| # | Company | Employees |
|---|---|---|
| 1 |
UNICEFunicef.org
The organization works globally to support the most vulnerable children, saving lives, defending rights, and promoting overall well-being for all |
48,886 |
| 2 |
TED Conferencested.com
Discovering and promoting powerful ideas globally to inspire change, shift perspectives, and create positive impact across communities and disciplines. |
16,033 |
| 3 |
International Rescue Committeerescue.org
Delivering lifesaving care and assistance to refugees and displaced people in over 50 countries and 28 US cities to restore safety, dignity, and hope |
13,458 |
| 4 |
SEO (Sponsors for Educational Opportunity)seo-usa.org
The company provides academic and career support programs for underserved youth, helping them access college, internships, and jobs in various sectors |
4,709 |
| 5 |
Crisis Text Linecrisistextline.org
A nonprofit organization providing free 24/7 text-based mental health support and crisis intervention in English and Spanish, with trained volunteers |
4,689 |
| 6 | 3,617 | |
| 7 |
ASME (The American Society of Mechanical Engineers)asme.org
Leading international organization enabling engineers to collaborate, share knowledge, and develop skills to address real-world challenges and promote engineering's vital role in society |
3,274 |
| 8 |
AHRC New York Cityahrcnyc.org
Advocating for equity and social justice, supporting individuals with intellectual and developmental disabilities to lead full and equitable lives in NYC |
2,369 |
| 9 |
ICAP at Columbia Universityicap.columbia.edu
A global leader in HIV and health systems strengthening, providing technical assistance and support to governments and organizations in nearly 50 countries |
2,304 |
| 10 |
Action Against Hunger USAactionagainsthunger.org
A global organization fighting hunger in 55 countries for nearly 45 years, saving lives, enabling self-sufficiency, and pushing for long-term change |
1,994 |
| 11 |
YMCA of Greater New Yorkymcanyc.org
A nonprofit organization in New York City empowering youth, improving health, and strengthening community through diverse programs and services |
1,985 |
| 12 |
Children's Aidchildrensaidnyc.org
They provide comprehensive support to children and families in poverty in NYC, helping kids succeed in school and life |
1,904 |
| 13 |
Good Shepherd Servicesgoodshepherds.org
Support children, youth, and families facing challenges by building strengths, providing effective services, and advocating for community improvement. |
1,854 |
| 14 |
Endeavorendeavor.org
Global community supporting high-impact entrepreneurs in underserved markets through inspiration, investment, and a platform for growth and giving back. |
1,852 |
| 15 |
AIChE - American Institute of Chemical Engineersaiche.org
Leading organization for chemical engineering professionals with global network, resources, career tools, industry events, and exclusive benefits for over 60,000 members worldwide |
1,831 |
| 16 |
ACM, Association for Computing Machinerylinktr.ee
Unites computing educators, researchers, professionals globally. Promotes computer research, innovation through publications, conferences. Fosters networking, raises awareness of technical, educational, social computing issues. |
1,791 |
| 17 |
JOB VACANCIES TODAYjobvacanciestoday.org
A non-profit organization developing a free HR inclusion platform connecting recruiters and jobseekers |
1,767 |
| 18 |
Human Rights Watchhrw.org
A leading independent organization defending and protecting human rights by advocating, investigating, and holding oppressors accountable for their crimes globally |
1,705 |
| 19 |
AFS Intercultural Programsafs.org
Promote global citizenship through intercultural learning programs, empowering individuals to become active, responsible members of the global community. |
1,611 |
| 20 |
Harlem Children's Zonehcz.org
The organization provides comprehensive programs to break the cycle of poverty by creating opportunities for children and families to thrive |
1,555 |
| 21 | 1,480 | |
| 22 |
ICLiclinc.org
This company provides comprehensive housing, healthcare, and recovery services to help New Yorkers with behavioral health challenges live healthy and fulfilling lives |
1,467 |
| 23 |
Environmental Defense Fundedf.org
Focus on climate stabilization and community health through innovative solutions, collaboration with diverse groups, and impactful environmental initiatives. |
