Company lists · Data refreshed September 2026

Top 25 Habitat restoration organizations based in the United States

Name: Habitat restoration organizations based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 854 companies tracked

RevenueBase identified 854 habitat restoration organizations headquartered in the United States as of September 2026 and tracks 9,147 professional contacts across them, including 4,216 with verified work emails. Portland is the largest hub.

This list covers habitat restoration organizations headquartered in the 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 20, 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 20, 2026 86% judged on-target in blind review

854Companies

9,147Contacts tracked

4,216Verified emails

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The 25 largest habitat restoration organizations based in the United States

Ranked by team size

Top 25 of 854 habitat restoration organizations based in the United States, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to habitat restoration organizations: 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	Resource Environmental Solutions LLC	Indirect evidence	Bellaire, TX, United StatesHQ checked Sep 20, 2026	501-1,000	677 contacts →
	Indirect evidence “As the nation’s largest nature-based solutions company, RES (Resource Environmental Solutions) is restoring a resilient earth for a modern world, project by project.” Source: RevenueBase Database · checked Sep 20, 2026
2	Conservation Corps Minnesota & Iowa	Indirect evidence	St. Paul, MN, United StatesHQ checked Sep 20, 2026	201-500	207 contacts →
	Indirect evidence “At Conservation Corps Minnesota & Iowa, youth and young adults grow as environmental stewards and leaders while giving back to the community through meaningful service.” Source: RevenueBase Database · checked Sep 20, 2026
3	Defenders Of Wildlife	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	51-200	202 contacts →
	Indirect evidence “Defenders of Wildlife is dedicated to the protection of all native animals and plants in their natural communities.” Source: RevenueBase Database · checked Sep 20, 2026
4	National Forest Foundation	Partial evidence	Missoula, MT, United StatesHQ checked Sep 20, 2026	51-200	171 contacts →
	Partial evidence “The NFF works with communities and organizations to conserve and enhance the watersheds, wildlife habitat and wild places across our 193-million-acre National Forest System.” Source: RevenueBase Database · checked Sep 20, 2026
5	American Forests	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	51-200	136 contacts →
	Indirect evidence “Founded in 1875, American Forests is the oldest national nonprofit conservation organization in the U.S.” Source: RevenueBase Database · checked Sep 20, 2026
6	Eden People Planet	Partial evidence	Murrieta, CA, United StatesHQ checked Sep 20, 2026	11-50	131 contacts →
	Partial evidence “Eden: People+Planet is a global 501(c)(3) nonprofit organization focused on landscape restoration and conservation through community partnerships.” Source: RevenueBase Database · checked Sep 20, 2026
7	Stillwater Sciences	Indirect evidence	Berkeley, CA, United StatesHQ checked Sep 20, 2026	51-200	115 contacts →
	Indirect evidence “Stillwater Sciences is committed to creating a better world through science.” Source: RevenueBase Database · checked Sep 20, 2026
8	Environmental Quality Resources, LLC	Partial evidence	Millersville, MD, United StatesHQ checked Sep 20, 2026	201-500	101 contacts →
	Partial evidence “Our mission is to be the keystone species in the restoration of the Chesapeake Bay.” Source: RevenueBase Database · checked Sep 20, 2026
9	Biohabitats	Indirect evidence	Baltimore, MD, United StatesHQ checked Sep 20, 2026	51-200	93 contacts →
	Indirect evidence “Mission: Restore The Earth And Inspire Ecological Stewardship.” Source: RevenueBase Database · checked Sep 20, 2026
10	Urban Ecology Center	Indirect evidence	Milwaukee, WI, United StatesHQ checked Sep 20, 2026	51-200	93 contacts →
	Indirect evidence “Our vision is to inspire generations to build environmental curiosity, understanding, and respect.” Source: RevenueBase Database · checked Sep 20, 2026
11	Bridging The GAP	Indirect evidence	Kansas City, MO, United StatesHQ checked Sep 20, 2026	11-50	83 contacts →
	Indirect evidence “Bridging The Gap brings people together to protect and restore the web of life on Earth and foster inclusive, thriving communities through environmental education, innovation, and…” Source: RevenueBase Database · checked Sep 20, 2026
12	River Partners	Indirect evidence	Chico, CA, United StatesHQ checked Sep 20, 2026	51-200	81 contacts →
	Indirect evidence “River Partners brings life back to rivers.” Source: RevenueBase Database · checked Sep 20, 2026
13	California Trout	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 20, 2026	51-200	75 contacts →
	Indirect evidence “California Trout is a non-profit conservation organization that strives to solve complex resource issues while balancing the needs of wild fish and people through science-based…” Source: RevenueBase Database · checked Sep 20, 2026
14	MNL	Partial evidence	Otsego, MN, United StatesHQ checked Sep 20, 2026	51-200	74 contacts →
	Partial evidence “Founded in 1998, MNL is an ecological restoration company with professional services ranging from prairie and stream restoration to prescribed burning and conservation grazing.” Source: RevenueBase Database · checked Sep 20, 2026
15	H. T. Harvey & Associates	Indirect evidence	Los Gatos, CA, United StatesHQ checked Sep 20, 2026	51-200	69 contacts →
	Indirect evidence “Since 1970, the highly-trained ecologists and professionals at H.” Source: RevenueBase Database · checked Sep 20, 2026
