Company lists · Data refreshed September 2026

Top 25 Climate strategy consulting firms based in Washington, United States

Name: Climate strategy consulting firms based in Washington, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 142 companies tracked

RevenueBase identified 142 climate strategy consulting firms headquartered in Washington, United States as of September 2026 and tracks 1,073 professional contacts across them, including 548 with verified work emails. New York is the largest hub.

This list covers climate strategy consulting firms headquartered in Washington, 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 21, 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 21, 2026 86% judged on-target in blind review

142Companies

1,073Contacts tracked

548Verified emails

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The 25 largest climate strategy consulting firms based in Washington, United States

Ranked by team size

Top 25 of 142 climate strategy consulting firms based in Washington, United States, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to climate strategy consulting 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	Synergy Consulting, INC	Partial evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	51-200	434 contacts →
	Partial evidence “Synergy Consulting is Global Leader in Financial and Corporate Advisory.” Source: RevenueBase Database · checked Sep 21, 2026
2	Baumann Consulting	Partial evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	51-200	63 contacts →
	Partial evidence “Baumann Consulting is driven to deliver solutions for a carbon-neutral real estate industry.” Source: RevenueBase Database · checked Sep 21, 2026
3	Browning Environmental Communications	Indirect evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	11-50	24 contacts →
	Indirect evidence “Browning Environmental Communications (Browning) is an international full-service marketing communications agency specializing in clean energy and environmental sustainability.” Source: RevenueBase Database · checked Sep 21, 2026
4	Northbridge	Indirect evidence	Washington, United StatesHQ checked Sep 21, 2026	11-50	24 contacts →
	Indirect evidence “At Northbridge, we provide our clients with the tools and expertise to help solve complex financial, policy, and environmental challenges.” Source: RevenueBase Database · checked Sep 21, 2026
5	Crowell Global Advisors	Indirect evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	11-50	23 contacts →
	Indirect evidence “At Crowell Global Advisors, we guide our clients to navigate complex global challenges, unlock new opportunities, and deliver on their promises.” Source: RevenueBase Database · checked Sep 21, 2026
6	The Clark Group LLC	Partial evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	11-50	19 contacts →
	Partial evidence “The Clark Group is an environmental policy consulting firm that provides a broad range of services to government, private and nonprofit clients.” Source: RevenueBase Database · checked Sep 21, 2026
7	E&w LAW	Partial evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	11-50	18 contacts →
	Partial evidence “At Earth & Water, we are more than lawyers – we’re strategic advisors with unique experience who advance our clients’ interests across a broad range of environmental and business…” Source: RevenueBase Database · checked Sep 21, 2026
8	Sustainable Capital Advisors	Strong evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	11-50	14 contacts →
	Strong evidence “Sustainable Capital Advisors (SCA) is a strategy consulting and financial advisory firm focused on delivering innovative capital solutions for the sustainable infrastructure…” Source: RevenueBase Database · checked Sep 21, 2026
9	Climate Advisers	Partial evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	11-50	14 contacts →
	Partial evidence “Climate Advisers brings together globally recognized climate thought leaders on US policy and politics, international diplomacy, tropical forests and other nature-based solutions…” Source: RevenueBase Database · checked Sep 21, 2026
10	Co2efficient	Indirect evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	1-10	14 contacts →
	Indirect evidence “CO2EFFICIENT LLC (COEFFICIENT) was founded in 2017 as a mission-focused Washington, D.C.” Source: RevenueBase Database · checked Sep 21, 2026
11	Sustainable YOU	Strong evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	51-200	14 contacts →
	Strong evidence “Sustainable You is a national strategic consulting firm in solar and sustainability serving residential and small commercial clients with a focus in the DC, Maryland and Virginia…” Source: RevenueBase Database · checked Sep 21, 2026
12	Potomac International Partners, INC	Partial evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	11-50	14 contacts →
	Partial evidence “Potomac International Partners is a multidisciplinary consulting firm that matches ideas with needs and creates opportunities from challenges.” Source: RevenueBase Database · checked Sep 21, 2026
13	Blackwoods Group	Partial evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	1-10	14 contacts →
	Partial evidence “Blackwoods Group is an agriculture and natural resource consulting firm that provides a variety of services ranging from government relations to development and implementation of…” Source: RevenueBase Database · checked Sep 21, 2026
14	Innovative Federal Strategies	Partial evidence	Washington, United StatesHQ checked Sep 21, 2026	11-50	13 contacts →
	Partial evidence “Innovative Federal Strategies provides big firm results with a small firm feel.” Source: RevenueBase Database · checked Sep 21, 2026
15	Hillstaffer, LLC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	11-50	13 contacts →
	Indirect evidence “Navigating complex policy landscapes?” Source: RevenueBase Database · checked Sep 21, 2026
16	Blue Star Strategies, LLC	Partial evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	11-50	12 contacts →
	Partial evidence “Based in Washington, DC and with offices in Europe and Latin America, Blue Star Strategies, LLC provides advice and counsel to global corporations, sovereign governments, NGOs…” Source: RevenueBase Database · checked Sep 21, 2026
17	Sustainable Strategies DC	Strong evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	1-10	11 contacts →
	Strong evidence “Sustainable Strategies DC is a government affairs and strategic consulting firm based in Washington, DC, that helps clients secure resources for community revitalization and tools…” Source: RevenueBase Database · checked Sep 21, 2026
18	Green Strategies, INC	Partial evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	1-10	8 contacts →
	Partial evidence “Green Strategies Inc.” Source: RevenueBase Database · checked Sep 21, 2026
19	Center For Climate Strategies	Strong evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	11-50	8 contacts →
	Strong evidence “The Center for Climate Strategies provides high-level support for planning, analysis, and implementation of climate, energy, and economic programs in partnership with government…” Source: RevenueBase Database · checked Sep 21, 2026
20	The Climate Board	Partial evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	11-50	7 contacts →
	Partial evidence “The Climate Board builds AI-enhanced data products for corporate climate teams, closing the gap between infrequent assessments and real-time risk.” Source: RevenueBase Database · checked Sep 21, 2026
21	Adaptation Leader	Partial evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	11-50	7 contacts →
	Partial evidence “We provide services to leaders of organizations that want to plan and implement climate adaptation actions to protect and maximize their investments across their programs…” Source: RevenueBase Database · checked Sep 21, 2026
22	Partnership International, INC	Partial evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	11-50	7 contacts →
	Partial evidence “Partnership International, Inc, founded in 1990, is an international consulting firm that provides socio-economic, regulatory, institutional, technical, commercial and financial…” Source: RevenueBase Database · checked Sep 21, 2026
23	Clima Capital Partners LLC	Partial evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	11-50	7 contacts →
	Partial evidence “Clima Capital Partners LLC (CLIMA) advises and creates sustainable value for local economies and communities through robust climate finance solutions, managing and mitigating…” Source: RevenueBase Database · checked Sep 21, 2026
24	Green Capitol	Indirect evidence	Washington, United StatesHQ checked Sep 21, 2026	1-10	7 contacts →
	Indirect evidence “Green Capitol LLC works on sustainable development policy at the state, federal and international levels, serving clients on agriculture, energy and environment concerns via…” Source: RevenueBase Database · checked Sep 21, 2026
25	Energy Shrink, LLC	Partial evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	1-10	6 contacts →
	Partial evidence “Energy Shrink is an environmental consulting practice specialized in sustainability and energy efficiency in buildings, that is, high-performance or green buildings.” Source: RevenueBase Database · checked Sep 21, 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: climate strategy consulting 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 climate strategy consulting firms.
Partial evidence: Its own public description names part of climate strategy consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name climate strategy consulting 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 142 climate strategy consulting firms based in Washington, United States

