| # | Company | Employees |
|---|---|---|
| 1 | 19,290 | |
| 2 |
Gallupgallup.com
Provides analytics and advice to help leaders solve problems using over 85 years of experience and global insights on attitudes and behaviors |
2,320 |
| 3 | 2,131 | |
| 4 |
American College of Cardiologyacc.org
The organization leads in cardiovascular care, education, research, and policy formation to improve heart health for all |
1,896 |
| 5 |
InfoCeptsinfocepts.ai
Infocepts specializes in using data, AI, and user-friendly analytics to help clients overcome challenges and make better business decisions |
1,428 |
| 6 |
Arcadiaarcadia.com
Arcadia is an energy data company democratizing access to global energy data to enable companies to act on their environmental impact and create climate tech solutions |
1,363 |
| 7 |
Mapboxmapbox.com
Leading real-time location platform providing tools, applications, data, SDKs, and APIs for navigation of people, packages, and vehicles. |
984 |
| 8 |
ENGIE Impactengieimpact.com
Sustainability solutions provider for corporations, cities, and governments worldwide, offering strategic and technical support to tackle complex sustainability challenges Leader in zero-carbon transition |
934 |
| 9 |
National Association of Independent Schoolsnais.org
This organization supports over 1,700 independent K-12 schools in the US and abroad, helping them fulfill their unique missions and serve students effectively |
595 |
| 10 |
ISSIissidata.org
A Washington, DC-based nonprofit offering data management, targeting, and coalition-building services to advocacy groups, charities, and political organizations since 2007 |
587 |
| 11 | 530 | |
| 12 | 467 | |
| 13 |
Bloomberg Governmentabout.bgov.com
The company provides news, analytics, and data-driven decision tools to government affairs professionals, aiding in government action influence |
433 |
| 14 |
US Geological Surveyusgs.gov
Provider of authoritative scientific information and research on Earth, natural resources, environmental issues, and natural hazards at the federal level |
393 |
| 15 |
Sayarisayari.com
A global corporate transparency and risk identification company providing commercial risk intelligence software utilized by financial institutions, Fortune 100 companies, and government agencies worldwide |
372 |
| 16 |
FiscalNotefiscalnote.com
A leader in policy and global intelligence, providing critical insights and tools to empower organizations to stay ahead of political and business risk |
367 |
| 17 |
Advisory Boardadvisory.com
Providing healthcare industry leaders with insights, strategies, and tools to work smarter and drive change through research and collaboration |
361 |
| 18 |
Verified Market Research庐verifiedmarketresearch.com
Global analytical research consultancy empowering Fortune 500 corporations with actionable intelligence and strategic insights for market leadership and revenue impact |
341 |
| 19 |
Morning Consultmorningconsult.com
Provides real-time, AI-driven consumer insights and decision intelligence through a vast global survey engine spanning over 100 markets. |
323 |
| 20 |
Windwardwindward.ai
Provides AI-powered maritime intelligence platform automating operations, mitigating risks, and enabling organizations to navigate complex global trade confidently and efficiently. |
261 |
| 21 |
Babel Streetbabelstreet.com
This company offers advanced data analytics and intelligence platforms to aid government and commercial brands in making informed decisions and managing risks effectively |
261 |
| 22 |
TDItdinternational.com
Strategic advisory and risk intelligence firm offering actionable intelligence to manage risk for multinational organizations, financial services, law firms, and individuals |
243 |
| 23 |
Hanley Wood (now Zonda)zondahome.com
Company rebranded from Hanley Wood to Zonda, focusing on providing updated information and resources through zondahome.com. |
202 |
| 24 |
CoreViewcoreview.com
CoreView is a leading Microsoft 365 management platform, providing delegated administration, automated governance, and optimization tools for IT teams worldwide |
199 |
| 25 |
Enquire AIenquire.ai
Enquire AI helps enterprises access real-time global expertise through an AI-powered platform, connecting users with an exclusive expert network for knowledge sharing and rewards |
196 |
| 26 |
Aristotlearistotle.com
Political technology pioneer providing campaign software, voter data, PAC services, and customer support for political organizations and individuals involved in the political process |
186 |
| 27 |
ChurnZerochurnzero.com
It provides tools and support for subscription businesses to enhance customer success, reduce churn, and drive revenue growth effectively. |
147 |
| 28 | 82 | |
| 29 |
Pixalatepixalate.com
Leading fraud protection, privacy, and compliance analytics platform for Connected TV and Mobile Advertising, offering coordinated solutions to detect and eliminate ad fraud |
68 |
| 30 | 49 | |
| 31 |
DataTecnicadatatecnica.com
Driving healthcare innovation through diverse expertise in data science, technology, biology, and medicine, with a focus on open science and collaborative problem-solving |
42 |
| 32 |
Deciledecile.com
Customer data and analytics platform helping brands grow profitably by simplifying data insights to build loyalty, optimize strategy, and drive brand value |
16 |
Turn this list into pipeline
Tamtam finds the decision-makers at every company on a list like this one, with verified emails, phone numbers and the buying signals that tell you when to reach out.
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.
More company lists in Washington
- The largest companies in Washington 1,167
- Non-profit Organizations companies in Washington 145
- Education providers in Washington 109
- Government Administration companies in Washington 100
- Consulting firms in Washington 70
- Public sector organisations in Washington 65
- IT Services and IT Consulting companies in Washington 56
- Media companies and publishers in Washington 52
- IT services companies in Washington 44
- Critical infrastructure operators in Washington 42
- Financial Services companies in Washington 41
- Law firms in Washington 41
- Financial services firms in Washington 40
- Business Consulting and Services companies in Washington 39
- SaaS companies in Washington 39
- Research institutes in Washington 38
- Venture capital and private equity firms in Washington 37
- Healthcare providers in Washington 36
- Higher Education companies in Washington 36
- Law Practice companies in Washington 36
- Hospitals and Health Care companies in Washington 32
- AI companies in Washington 29
- International Affairs companies in Washington 29
- Aerospace and defence companies in Washington 28
The same list elsewhere in United States
- Data and analytics companies in the United States 1,692
- Data and analytics companies in California 380
- Data and analytics companies in New York State 324
- Data and analytics companies in Texas 113
- Data and analytics companies in Massachusetts 107
- Data and analytics companies in New Jersey 69
- Data and analytics companies in Illinois 61
- Data and analytics companies in Virginia 58
- Data and analytics companies in Florida 55
- Data and analytics companies in Alabama 47
- Data and analytics companies in Pennsylvania 47
- Data and analytics companies in Georgia 46
- Data and analytics companies in Washington State 45
- Data and analytics companies in Colorado 33
- Data and analytics companies in North Carolina 29
- Data and analytics companies in New York 303
- Data and analytics companies in San Francisco 115
- Data and analytics companies in Boston 59
- Data and analytics companies in Chicago 50
- Data and analytics companies in Atlanta 29
- Data and analytics companies in Austin 29
- Data and analytics companies in Houston 25
- Data and analytics companies in Santa Clara 25