Company lists · Data refreshed September 2026

Top 25 Ecological restoration programs based in the United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 382 companies tracked

RevenueBase identified 382 ecological restoration programs headquartered in the United States as of September 2026 and tracks 4,297 professional contacts across them, including 2,076 with verified work emails. Portland is the largest hub.

This list covers ecological restoration programs 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 19, 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 19, 2026 86% judged on-target in blind review

382Companies

4,297Contacts tracked

2,076Verified emails

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The 25 largest ecological restoration programs based in the United States

Ranked by team size

Top 25 of 382 ecological restoration programs based in the United States, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to ecological restoration programs: 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 19, 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 19, 2026
2	American Forests	Indirect evidence	Washington, DC, United StatesHQ checked Sep 19, 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 19, 2026
3	Eden People Planet	Partial evidence	Murrieta, CA, United StatesHQ checked Sep 19, 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 19, 2026
4	Terraformation	Indirect evidence	Waimea, United StatesHQ checked Sep 19, 2026	51-200	101 contacts →
	Indirect evidence “Restoring the world's native forests to address climate change, renew biodiverse ecosystems, and support thriving communities.” Source: RevenueBase Database · checked Sep 19, 2026
5	Environmental Quality Resources, LLC	Partial evidence	Millersville, MD, United StatesHQ checked Sep 19, 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 19, 2026
6	Biohabitats	Partial evidence	Baltimore, MD, United StatesHQ checked Sep 19, 2026	51-200	93 contacts →
	Partial evidence “Mission: Restore The Earth And Inspire Ecological Stewardship.” Source: RevenueBase Database · checked Sep 19, 2026
7	Bridging The GAP	Indirect evidence	Kansas City, MO, United StatesHQ checked Sep 19, 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 19, 2026
8	River Partners	Indirect evidence	Chico, CA, United StatesHQ checked Sep 19, 2026	51-200	81 contacts →
	Indirect evidence “River Partners brings life back to rivers.” Source: RevenueBase Database · checked Sep 19, 2026
9	Prairie Restorations, INC	Indirect evidence	Princeton, MN, United StatesHQ checked Sep 19, 2026	51-200	50 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
10	Natural Systems Design	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 19, 2026	51-200	49 contacts →
	Indirect evidence “Natural Systems Design (NSD) is a team of scientists, engineers, and planners who are also farmers, fishermen and impassioned river people who have organized our lives to have a…” Source: RevenueBase Database · checked Sep 19, 2026
11	Naturion	Strong evidence	Columbia, IL, United StatesHQ checked Sep 19, 2026	51-200	49 contacts →
	Strong evidence “Naturion is a market leader in the wetland and stream mitigation industry providing high-quality ecological restoration for degraded ecosystems.” Source: RevenueBase Database · checked Sep 19, 2026
12	RANA	Strong evidence	Carmel, CA, United StatesHQ checked Sep 19, 2026	11-50	48 contacts →
	Strong evidence “RANA is an award-winning ecological design company specializing in landscape architecture, environmental planning, habitat restoration, native plant propagation, and sustainable…” Source: RevenueBase Database · checked Sep 19, 2026
13	Imperative	Partial evidence	Singapore, TX, United StatesHQ checked Sep 19, 2026	51-200	47 contacts →
	Partial evidence “Imperative is a large-scale ecosystem restoration company.” Source: RevenueBase Database · checked Sep 19, 2026
14	Mast Reforestation	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 19, 2026	11-50	47 contacts →
	Indirect evidence “As wildfires destroy more forestland every year, Mast is scaling post-wildfire reforestation in Western North America.” Source: RevenueBase Database · checked Sep 19, 2026
15	Ecotone, INC	Partial evidence	Forest Hill, MD, United StatesHQ checked Sep 19, 2026	51-200	46 contacts →
	Partial evidence “Ecotone, Inc, a Maryland corporation founded in 1998, is one of few companies that provides full delivery ecosystem restoration services including, restoration design, consulting…” Source: RevenueBase Database · checked Sep 19, 2026
16	Institute For Applied Ecology	Indirect evidence	Corvallis, OR, United StatesHQ checked Sep 19, 2026	51-200	44 contacts →
	Indirect evidence “The Institute for Applied Ecology is a non-profit 501(c)(3) organization founded in with a mission to conserve native species and habitats.” Source: RevenueBase Database · checked Sep 19, 2026