16	Tampa BAY Watch	Partial evidence	Tierra Verde, FL, United StatesHQ checked Sep 20, 2026	51-200	68 contacts →
	Partial evidence “Tampa Bay Watch is a 501(c)(3) nonprofit organization dedicated to the protection and restoration of the Tampa Bay estuary through scientific and educational programs.” Source: RevenueBase Database · checked Sep 20, 2026
17	Summitwest Environmental, INC	Indirect evidence	Bend, OR, United StatesHQ checked Sep 20, 2026	51-200	65 contacts →
	Indirect evidence “SummitWest is an environmental consulting company that is home to a team of dynamic, solution-oriented thinkers.” Source: RevenueBase Database · checked Sep 20, 2026
18	Delaware Nature Society	Indirect evidence	Hockessin, DE, United StatesHQ checked Sep 20, 2026	51-200	64 contacts →
	Indirect evidence “Founded in 1964, Delaware Nature Society works to improve the environment through conservation, advocacy, and education.” Source: RevenueBase Database · checked Sep 20, 2026
19	Scenic Hudson, INC	Indirect evidence	Poughkeepsie, NY, United StatesHQ checked Sep 20, 2026	51-200	60 contacts →
	Indirect evidence “Scenic Hudson is a community-oriented organization that works with policymakers, municipalities, engaged citizens, and developers to ensure that the natural beauty of the Hudson…” Source: RevenueBase Database · checked Sep 20, 2026
20	Sequoia Ecological Consulting	Indirect evidence	Walnut Creek, CA, United StatesHQ checked Sep 20, 2026	11-50	59 contacts →
	Indirect evidence “Founded in 2011, Sequoia is a California-based, woman-owned, small, and disadvantaged business (WBE \| SBE \| DBE) that provides environmental consulting services to public agencies…” Source: RevenueBase Database · checked Sep 20, 2026
21	Bird Alliance Of Oregon	Indirect evidence	Portland, OR, United StatesHQ checked Sep 20, 2026	51-200	59 contacts →
	Indirect evidence “Oregon wouldn’t be Oregon without Bird Alliance.” Source: RevenueBase Database · checked Sep 20, 2026
22	Schlitz Audubon Nature Center	Indirect evidence	Milwaukee, WI, United StatesHQ checked Sep 20, 2026	51-200	57 contacts →
	Indirect evidence “Once a farm for the Schlitz Brewery draft horses, Schlitz Audubon Nature Center is Milwaukee’s comprehensive nature center.” Source: RevenueBase Database · checked Sep 20, 2026
23	Rainforest Trust	Partial evidence	Warrenton, VA, United StatesHQ checked Sep 20, 2026	11-50	53 contacts →
	Partial evidence “For more than 35 years, Rainforest Trust has not wavered from its mission of preventing deforestation, preserving critical habitat and safeguarding endangered species.” Source: RevenueBase Database · checked Sep 20, 2026
24	Western Reserve Land Conservancy	Indirect evidence	Moreland Hills, OH, United StatesHQ checked Sep 20, 2026	11-50	52 contacts →
	Indirect evidence “Join the Western Reserve Land Conservancy Group for current updates and discussions!” Source: RevenueBase Database · checked Sep 20, 2026
25	The Watershed Institute	Indirect evidence	Pennington, NJ, United StatesHQ checked Sep 20, 2026	11-50	51 contacts →
	Indirect evidence “Keeping water clean, safe and healthy is the heart of our mission.” Source: RevenueBase Database · checked Sep 20, 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: habitat restoration organizations. 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 habitat restoration organizations.
Partial evidence: Its own public description names part of habitat restoration organizations, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name habitat restoration organizations. 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 854 habitat restoration organizations based in the United States

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Habitat restoration organizations based in the United States at a glance

As of Sep 20, 2026

46.1%Verified-email coverage

10.7Average contacts per company

1-10Median size (employees)

2.0%Largest-city concentration · Portland

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

560

11-50

229

51-200

201-500

501-1,000

1,001-5,000

10001+

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 854 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 habitat restoration organizations, 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 the United States whose own description of what they do matches “habitat restoration organizations”. 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 habitat restoration organizations), 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 habitat restoration organizations, and records with no verified work email. Companies headquartered outside United States 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, 4,216 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 20, 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.

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 habitat restoration organizations, 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 habitat restoration organizations are there based in the United States?

RevenueBase identified 854 habitat restoration organizations headquartered in the 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?

Resource Environmental Solutions LLC, headquartered in Bellaire, tops this list with the largest team on record.

Which city has the most habitat restoration organizations?

Portland leads with 17 headquartered companies, followed by San Francisco (9) and Denver (8).

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 4,216 verified decision-maker contacts tracked across these 854 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 20, 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.