Company lists · Data refreshed September 2026
Top 25 Sustainability and climate change consulting firms based in Portland, United States
RevenueBase identified 43 sustainability and climate change consulting firms headquartered in Portland, United States as of September 2026 and tracks 474 professional contacts across them, including 321 with verified work emails. New York is the largest hub.
This list covers sustainability and climate change consulting firms headquartered in Portland, 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 sustainability and climate change consulting firms based in Portland, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 288 contacts → | ||||
Indirect evidence “At Cascade Energy, we believe in better.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 2 | 61 contacts → | ||||
Partial evidence “Recognized for advanced subject matter expertise, wide-ranging technical resources, creative problem-solving, and excellence in professional practice, Brightworks Sustainability…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 3 | 20 contacts → | ||||
Partial evidence “Cascadia Partners are a multi-disciplinary team with decades of experience in planning, design, development finance, sustainability, project management, and community engagement.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 4 | 19 contacts → | ||||
Indirect evidence “Samara Group LLC was founded to enhance environmental projects centered around rigorous science, inclusive partnerships, and effective communications.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 5 | 8 contacts → | ||||
Partial evidence “Everyone is too aware of the dangers of ignoring sustainability, but are you aware of the range of advantages in a proper sustainability strategy?” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 6 | 6 contacts → | ||||
Strong evidence “Creative Renewable Solutions is a clean energy consulting firm that helps businesses, utilities, and clean energy developers achieve their unique sustainability and performance…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 7 | 6 contacts → | ||||
Partial evidence “At Gordian Knot Strategies, we are expert climate finance consultants.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 8 | 6 contacts → | ||||
Strong evidence “Siler Climate Consulting works with clients to imagine and facilitate climate plans, projects, and programs that realize the transformative potential of climate action while…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 9 | 5 contacts → | ||||
Indirect evidence “BRIBURN is committed to creating innovative, energy efficient, and environmentally sound solutions, for residential, commercial, institutional, and civic projects, that artfully…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 10 | 5 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 11 | 4 contacts → | ||||
Partial evidence “EHNS Partners is a small dedicated team specializing in environmental, health, and safety consulting and engineering.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 12 | 4 contacts → | ||||
Strong evidence “Project Pivot is a women-owned, sustainability consulting firm in Portland, Oregon.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 13 | 3 contacts → | ||||
Strong evidence “CleanFuture is a consulting firm providing business and technical expertise in supply chain, sustainability, the combination of sustainability + supply chain, and a specialized…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 14 | 2 contacts → | ||||
Partial evidence “OUR MISSION We believe that economic success requires a stable climate and healthy ecosystems to enable robust markets, access to materials, transportation, energy, food, water…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 15 | 2 contacts → | ||||
Strong evidence “Spring Forward LLC is a woman-owned sustainability consulting firm based out of Portland, Oregon.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 16 | 2 contacts → | ||||
Indirect evidence “Brazen- adj:marked by shameless or disrespectful boldness // “a /brazen/ disregard for the rules.” You have big, bold ideas.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 17 | 1 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 18 | 1 contacts → | ||||
Indirect evidence “I am focused on applying my 40+ year architectural experience to help decarbonize the built environment through three areas of service- Strategic Facilitation - Policy and…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 19 | 1 contacts → | ||||
Indirect evidence “Summer Bunker is a Portland, Oregon-based brand and strategic marketing consultancy founded by Sarah Costello and powered by a community of world-class strategists, designers…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 20 | 1 contacts → | ||||
Indirect evidence “Uplevel Energy provides targeted and specialized expertise in the energy and decarbonization sector.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 21 | 1 contacts → | ||||
Partial evidence “Commitment There are roads to making progress on sustainability.and then there are shortcuts.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 22 | 1 contacts → | ||||
Partial evidence “ClimbSmart Strategies specializes in guiding organizations through the complexities of change to drive purpose-forward and sustainable transformations.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 23 | 1 contacts → | ||||
Indirect evidence “Our world is complex.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 24 | 1 contacts → | ||||
Indirect evidence “There is a major gap in how we currently design buildings.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 25 | 1 contacts → | ||||
Partial evidence “Solutions-Oriented Consultancy Providing Environment, Energy, and Government Consulting.” 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: sustainability and climate change 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 sustainability and climate change consulting firms.
- Partial evidence
- Its own public description names part of sustainability and climate change consulting firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name sustainability and climate change 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 43 sustainability and climate change consulting firms based in Portland, United States
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Sustainability and climate change consulting firms based in Portland, 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 Portland, so it is reported there. Company counts and contact totals on this page are exact for Portland, over 43 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 sustainability and climate change 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 Portland, United States whose own description of what they do matches “sustainability and climate change 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 sustainability and climate change 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 sustainability and climate change consulting firms, and records with no verified work email. Companies headquartered outside Portland 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, 321 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.
Sustainability and climate change consulting firms by metro in the United States
- Sustainability and climate change consulting firms in New York173
- Sustainability and climate change consulting firms in Houston79
- Sustainability and climate change consulting firms in Washington77
- Sustainability and climate change consulting firms in Chicago72
- Sustainability and climate change consulting firms in Los Angeles67
- Sustainability and climate change consulting firms in San Francisco63
- Sustainability and climate change consulting firms in Seattle61
- Sustainability and climate change consulting firms in Atlanta44
- Sustainability and climate change consulting firms in Portland43
- Sustainability and climate change consulting firms in Denver42
- Sustainability and climate change consulting firms in Miami38
- Sustainability and climate change consulting firms in San Diego32
- Sustainability and climate change consulting firms in Austin31
- Sustainability and climate change consulting firms in Boston31
- Sustainability and climate change consulting firms in Philadelphia28
- Sustainability and climate change consulting firms in New York City25
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 sustainability and climate change 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 sustainability and climate change consulting firms are there based in Portland, United States?
RevenueBase identified 43 sustainability and climate change consulting firms headquartered in Portland, 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?
Cascade Energy, headquartered in Portland, tops this list with the largest team on record.
Which city has the most sustainability and climate change consulting firms?
New York leads with 173 headquartered companies, followed by Houston (79) and Washington (77).
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 321 verified decision-maker contacts tracked across these 43 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.
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