Company lists · Data refreshed September 2026

Top 25 Environmental organizations based in Oakland, United States

Name: Environmental organizations based in Oakland, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 48 companies tracked

RevenueBase identified 48 company matches for environmental organizations associated with Oakland, United States as of September 2026 and tracks 1,689 professional contacts across them, including 725 with verified work emails. Across the United States, Washington is the largest hub for this category (209 companies); Oakland has 48.

This list covers company matches for environmental organizations associated with Oakland, United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 19, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 19, 2026 How this list was built

48Companies

1,689Contacts tracked

725Verified emails

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The 25 largest environmental organizations based in Oakland, United States

Ranked by team size

Top 25 of 48 company matches for environmental organizations based in Oakland, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 19, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Sierra Club	Exact match	Oakland, CA, United StatesHQ recorded Sep 19, 2026	501-1,000	1,069 contacts →
	Exact match “At the Sierra Club, we believe in the power of togetherness.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
2	Trellis Group	Exact match	Oakland, CA, United StatesHQ recorded Sep 19, 2026	51-200	67 contacts →
	Exact match “Trellis Group, formerly GreenBiz Group, empowers professional communities to confront the climate crisis while building a regenerative, prosperous and just economy that supports…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
3	California Environmental Voters	Exact match	Oakland, CA, United StatesHQ recorded Sep 19, 2026	11-50	58 contacts →
	Exact match “California Environmental Voters (EnviroVoters) exists to build the political power to solve the climate crisis, advance justice, and create a roadmap for global action.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
4	Circlepoint	Exact match	Oakland, CA, United StatesHQ recorded Sep 19, 2026	11-50	47 contacts →
	Exact match “At Circlepoint, we are committed to helping our clients solve the challenges of today.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
5	Asian Pacific Environmental Network	Exact match	Oakland, CA, United StatesHQ recorded Sep 19, 2026	11-50	37 contacts →
	Exact match “All people have a right to a clean and healthy environment in which their communities can live, work, learn, play and thrive.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
6	watttime.org	Exact match	Oakland, United StatesHQ recorded Sep 19, 2026	11-50	35 contacts →
	Exact match “WattTime is an environmental tech nonprofit that empowers all people, companies, policymakers, and countries to slash emissions and choose cleaner energy.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
7	Center For Environmental Health	Exact match	Oakland, CA, United StatesHQ recorded Sep 19, 2026	11-50	34 contacts →
	Exact match “We envision a world where everyone lives, works, learns and plays in a healthy environment; we protect people from toxic chemicals by working with communities, businesses, and the…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
8	Rose Foundation For Communities And The Environment	Exact match	Oakland, CA, United StatesHQ recorded Sep 19, 2026	11-50	30 contacts →
	Exact match “The Rose Foundation envisions a future where nature is protected, people’s rights are ensured, and environmental justice is advanced, and where these three values are deeply…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
9	International Rivers	Exact match	Oakland, CA, United StatesHQ recorded Sep 19, 2026	11-50	26 contacts →
	Exact match “International Rivers' mission is to protect rivers and defend the rights of communities that depend on them.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
10	California Environmental Justice Alliance	Exact match	Oakland, CA, United StatesHQ recorded Sep 19, 2026	11-50	21 contacts →
	Exact match “The California Environmental Justice Alliance is a statewide, community-led alliance that works to achieve environmental justice by advancing policy solutions.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
11	Olofson Environmental, INC	Exact match	Oakland, CA, United StatesHQ recorded Sep 19, 2026	11-50	21 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
12	SAN Francisco Baykeeper	Exact match	Oakland, United StatesHQ recorded Sep 19, 2026	11-50	21 contacts →
	Exact match “San Francisco Baykeeper has defended the Bay since 1989.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
13	Sierra Club Foundation	Exact match	Oakland, CA, United StatesHQ recorded Sep 19, 2026	11-50	18 contacts →
	Exact match “The Sierra Club Foundation promotes climate solutions, conservation, and movement building through a powerful combination of strategic philanthropy and grassroots advocacy.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
14	Climate Action California	Exact match	Oakland, CA, United StatesHQ recorded Sep 19, 2026	1-10	17 contacts →
	Exact match “Climate Action California has grown out of 350 Silicon Valley’s Legislation/Policy team’s work in recent years to include individuals and groups from around our state.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