17	Landstudies	Strong evidence	Lititz, PA, United StatesHQ checked Sep 19, 2026	11-50	44 contacts →
	Strong evidence “LandStudies, a Davey Tree Company, is a design-build ecological restoration firm founded in 1989.” Source: RevenueBase Database · checked Sep 19, 2026
18	Ecosystem Planning And Restoration	Partial evidence	Tomball, TX, United StatesHQ checked Sep 19, 2026	11-50	42 contacts →
	Partial evidence “EPR was created in 2012 to be a premier environmental planning and ecosystem restoration company.” Source: RevenueBase Database · checked Sep 19, 2026
19	Soil-Tech, INC	Partial evidence	Las Vegas, NV, United StatesHQ checked Sep 19, 2026	11-50	41 contacts →
	Partial evidence “The premier environmental restoration contractor\| For over 30 years we have forged the way in sustainable, eco-friendly contracting services for utility-scale projects across the…” Source: RevenueBase Database · checked Sep 19, 2026
20	Friends Of Trees	Indirect evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	11-50	40 contacts →
	Indirect evidence “Friends of Trees inspires people to improve the world around them through a simple solution: Planting trees.” Source: RevenueBase Database · checked Sep 19, 2026
21	Tallgrass Restoration	Strong evidence	Schaumburg, IL, United StatesHQ checked Sep 19, 2026	51-200	39 contacts →
	Strong evidence “Tallgrass Restoration works in partnership with public, private, and corporate clients committed to restoring their landscapes, to create ecologically sustainable natural…” Source: RevenueBase Database · checked Sep 19, 2026
22	Environmental Nature Center	Indirect evidence	Newport Beach, CA, United StatesHQ checked Sep 19, 2026	11-50	38 contacts →
	Indirect evidence “Please join us in connecting people to nature by donating to the Environmental Nature Center this giving season.” Source: RevenueBase Database · checked Sep 19, 2026
23	Great River Greening	Indirect evidence	St Paul, MN, United StatesHQ checked Sep 19, 2026	11-50	36 contacts →
	Indirect evidence “Great River Greening inspires, engages and leads local communities in conserving and caring for the land and water that enrich our lives.” Source: RevenueBase Database · checked Sep 19, 2026
24	Greenvest, LLC	Indirect evidence	Bowie, MD, United StatesHQ checked Sep 19, 2026	11-50	35 contacts →
	Indirect evidence “GreenVest, LLC (GV) is a certified small business and an established leader in the ecosystem services industry with over 27 years of experience in developing resilient…” Source: RevenueBase Database · checked Sep 19, 2026
25	Wilkinson Ecological Design, INC	Partial evidence	Orleans, MA, United StatesHQ checked Sep 19, 2026	11-50	31 contacts →
	Partial evidence “Wilkinson Ecological Design’s mission is to protect and restore the integrity and biodiversity of the unique natural ecosystems of Cape Cod, the Islands, and Eastern Massachusetts.” Source: RevenueBase Database · checked Sep 19, 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: ecological restoration programs. 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 ecological restoration programs.
Partial evidence: Its own public description names part of ecological restoration programs, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name ecological restoration programs. 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 382 ecological restoration programs based in the United States

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Ecological restoration programs based in the United States at a glance

As of Sep 19, 2026

48.3%Verified-email coverage

11.2Average contacts per company

1-10Median size (employees)

2.4%Largest-city concentration · Portland

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

240

11-50

106

51-200

201-500

501-1,000

1,001-5,000

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 382 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 ecological restoration programs, 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 “ecological restoration programs”. 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 ecological restoration programs), 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 ecological restoration programs, 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, 2,076 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 19, 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 ecological restoration programs, 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 ecological restoration programs are there based in the United States?

RevenueBase identified 382 ecological restoration programs 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 ecological restoration programs?

Portland leads with 9 headquartered companies, followed by Atlanta (5) and Columbia (5).

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 2,076 verified decision-maker contacts tracked across these 382 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 19, 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.