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Climate strategy consulting firms based in Washington, United States at a glance

As of Sep 21, 2026

51.1%Verified-email coverage

7.6Average contacts per company

1-10Median size (employees)

120.4%Largest-city concentration · New York

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

501-1,000

Email recency for this list is measured across the whole United States list rather than for Washington, so it is reported there. Company counts and contact totals on this page are exact for Washington, over 142 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 climate strategy consulting 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.
What qualifies: Companies headquartered in Washington, United States whose own description of what they do matches “climate strategy consulting 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 climate strategy consulting 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 climate strategy consulting firms, and records with no verified work email. Companies headquartered outside Washington 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, 548 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 21, 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.

Climate strategy consulting firms by metro in the United States

Climate strategy consulting firms in New York171
Climate strategy consulting firms in Washington142
Climate strategy consulting firms in Chicago76
Climate strategy consulting firms in Houston71
Climate strategy consulting firms in San Francisco55
Climate strategy consulting firms in Los Angeles54
Climate strategy consulting firms in Seattle51
Climate strategy consulting firms in Atlanta44
Climate strategy consulting firms in Denver41
Climate strategy consulting firms in Portland39
Climate strategy consulting firms in Boston38
Climate strategy consulting firms in Miami38
Climate strategy consulting firms in Austin35
Climate strategy consulting firms in New York City28

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 climate strategy consulting 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 climate strategy consulting firms are there based in Washington, United States?

RevenueBase identified 142 climate strategy consulting firms headquartered in Washington, 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?

Synergy Consulting, INC, headquartered in Washington, tops this list with the largest team on record.

Which city has the most climate strategy consulting firms?

New York leads with 171 headquartered companies, followed by Washington (142) and Chicago (76).

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 548 verified decision-maker contacts tracked across these 142 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 21, 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.