Company lists · Data refreshed September 2026
Top 25 Climate action consulting firms based in Seattle, United States
RevenueBase identified 64 climate action consulting firms headquartered in Seattle, United States as of September 2026 and tracks 437 professional contacts across them, including 272 with verified work emails. New York is the largest hub.
This list covers climate action consulting firms headquartered in Seattle, 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.
The 25 largest climate action consulting firms based in Seattle, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 110 contacts → | ||||
Partial evidence “Cascadia Consulting Group is a majority women-owned consulting firm specializing in environmental and sustainability solutions.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 2 | 48 contacts → | ||||
Partial evidence “Floyd|Snider is a multi-disciplinary environmental consulting firm providing engineering, strategic project management, and scientific expertise to achieve balanced solutions to…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 3 | 34 contacts → | ||||
Indirect evidence “Why does Intentional Futures exist?” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 4 | 33 contacts → | ||||
Partial evidence “SoundEarth is a 100% employee-owned environmental consulting firm with more than 40 dedicated and talented professionals working together to improve the environment in which we…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 5 | 30 contacts → | ||||
Partial evidence “Ecotope has provided sustainable building design consulting and engineering services in the Pacific Northwest for over 40 years.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 6 | 22 contacts → | ||||
Partial evidence “At Delta E, we specialize in a diverse range of consulting services, including Sustainability, Carbon consulting, Energy services, and design expertise in Mechanical, Electrical…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 7 | 15 contacts → | ||||
Partial evidence “RyeStrategy specializes in helping small-medium sized businesses fulfill climate data disclosure requests, manage decarbonization planning, and weave sustainability into…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 8 | 12 contacts → | ||||
Partial evidence “HIRE Tech & Climate Professionals FASTER.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 9 | 10 contacts → | ||||
Indirect evidence “Alithi’s team of expert strategists, policy leaders, sourcing specialists, education reformers, community builders, data scientists, and impact experts have spent decades honing…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 10 | 9 contacts → | ||||
Indirect evidence “The world needs cities and their service organizations to realize their innate capacity to build a carbon zero, sustainable future, through decisions made in the design, delivery…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 11 | 7 contacts → | ||||
Partial evidence “True Wind Collaborative is a consulting firm that designs and implements comprehensive strategic planning, stakeholder engagement, and communications programs in service of our…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 12 | 6 contacts → | ||||
Partial evidence “Snaplinc Consulting provides corporate sustainability strategy across a range of industries with a focus on environmental and social reporting metrics, verification and…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 13 | 6 contacts → | ||||
Indirect evidence “Your biggest strategic risk isn’t disruption.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 14 | 4 contacts → | ||||
Indirect evidence “The new generation of corporate ESG leaders may have the most demanding remit yet: You've been tasked with stepping up rapidly in the midst of multiple global disruptions to…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 15 | 4 contacts → | ||||
Indirect evidence “We are a team of experienced electrical engineers and consultants, who provide strategic planning and advocacy for our clients around the globe.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 16 | 2 contacts → | ||||
Indirect evidence “We are pleased to announce that Paladino and Company is now part of and operating as Buro Happold.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 17 | 2 contacts → | ||||
Partial evidence “Full Circle Environmental, Inc, a private environmental consulting firm, has been providing creative and effective approaches to resource conservation on behalf of business and…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 18 | 2 contacts → | ||||
Partial evidence “Tandem Impact is a sustainability strategy consulting firm.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 19 | 2 contacts → | ||||
Indirect evidence “We are The Nguyen Solutions.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 20 | 2 contacts → | ||||
Partial evidence “Urban Systems Design LLC (USD) is an award-winning, woman-owned consulting firm established in 2009.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 21 | 1 contacts → | ||||
Strong evidence “Leaders facing urgent challenges of climate action worry their efforts are not effective or enough.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 22 | 1 contacts → | ||||
Indirect evidence “No matter your expertise and impact goals, Pact Three can bring you through the process of learning, planning, and building.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 23 | 1 contacts → | ||||
Partial evidence “Rhyme Consulting helps mission-driven organizations turn complex ideas into clear, compelling stories and bring them to the audiences that matter most.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 24 | 1 contacts → | ||||
Strong evidence “A boutique consulting firm providing strategic advice, professional guidance, and actionable solutions to companies and individuals” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 25 | 1 contacts → | ||||
Partial evidence “Public Interest Management Group is a social enterprise that delivers strategic consulting services to mission-driven organizations that build healthy communities and protect the…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
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 action 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 action consulting firms.
- Partial evidence
- Its own public description names part of climate action 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 action 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 64 climate action consulting firms based in Seattle, United States
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 272 reachable decision-makers.
Free signup · no credit card
Climate action consulting firms based in Seattle, United States at a glance
As of Sep 21, 2026Companies by employee count
Email recency for this list is measured across the whole United States list rather than for Seattle, so it is reported there. Company counts and contact totals on this page are exact for Seattle, over 64 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 action 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 Seattle, United States whose own description of what they do matches “climate action 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 action 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 action consulting firms, and records with no verified work email. Companies headquartered outside Seattle 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, 272 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 action consulting firms by metro in the United States
- Climate action consulting firms in New York152
- Climate action consulting firms in Washington119
- Climate action consulting firms in Houston72
- Climate action consulting firms in Chicago70
- Climate action consulting firms in San Francisco66
- Climate action consulting firms in Los Angeles65
- Climate action consulting firms in Seattle64
- Climate action consulting firms in Portland45
- Climate action consulting firms in Atlanta42
- Climate action consulting firms in Miami42
- Climate action consulting firms in Denver40
- Climate action consulting firms in Austin35
- Climate action consulting firms in Boston31
- Climate action consulting firms in New York City31
- Climate action consulting firms in Philadelphia31
- Climate action consulting firms in San Diego27
- Climate action consulting firms in Boulder26
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 action 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 action consulting firms are there based in Seattle, United States?
RevenueBase identified 64 climate action consulting firms headquartered in Seattle, 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?
Cascadia Consulting Group, headquartered in Seattle, tops this list with the largest team on record.
Which city has the most climate action consulting firms?
New York leads with 152 headquartered companies, followed by Washington (119) and Houston (72).
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 272 verified decision-maker contacts tracked across these 64 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.
Ready to reach these companies? Verified emails and direct dials for all 64 climate action consulting firms based in Seattle, United States. Start with a free account, no credit card.
Download this list →Related lists
Climate action consulting firms by geography
- Climate action consulting firms based in Adelaide, Australia
- Climate action consulting firms based in Brisbane, Australia
- Climate action consulting firms based in Melbourne, Australia
- Climate action consulting firms based in Perth, Australia
- Climate action consulting firms based in Sydney, Australia
- Climate action consulting firms based in Belo Horizonte, Brazil
- Climate action consulting firms based in Campinas, Brazil
- Climate action consulting firms based in Curitiba, Brazil
- Climate action consulting firms based in Porto Alegre, Brazil
- Climate action consulting firms based in Rio De Janeiro, Brazil
- Climate action consulting firms based in Sao Paulo, Brazil
- Climate action consulting firms based in Calgary, Canada
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.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Climate action consulting firms based in Adelaide, Australia
- Climate action consulting firms based in Brisbane, Australia
- Climate action consulting firms based in Melbourne, Australia
- Climate action consulting firms based in Perth, Australia
- Climate action consulting firms based in Sydney, Australia
- Climate action consulting firms based in Belo Horizonte, Brazil