thrive.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
18Exact matchWashington, DC, United StatesHQ recorded Sep 5, 202651-20063 contacts →

Exact match

“Baumann Consulting is driven to deliver solutions for a carbon-neutral real estate industry.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
19Exact matchNew York, NY, United StatesHQ recorded Sep 5, 202651-20062 contacts →

Exact match

“Welcome to Cognitud, where purpose-driven consulting meets global impact.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
20Exact matchPortland, OR, United StatesHQ recorded Sep 5, 202651-20061 contacts →

Exact match

“Recognized for advanced subject matter expertise, wide-ranging technical resources, creative problem-solving, and excellence in professional practice, Brightworks Sustainability…”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
21Exact matchBethesda, MD, United StatesHQ recorded Sep 5, 202611-5060 contacts →

Exact match

“GreenGen is a global leader in energy and sustainability solutions, empowering organizations to Operate in the Green®.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
22Exact matchBethesda, MD, United StatesHQ recorded Sep 5, 202651-20059 contacts →

Exact match

“Coho, an ERM Group company, is a global climate adviser dedicated to helping clients navigate complexity and take ambitious steps on their climate journey.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
23Exact matchAustin, TX, United StatesHQ recorded Sep 5, 202611-5058 contacts →

Exact match

“We believe that what’s good for our planet is good for business.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
24Exact matchLos Angeles, CA, United StatesHQ recorded Sep 5, 202651-20057 contacts →

Exact match

“Partner Energy, Inc.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase
25Exact matchSan Francisco, CA, United StatesHQ recorded Sep 5, 202651-20056 contacts →

Exact match

“SINAI Technologies Inc.”

Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase

Showing 25 of 747 net zero consulting firms based in the United States

See the full list, filter by size, metro and specialty, and access 5,661 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Net zero consulting firms based in the United States at a glance

As of Sep 5, 2026
48.7%Verified-email coverage
41.3%Mobile-number coverage
15.6Average contacts per company
1-10Median size (employees)
7.4%Largest-city concentration · New York
Sep 5, 2026Page data refreshed

Companies by employee count

1-10
532
11-50
166
51-200
36
201-500
6
501-1,000
2
1,001-5,000
4

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

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 the United States whose business descriptions match “net zero 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 5,661 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 5, 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.

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 “net zero consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many net zero consulting firms are there based in the United States?

RevenueBase identified 747 company matches for net zero consulting firms associated with the 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?

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

Which city has the most net zero consulting firms?

New York leads with 55 company records, followed by Chicago (29) and Los Angeles (24).

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 5,661 professional contacts with verified work emails tracked across these 747 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 5, 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.