| # | Company | Employees |
|---|---|---|
| 1 |
Alpha Phi International Fraternityalphaphi.org
A sisterhood of women founded in 1872 at Syracuse University, promoting excellence through collegiate and alumnae chapters in the US and Canada |
4,173 |
| 2 |
National MS Societynationalmssociety.org
The company's vision is a world free of MS, with a mission to cure MS and empower those affected by the disease |
1,765 |
| 3 |
Mercy Housingmercyhousing.org
The company provides affordable housing and supportive programs to improve economic status, transform neighborhoods, and stabilize lives for low-income families, seniors, and special needs individuals |
1,401 |
| 4 |
iDE (International Development Enterprises)ideglobal.org
Global development organization co-creating solutions with various stakeholders to alleviate poverty through market-based approaches in Agriculture and WASH across 11 countries |
704 |
| 5 |
Engineers Without Borders USAewb-usa.org
A nonprofit organization supporting community-driven engineering projects to provide sustainable solutions for basic human needs worldwide |
692 |
| 6 |
Colorado Coalition for the Homelesscoloradocoalition.org
The organization works to prevent homelessness, provide housing and services, and address the root causes of homelessness in Colorado |
577 |
| 7 |
CDI Head Startcdiheadstart.org
CDI HS provides interim management services for Head Start/Early Head Start programs to ensure continuity of services during transitions or program closures nationwide |
546 |
| 8 |
SASEsaseconnect.org
Promotes Asian Americans in STEM through leadership development, competitions, and community programs, serving a diverse community of professionals, students, and organizations |
476 |
| 9 |
Denver Rescue Missiondenverrescuemission.org
This company provides hope and support to individuals in need, offering a starting point for positive change and growth |
356 |
| 10 |
The Phoenixthephoenix.org
A nonprofit organization supporting individuals in recovery through physical activities like CrossFit, climbing, and yoga, fostering confidence, self-respect, and community |
342 |
| 11 |
Goodwill Industries of Denvergoodwilldenver.org
Career development resources, life-skills training, and support for veterans, seniors, youth, and those with disabilities or barriers to employment in Colorado |
312 |
| 12 |
Mi Casa Resource Centermicasaresourcecenter.org
Dedicated to creating pathways to opportunity through workforce, business, and youth development programs for low-income individuals in Metro Denver |
310 |
| 13 |
YMCA of Metro Denverdenverymca.org
A community-focused organization in Denver dedicated to improving health and well-being through programs, partnerships, and developing future changemakers |
233 |
| 14 |
Girl Scouts of Coloradogirlscoutsofcolorado.org
Organization empowering girls in grades K-12 through leadership development, skill-building activities, community service, and volunteer opportunities Offers virtual troops and programs |
186 |
| 15 |
Jewish Family Service of Coloradojewishfamilyservice.org
A nonprofit organization providing a variety of services including food security, housing stability, mental health counseling, and employment support to anyone in need |
179 |
| 16 |
CareerWisecareerwiseusa.org
CareerWise develops youth apprenticeship systems to create talent pipelines, address skilled worker shortages, and improve education access through workforce development solutions |
178 |
| 17 |
Rocky Mountain SER (Service Employment Redevelopment)rmser.org
A non-profit organization in Colorado providing education, job training, and support services to help residents lead productive and dignified lives |
164 |
| 18 |
Build Changebuildchange.org
The company specializes in mobilizing resources to transform global systems for regulating, financing, constructing, and enhancing residential housing |
158 |
| 19 |
Community Resource Centercrcamerica.org
A mission-driven nonprofit in Colorado providing training and support to strengthen nonprofits and community groups, addressing various community issues statewide |
156 |
| 20 |
Colorado Health Networkcoloradohealthnetwork.org
Nonprofit organization in Colorado providing comprehensive support services to individuals affected by HIV and other health conditions through prevention, care, advocacy, and testing |
153 |
| 21 |
Mile High United Wayunitedwaydenver.org
Collaborative nonprofit organization in Colorado addressing critical human services issues, focusing on education, child development, and economic opportunity for all |
149 |
| 22 |
Catholic Charities of Denverccdenver.org
A nonprofit organization in Colorado offering a variety of services to tens of thousands of individuals each year, including disaster relief and counseling |
148 |
| 23 |
National Western Stock Shownationalwestern.com
A premier livestock, rodeo, and horse show organization providing education, scholarships, and entertainment while celebrating western heritage and strengthening American agriculture |
127 |
| 24 |
Firefly Autismfireflyautism.org
Empowering individuals on the autism spectrum through personalized ABA therapy, promoting dignity, respect, and success for clients of all ages |
66 |
| 25 |
Metro Denver Dental Societymddsdentist.com
Dedicated to advancing the dental profession, promoting oral health awareness, and providing educational opportunities for members since 1897 |
10 |
| 26 |
West Community Economic Development Corporationbucuwest.com
The BuCu West Development Association supports entrepreneurs, small businesses, cultural organizations, and residents in creating an authentic, energetic, and colorful destination |
6 |
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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 Nov 2, 2026.
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