Company lists · Data refreshed September 2026

Top 25 Net zero implementation consultancies based in the United States

RevenueBase identified 575 company matches for net zero implementation consultancies associated with the United States as of September 2026 and tracks 7,021 professional contacts across them, including 2,888 with verified work emails. New York is the largest hub.

This list covers company matches for net zero implementation consultancies 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 29, 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 29, 2026 How this list was built
575Companies
7,021Contacts tracked
2,888Verified emails
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The 25 largest net zero implementation consultancies based in the United States

Ranked by team size
Top 25 of 575 company matches for net zero implementation consultancies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 29, 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 matchAustin, TX, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
2Exact matchOakland, CA, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
3Exact matchIrvine, CA, United StatesHQ recorded Sep 29, 2026201-500383 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
4Exact matchPortland, OR, United StatesHQ recorded Sep 29, 2026201-500288 contacts →

Exact match

“At Cascade Energy, we believe in better.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
5Exact matchKirkland, WA, United StatesHQ recorded Sep 29, 2026201-500254 contacts →

Exact match

“We provide global renewable energy consulting services, focused on empowering clients to navigate the complexities of the energy transition.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
6Exact matchNew York, NY, United StatesHQ recorded Sep 29, 2026201-500233 contacts →

Exact match

“As of November of 2025, AMA Group has merged with CMTA!”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
7Exact matchSan Francisco, CA, United StatesHQ recorded Sep 29, 202651-200141 contacts →

Exact match

“Stok leads organizations to decarbonize now.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
8Exact matchSeattle, WA, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
9Exact matchDes Moines, IA, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
10Exact matchNew Hope, MN, United StatesHQ recorded Sep 29, 202651-200107 contacts →

Exact match

“Apadana was founded in 2013 by electrical and mechanical engineers who committed their expertise to delivering energy conservation and renewable energy generation solutions with a…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
11Exact matchNew York, NY, United StatesHQ recorded Sep 29, 202651-20098 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 29, 2026 · View company records in RevenueBase
12Exact matchHouston, TX, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
13Exact matchDenver, CO, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
14Exact matchWashington, DC, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
15Exact matchNew York, NY, United StatesHQ recorded Sep 29, 202651-20062 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
16Exact matchPortland, OR, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
17Exact matchBethesda, MD, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
18Exact matchAustin, TX, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
19Exact matchLos Angeles, CA, United StatesHQ recorded Sep 29, 202651-20057 contacts →

Exact match

“Partner Energy, Inc.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
20Exact matchPittsburgh, PA, United StatesHQ recorded Sep 29, 202611-5056 contacts →

Exact match

“3R Sustainability is a women-owned business providing consulting services rooted in science, supported by data, and driven by innovation, education, and continual improvement…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
21Exact matchNew York, NY, United StatesHQ recorded Sep 29, 202611-5049 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 29, 2026 · View company records in RevenueBase
22Exact matchNewport Beach, CA, United StatesHQ recorded Sep 29, 202651-20047 contacts →

Exact match

“Altura is a new breed of engineering consulting firm, delivering everything it takes to guide owners to realizing climate and carbon goals by improving energy, environmental, and…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
23Exact matchNew York, NY, United StatesHQ recorded Sep 29, 202611-5047 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
24Exact matchAtlanta, GA, United StatesHQ recorded Sep 29, 202611-5043 contacts →

Exact match

“At Spectreco, our ethos revolves around simplicity, speed, sprint, and trust.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
25Exact matchMaitland, FL, United StatesHQ recorded Sep 29, 202651-20040 contacts →

Exact match

“As of September 2024, OCI Associates has merged with CMTA!”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase

Showing 25 of 575 net zero implementation consultancies based in the United States

See the full list, filter by size, metro and specialty, and access 2,888 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Net zero implementation consultancies based in the United States at a glance

As of Sep 29, 2026
41.1%Verified-email coverage
12.2Average contacts per company
1-10Median size (employees)
8.2%Largest-city concentration · New York
Sep 29, 2026Page data refreshed

Companies by employee count

1-10
418
11-50
120
51-200
28
201-500
5
501-1,000
2
10001+
1

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 575 companies.

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 implementation consultancies” 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 2,888 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 29, 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.

Net zero implementation consultancies by metro

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 implementation consultancies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many net zero implementation consultancies are there based in the United States?

RevenueBase identified 575 company matches for net zero implementation consultancies 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?

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

Which city has the most net zero implementation consultancies?

New York leads with 47 company records, followed by Chicago (22) and Los Angeles (18).

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 2,888 professional contacts with verified work emails tracked across these 575 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 29, 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.