1,439 |
| 24 |
COOPcoopcareers.org
Support first-generation college graduates overcoming underemployment through digital skills training, peer connections, and career development across multiple U.S. cities. |
1,412 |
| 25 |
Girls Inc.girlsinc.org
Empowering girls to be strong, smart, and bold through mentoring, safe environments, and research-based programming to help them succeed |
1,368 |
| 26 |
Helen Keller Intlhelenkellerintl.org
Global organization delivering life-changing healthcare to vulnerable families by preventing and treating vision loss, malnutrition, and neglected diseases |
1,309 |
| 27 | 1,263 | |
| 28 |
JDC (The Joint)jdc.org
Global humanitarian organization rescuing and aiding vulnerable Jews, developing solutions to social challenges, fostering Jewish future, and leading crisis response |
1,243 |
| 29 |
Rainforest Alliancerainforest-alliance.org
Global non-profit promoting responsible business practices, supporting farmers and forest communities, protecting biodiversity, and addressing climate change through sustainable sourcing. |
1,194 |
| 30 |
UNICEF USAunicefusa.org
Raises funds and advocates for children's well-being globally, providing critical nutrition, health, education, and humanitarian aid with high efficiency. |
1,165 |
| 31 |
Services for the UnderServedsus.org
Empowering individuals in New York City and Long Island facing homelessness, disability, behavioral health challenges, and more through dedicated services and support |
1,157 |
| 32 |
Pro Mujerpromujer.org
A social enterprise advancing gender equality in Latin America through financial, digital inclusion, health, and training services for women, promoting Investing with a Gender Focus |
1,147 |
| 33 |
National Audubon Societyaudubon.org
protects birds and habitats across the Americas through science, advocacy, education, and community-based conservation efforts. |
1,057 |
| 34 |
Local Initiatives Support Corporation (LISC)lisc.org
This company works with residents and partners to create resilient and inclusive communities, focusing on building alliances, developing leadership, investing in infrastructure, and driving policy changes |
1,035 |
| 35 |
GiveDirectlygivedirectly.org
The company enables direct cash transfers to the extreme poor using technology, providing efficient and transparent assistance to transform international development |
993 |
| 36 |
Hadassahhadassah.org
A volunteer organization supporting medical care and research in Jerusalem, inspiring commitment to Israel partnership, personal growth, education, advocacy, and Jewish continuity |
992 |
| 37 |
HELP USAhelpusa.org
The company works to provide housing and services for at-risk populations, including homeless individuals, veterans, families, and survivors of domestic violence |
986 |
| 38 |
Institute of International Educationiie.org
Non-profit organization creating international education programs, conducting research, and providing transformative opportunities for students and scholars worldwide. |
971 |
| 39 |
The Fedcap Groupfedcapgroup.org
A nonprofit organization offering education, vocational training, behavioral health services, and workforce development to help individuals achieve long-term self-sufficiency |
942 |
| 40 |
The New York Academy of Sciencesnyas.org
A prestigious scientific organization with a 200-year history, bringing together thinkers and innovators to drive innovative solutions through research, education, and policy |
938 |
| 41 |
Open Society Foundationsopensocietyfoundations.org
Provide grants and support to promote tolerance, transparency, human rights, and fairness in political, legal, and economic systems worldwide. |
862 |
| 42 |
JCCAjccany.org
The company provides comprehensive care and support to children, young people, and families in the New York metropolitan area, aiming to repair the world child by child |
862 |
| 43 |
Safe Horizonsafehorizon.org
Supporting victims of crime and abuse by providing crisis intervention, advocacy, and resources to help them move from crisis to confidence |
824 |
| 44 |
QSAC (Quality Services for the Autism Community)qsac.com
A nonprofit supporting individuals with autism and their families in achieving independence through personalized services including education, vocational training, and support |
823 |
| 45 |
ADAPT Community Networkadaptcommunitynetwork.org
A leading not-for-profit agency providing innovative programs and services to improve the quality of life for people with disabilities |
