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Organization	Location	Revenue	Expenses	Assets	Program	Fundr. cost	Employees	Type
The Energy Foundation To achieve greenhouse gas emissions neutrality, world-class air quality, and green growth. 94-3126848 · FY2024	San Francisco, CA	$109.2M	$82.9M	$141.6M	92%	2%	5	501(c)(3)
Open Door Health Services INC To improve the quality of life of others. 35-2018494 · FY2024	Muncie, IN	$25.2M	$26.1M	$18.8M	76%	0%	237	501(c)(3)
Communities for a Better Environment To promote clean air, clean water, and the development of toxin-free COMMUNITIES. 94-2998086 · FY2024	Huntington Pk, CA	$8.1M	$7.9M	$9.3M	69%	7%	69	501(c)(3)
Open Buffalo INC Open Buffalo is a civic initiative, an unprecedented collaboration among a diverse group of partners, to make… 47-5317696 · FY2024	Buffalo, NY	$3.4M	$1.9M	$2.3M	75%	5%	8	501(c)(3)
Open Supply Hub INC To make SUPPLY chain data OPEN, accessible and trusted for the public benefit. Os HUB stewards data… 84-5010884 · FY2024	Hudson, NY	$3.3M	$2.9M	$4.0M	83%	2%	14	501(c)(3)
Open Skies Healthcare INC Providing behavioral health services to children, adults, and families in the community. 46-3192208 · FY2023	Phoenix, AZ	$3.1M	$3.3M	$1.4M	69%	0%	163	501(c)(3)
Building Transparency Our core mission is to provide the open access data and tools necessary to enable broad and swift action… 84-2727715 · FY2024	Seattle, WA	$3.0M	$3.3M	$7.4K	82%	0%	5	501(c)(3)
Open Source Technology Improvement Fund INC Charity for scientific research 47-3897395 · FY2025	Chicago, IL	$2.7M	$2.4M	$419.8K	75%	0%	—	501(c)(3)
Coalition for Clean Air To protect public health, improve air quality and prevent climate change. 23-7120567 · FY2023	Los Angeles, CA	$2.1M	$2.1M	$1.5M	78%	14%	13	501(c)(3)
The Open Link INC Multi-service agency providing programs & services that help, educate & empower, promote socialization &… 23-2003150 · FY2024	Pennsburg, PA	$1.8M	$1.7M	$2.5M	80%	8%	18	501(c)(3)
National Association of Clean Air Agencies To assist state and local AIR pollution control officials in improving their effectiveness as managers of AIR… 42-1708016 · FY2024	Washington, DC	$1.5M	$1.4M	$1.5M	98%	0%	7	501(c)(3)
Center for Rural Enterprise and Environmental Justice Reduce health and economic disparities and improve access to clean air, water, and soil in marginalized RURAL… 83-3405078 · FY2024	Huntsville, AL	$1.5M	$1.4M	$3.7M	79%	9%	4	501(c)(3)
Open Source Imaging Consortium INC Catalyze the discovery of widely usable diagnostic criteria by defining digital IMAGING biomarkers for… 83-2517243 · FY2024	Saugatuck, MI	$1.2M	$2.1M	$2.1M	69%	0%	—	501(c)(3)
Open Communities To eradicate housing discrimination and unjust practices that perpetuate segregation and inequity, and to… 36-2934709 · FY2023	Evanston, IL	$1.1M	$1.3M	$1.2M	79%	10%	14	501(c)(3)
Missoula Aids Fund INC Open Aid Alliance is a public health organization focused on helping people overcome stigma as they seek… 36-3652244 · FY2024	Missoula, MT	$1.1M	$1.2M	$118.8K	98%	1%	16	501(c)(3)
The Nelac Institute The mission of The NELAC Institute is to foster the generation of environmental data of known and documented… 81-0554715 · FY2023	Weatherford, TX	$1.0M	$907.1K	$14.4K	67%	0%	—	501(c)(3)
Open Source Project for a Network Develop and promote, in cooperation with other nonprofit public benefit corporations and government programs… 05-0514540 · FY2024	Saunderstown, RI	$986.0K	$1.1M	$1.0M	81%	0%	6	501(c)(3)
Frontier Community Coalition To build partnerships to support healthy communities 02-0705460 · FY2023	Lovelock, NV	$877.9K	$847.0K	$184.7K	94%	0%	8	501(c)(3)
Coalition for Environment Equity and Resilience To raise awareness of the connections between pollution, place and the public's health. 99-0386288 · FY2024	Houston, TX	$807.8K	$139.5K	$842.3K	80%	0%	—	501(c)(3)