15	BAY Area Green Tours, 501 C 3	Exact match	Oakland, CA, United StatesHQ recorded Sep 19, 2026	11-50	13 contacts →
	Exact match “Bay Area Green Tours provides educational tours and events that demonstrate the sustainable economy in action, inspire support of local green businesses, and empower people to…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
16	Restore Native Plants	Exact match	Oakland, NJ, United StatesHQ recorded Sep 19, 2026	1-10	12 contacts →
	Exact match “Restore Native Plants is an innovative team focused on restoring the region’s native plant and animal species – many of which have become threatened and endangered.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17	Calwild	Exact match	Oakland, CA, United StatesHQ recorded Sep 19, 2026	1-10	9 contacts →
	Exact match “CalWild protects and restores the state’s wildest natural landscapes and watersheds on public lands.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
18	Lozeau Drury LLP	Exact match	Oakland, CA, United StatesHQ recorded Sep 19, 2026	11-50	8 contacts →
	Exact match “We are a boutique environmental law firm representing non-profit environmental and recreational groups, labor organizations, neighborhood associations, and Indian tribes in their…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
19	Gigantic Idea Studio	Exact match	Oakland, CA, United StatesHQ recorded Sep 19, 2026	1-10	6 contacts →
	Exact match “Gigantic Idea Studio, Inc.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20	California Interfaith Power & Light	Exact match	Oakland, CA, United StatesHQ recorded Sep 19, 2026	1-10	5 contacts →
	Exact match “Welcome to California Interfaith Power & Light, the originator of the Interfaith Power & Light campaign that began in and now has 40 state affiliates.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
21	WEAD	Exact match	Oakland, CA, United StatesHQ recorded Sep 19, 2026	1-10	5 contacts →
	Exact match “MISSION STATEMENT Focusing on women’s unique perspectives we collaborate internationally to further the field and understanding of ecological and social justice art.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
22	Stop The Money Pipeline	Exact match	Oakland, CA, United StatesHQ recorded Sep 19, 2026	1-10	4 contacts →
	Exact match “We're going after the root cause of the #climatecrisis: Wall Street’s financing of fossil fuels.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
23	Greenbiz Group	Exact match	Oakland, CA, United StatesHQ recorded Sep 19, 2026	51-200	4 contacts →
	Exact match “GreenBiz Group is a media and events company that views climate change and other global environmental challenges as existential threats to business and society, as well as…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
24	Critical Ecology LAB	Exact match	Oakland, CA, United StatesHQ recorded Sep 19, 2026	1-10	4 contacts →
	Exact match “For centuries, the exploitation of land and labor–from cotton plantations to oil fields–has laid the groundwork for today’s climate crisis.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
25	Keep Oakland Beautiful	Exact match	Oakland, CA, United StatesHQ recorded Sep 19, 2026	1-10	4 contacts →
	Exact match “Keep Oakland Beautiful (KOB) is a non-profit organization and an affiliate of Keep America Beautiful.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “environmental organizations”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 48 environmental organizations based in Oakland, United States

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Environmental organizations based in Oakland, United States at a glance

As of Sep 19, 2026

42.9%Verified-email coverage

35.2Average contacts per company

1-10Median size (employees)

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Email recency for this list is measured across the whole United States list rather than for Oakland, so it is reported there. Company counts and contact totals on this page are exact for Oakland, over 48 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with Oakland, United States whose business descriptions match “environmental organizations” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 725 professional contacts with verified work emails across the full matched dataset. 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.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Environmental organizations by metro in the United States

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “environmental organizations”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many environmental organizations are there based in Oakland, United States?

RevenueBase identified 48 company matches for environmental organizations associated with Oakland, United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Sierra Club tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United States has the most environmental organizations?

Washington leads the United States with 209 company records, followed by New York (204) and Los Angeles (133). Oakland has 48.

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 725 professional contacts with verified work emails tracked across these 48 companies; direct dials are available where recorded.

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 SmartSearch, 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.