802 |
| 46 |
Project Renewalprojectrenewal.org
A nonprofit organization in NYC dedicated to ending homelessness by providing holistic services including healthcare, housing, and job support |
787 |
| 47 |
The Posse Foundationpossefoundation.org
An organization that identifies high school students with potential, placing them in diverse teams for full-tuition scholarships at partner colleges |
783 |
| 48 |
Anti-Defamation Leagueadl.org
A leading anti-hate organization founded in 1913, ADL fights all forms of hate, exposes extremism, provides anti-bias education, and combats hate online |
777 |
| 49 |
Police Athletic League, Inc.palnyc.org
A non-profit organization in NYC providing youth with academic, sports, arts, job training, and mentoring programs through the support of staff and NYPD officers |
772 |
| 50 |
National Kidney Foundationkidney.org
Revolutionizing kidney disease prevention, advancing patient care innovation, and addressing inequities in kidney care, dialysis, and transplantation Follow on Twitter, Facebook, and Instagram |
758 |
| 51 |
Center for Justice Innovationinnovatingjustice.org
A non-profit organization working to promote equity, safety, and prosperity by addressing challenges that lead individuals into the justice system through programs, research, and knowledge sharing globally |
735 |
| 52 |
Selfhelp Community Servicesselfhelp.net
A nonprofit organization providing housing, healthcare, and social services to seniors and at-risk populations, utilizing new methods and technologies |
720 |
| 53 |
Robin Hoodrobinhood.org
Organization in New York addresses poverty by funding impactful programs and schools, providing essential services to empower families in need |
715 |
| 54 |
32BJ SEIUseiu32bj.org
The company is a property service workers union representing over 175,000 workers in various industries, advocating for fair wages and working conditions |
711 |
| 55 |
American Kennel Clubakc.org
Registry maintenance, purebred dog promotion, canine health advocacy, dog owner rights protection, and responsible dog ownership encouragement. |
681 |
| 56 |
International Trademark Association (INTA)inta.org
Global association supporting brand owners and professionals in promoting trademarks and intellectual property to enhance consumer trust, economic growth, and innovation |
632 |
| 57 |
Vital Strategiesvitalstrategies.org
Partner with governments and communities worldwide to create equitable, effective public health systems supporting healthier lives in all environments. |
622 |
| 58 |
Crohn's & Colitis Foundationcrohnscolitisfoundation.org
A non-profit organization dedicated to research, patient support, and education for those living with inflammatory bowel disease (IBD) |
617 |
| 59 |
American Foundation for Suicide Preventionafsp.org
Dedicated to saving lives and bringing hope by promoting mental health awareness, conducting research, advocacy, and providing support for those affected by suicide |
616 |
| 60 |
Fountain Housefountainhouse.org
The organization supports Americans with serious mental illness by providing community care, housing, education, employment opportunities, and health and wellness programs |
574 |
| 61 |
Public Health Solutionshealthsolutions.org
A non-profit organization improving public health in NYC through services, research, and partnerships, with a focus on health equity |
567 |
| 62 |
Henry Street Settlementhenrystreet.org
A historic organization in Manhattan offering social services, arts, and healthcare programs, empowering over 50,000 New Yorkers annually to combat urban poverty |
567 |
| 63 |
Doctors Without Borders/Mรฉdecins Sans Frontiรจres - USAdoctorswithoutborders.org
Providing impartial medical care and humanitarian aid to people affected by conflict, epidemics, disasters, and healthcare exclusion worldwide. |
559 |
| 64 |
Covenant House Internationalcovenanthouse.org
Providing free 24/7 crisis care, housing, medical, mental health, educational, and vocational services to homeless youth and survivors. |
550 |
| 65 |
Breaking Ground (NYC Permanent Supportive Housing)breakingground.org
This organization provides housing and support services to individuals and families experiencing homelessness or at risk of homelessness in New York City |
543 |
| 66 |
The Rockefeller Foundationrockefellerfoundation.org