Clear the Air Foundation Campaign for clean air through research and scholarship & education of the general public. 26-2499405 · FY2024	Denver, CO	$513.9K	$399.4K	$1.4M	41%	0%	—	501(c)(3)
Washington Coalition for Open Government Advocates for the people's right to access GOVERNMENT information. 73-1645374 · FY2024	Redmond, WA	$425.7K	$442.0K	$142.6K	91%	0%	—	501(c)(3)
Center for Open Data Enterprise INC Maximize the value of OPEN and shared DATA for the public good. 47-2871408 · FY2024	Washington, DC	$408.5K	$752.1K	$20.6K	72%	0%	6	501(c)(3)
Open Institute International INC An african non-profit organisation based in kenya but working in various parts of africa. We work in… 37-1907881 · FY2024	Washington, DC	$340.8K	$362.4K	$26.6K	100%	0%	—	501(c)(3)
Clean Air Coalition of Western New York INC The CLEAN AIR COALITION builds power by developing grassroots leaders who organize their communities to run… 27-0746038 · FY2024	Buffalo, NY	$338.7K	$689.3K	$237.3K	80%	4%	8	501(c)(3)
Open Environmental Data INC The mission of OPEN ENVIRONMENTAL DATA, INC. (oedp) is to reimagine the way we share and use ENVIRONMENTAL… 86-2759780 · FY2024	Dover, DE	$325.7K	$820.4K	$281.2K	90%	0%	3	501(c)(3)
Open Design Collective INC Support the social and spatial needs of underrepresented communities 82-5457203 · FY2024	Oklahoma City, OK	$256.8K	$252.0K	$139.9K	90%	0%	1	501(c)(3)
Freshair Collective To collect accurate data, foster meaningful community engagement, and drive action to improve indoor and… 93-3024294 · FY2025	Milwaukee, WI	$249.2K	$155.0K	$94.2K	15%	0%	2	501(c)(3)
Climate Access INC Climate Access builds the support needed to advance bold action by developing effective communication and… 82-0677662 · FY2023	Scotts Valley, CA	$213.0K	$347.7K	$207.9K	72%	12%	2	501(c)(3)
Openoceans Global To build a gis-based web infrastructure designed to bring together ocen data, to connect the ocean… 26-2476179 · FY2024	San Diego, CA	$211.6K	$14.6K	$207.7K	93%	1%	—	501(c)(3)
Open Access Connections Facilitating communication services to encourage self-determination and stronger community connections for… 41-1821890 · FY2024	St Paul, MN	$204.9K	$210.7K	$26.6K	92%	0%	5	501(c)(3)
Healthy Climate Communities Education on climate change and place-based science for school aged students and community project to plant a… 81-4031776 · FY2024	Kailua, HI	$190.6K	—	$120.8K	—	—	5	501(c)(3)
Open Door Resource Center INC To provide aid to the poor and underprivileged 27-0824197 · FY2024	Upper Sandsky, OH	$183.5K	$173.4K	$260.2K	99%	0%	4	501(c)(3)
Open Access US INC The OPEN ACCESS fellowship is a program funded by some of the community development industrys top companies… 88-3938185 · FY2025	Newark, NJ	$167.6K	$204.2K	$80.9K	86%	6%	—	501(c)(3)
Spotlight Air Environmental 87-1507661 · FY2024	Urbana, IL	$150.0K	—	$172.0K	—	—	—	501(c)(3)
Global Community Outreach 74-3086948 · FY2024	Harrisonville, MO	$104.1K	—	$213.2K	—	—	—	501(c)(3)
Pacific Northwest International Section Air Pollution Control Asso 93-6042083 · FY2024	Bellevue, WA	$92.0K	—	$250.1K	—	—	—	501(c)(3)
Community Air Mobility Initiative 84-2590652 · FY2019	Bainbridge Is, WA	$90.8K	—	$0	—	—	—	501(c)(3)
Open Source Standards Organization INC 99-1896334 · FY2024	Phoenix, AZ	$90.0K	—	$90.0K	—	—	—	501(c)(3)
Climate Equity Foundation 87-3865074 · FY2025	Washington, DC	$79.5K	—	$1	—	—	—	501(c)(3)

2,046,138

nonprofits

212,946

funders

12,515,252

grants

22,549,931

directors

214,365

service providers

549,896,012

financial lines

Public data from IRS Form 990 e-file & Business Master File. A 990 shows reported financial activity, not measured program outcomes. Assets are from the IRS BMF and may lag the latest filing; fundraising cost is fundraising expenses as a share of total expenses. · philanthropy.org