A global foundation dedicated to promoting human well-being through solving world challenges related to health, food, energy, and jobs |
537 |
| 67 |
Simons Foundationsimonsfoundation.org
Grant funding and support for research in mathematics, physical sciences, life sciences, autism, neuroscience, and computational science research. |
531 |
| 68 |
The Hunger Projectthp.org
Global movement empowering communities in Africa, South Asia, and Latin America to create sustainable solutions for ending hunger worldwide. |
523 |
| 69 |
Central Park Conservancycentralparknyc.org
A nonprofit dedicated to the care, maintenance, and restoration of Central Park through individual donations for the benefit of the community |
515 |
| 70 |
American Jewish Committee (AJC)ajc.org
A global Jewish advocacy organization advancing human rights, democratic values, and interfaith alliances through diplomacy, advocacy, coalition building, and communications |
513 |
| 71 |
Catholic Guardian Servicescatholicguardian.org
The company provides supportive interventions and services for underserved families and individuals, aiming to help, create hope, and preserve dignity |
513 |
| 72 |
Clinton Foundationclintonfoundation.org
The Foundation works to create economic opportunity, improve public health, and inspire civic engagement through cooperation and collaboration with partners |
509 |
| 73 |
New York Caresnewyorkcares.org
Help create a more equitable NYC through our services Sign up today to learn more |
508 |
| 74 |
Phippsphippsny.org
Creating safe, inclusive spaces for community members to access education, career, and economic opportunities, promoting success in school, work, and family life Join us today! |
507 |
| 75 |
Orthodox Unionlinktr.ee
The company positively impacts Jewish individuals worldwide through religious, youth, social action, educational, and community development services and programs |
505 |
| 76 |
Center for Urban Community Services | CUCScucs.org
The company helps homeless and low-income individuals and families by providing housing, health, and social services for holistic support and training |
499 |
| 77 |
Lutheran Social Services of New Yorklssny.org
A non-profit organization providing a range of services to individuals, families, and communities regardless of age, economic status, creed, or race |
490 |
| 78 |
Women In Need, Inc. (Win)winnyc.org
An organization providing shelter, services, and programs to NYC homeless families, aiming to break the cycle of homelessness and promote independence |
489 |
| 79 |
Glasswing Internationalglasswing.org
An innovative non-profit empowering youth and communities in dangerous areas through education, health, and resilience programs, impacting over 15 million lives since 2007 |
487 |
| 80 |
Bloomberg Philanthropiesbloomberg.org
Global philanthropic organization dedicated to advancing arts, education, environment, government innovation, and public health initiatives along with other charitable activities |
473 |
| 81 |
Dress for Success Worldwidedressforsuccess.org
An international organization empowering women with professional attire, support, and development tools to achieve economic independence in work and life |
468 |
| 82 |
The TOP Comoros: 100 Times LinkedIn Powers for Free | Global Charity | 102 Businessย Magazinesthetopperson.com
Global charity empowering individuals to become business influencers through a free Ambassador program, connecting them with decision makers for professional growth and success |
458 |
| 83 |
National Urban Leaguenul.org
A historic organization empowering African Americans for economic and social success through programs, advocacy, and research across the United States |
455 |
| 84 |
Orbis Internationalorbis.org
nonprofit organization building sustainable eye care systems worldwide, providing treatment, prevention, training, and education through multiple platforms |
454 |
| 85 |
America Needs Youamericaneedsyou.org
This organization supports ambitious, first-generation college students through mentorship and career development programs operating in four states |
451 |
| 86 |
AMIT Childrenamitchildren.org
An organization in Israel provides innovative, Jewish values-based education to over 40,000 children annually, aiming to level the playing field through education |
443 |
| 87 |
IEEE Communications Societycomsoc.org
Global community advancing communications and networking technologies through conferences, events, workshops, and educational opportunities in emerging areas like 5G and IoT |
436 |
| 88 |
VisionSpringvisionspring.org
VisionSpring is a social enterprise working to provide eyeglasses to those in emerging markets to improve their earning potential, learning abilities, safety, and well-being |
436 |
| 89 |
Catholic Charities of the Archdiocese of New Yorklinktr.ee
The company provides aid to those in need regardless of their religious background, offering assistance, support, and advocacy for a variety of human needs |
429 |
| 90 |
American Corporate Partners (ACP)acp-usa.org
A nonprofit organization helping US service members, Veterans, and Military Spouses find careers through free, yearlong mentorships with top business leaders |
425 |
| 91 |
Nestbuildanest.org
Empowering artisans and creative entrepreneurs worldwide through radical transparency and economic opportunities in the handcraft sector to advance gender equity and economic equality |
419 |
| 92 |
Volunteers of America-Greater New Yorkvoa-gny.org
A leading provider of supportive housing and social services in the Greater New York area, serving veterans, families, children, and older adults in need |
417 |
| 93 |
University Settlement Society of New Yorkuniversitysettlement.org
Social service organization in NYC with diverse programs impacting over 40,000 New Yorkers annually, focusing on mental health, education, arts, and adolescent development |
411 |
| 94 |
Ascendascendleadership.org
Global network empowering Asian and Pacific Islander professionals to reach full potential through partnerships with industry leaders for leadership development |
406 |
| 95 |
Iraq and Afghanistan Veterans of America (IAVA)iava.org
Advocates and supports veterans by amplifying their voices, driving solutions, providing resources, and personal support through experienced social workers |
405 |
| 96 |
Goddard Riversidegoddard.org
Leading human service organization in NYC providing food, shelter, education, and social activities Offers volunteer opportunities for individuals, groups, and corporate programs |
399 |
| 97 |
Smile Trainsmiletrain.org
Empowers local medical professionals with training, funding, and resources to provide free cleft surgery and comprehensive care to children globally. Advances a sustainable global health model. |
396 |
| 98 | 384 | |
| 99 |
The Explorers Clubexplorers.org
Advancing field research, scientific exploration, and preserving the instinct to explore by supporting 3,500 scientists and explorers globally on expeditions. |
382 |
| 100 |
Global Citizenglobalcitizen.org
An advocacy organization mobilizing Global Citizens to take action on issues affecting extreme poverty, leading to commitments by world leaders |
381 |
Turn this list into pipeline
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How this list is built
Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Oct 10, 2026.
More company lists in New York
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- Software Development companies in New York 532
- Investment Management companies in New York 371
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- Venture Capital and Private Equity Principals companies in New York 341
- Real Estate companies in New York 318
- IT Services and IT Consulting companies in New York 305
- Retail Apparel and Fashion companies in New York 267
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- Business Consulting and Services companies in New York 169
- Law Practice companies in New York 138
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- Entertainment Providers companies in New York 106
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- Retail companies in New York 102
- Staffing and Recruiting companies in New York 90
- Higher Education companies in New York 87
- Retail Luxury Goods and Jewelry companies in New York 73
- Publicly traded companies in New York 70
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The same list elsewhere in United States
- Non-profit Organizations companies in the United States 1,967
- Non-profit Organizations companies in Washington 143
- Non-profit Organizations companies in Chicago 65
- Non-profit Organizations companies in Los Angeles 41
- Non-profit Organizations companies in San Francisco 38
- Non-profit Organizations companies in Boston 36
- Non-profit Organizations companies in Indianapolis 30
- Non-profit Organizations companies in Atlanta 27