These San Francisco-based professional services firms are predominantly large organizations specializing in IT services, legal practice, and financial services. Companies such as Globant, with over 28,000 employees, focus on digital innovation, while Sama specializes in data annotation for AI models. Orrick, Herrington & Sutcliffe LLP is a global law firm, and TPG is an alternative asset management firm.
A notable pattern among these firms is the strong presence of legal practices and IT consulting. Several companies, including Gensler and frog, also have a significant footprint in design and architecture, indicating a diverse professional landscape beyond traditional services.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Globantglobant.com
A digitally native company specializing in helping organizations innovate and unleash potential, with a focus on diversity, inclusion, and cybersecurity |
28,419 | |||
| 2 |
Genslergensler.com
Global architecture, design, and planning firm with a network of 6,000+ professionals creating positive change through impactful design across various sectors worldwide |
8,363 | |||
| 3 |
URS Corporation, An AECOM Companyurs.com
A global professional and technical services firm offering design, construction, and operations of infrastructure assets worldwide for public and private clients |
8,221 | |||
| 4 | 4,350 | ||||
| 5 |
Andersenandersen.com
Global association of independent member firms with 14,000 professionals offering comprehensive solutions in accounting, law, and tax services worldwide With 2,000 personnel in the US |
3,560 | |||
| 6 | 3,321 | ||||
| 7 |
Gordon Rees Scully Mansukhani, LLPgrsm.com
A nationwide law firm providing comprehensive litigation and business transaction services to public and private companies, with 1,200 lawyers across all states |
3,257 | |||
| 8 |
Orrick, Herrington & Sutcliffe LLPorrick.com
Global law firm specializing in technology, energy, infrastructure, and finance sectors, providing pragmatic advice on transactions, litigation, and compliance worldwide. |
3,193 | |||
| 9 |
BairesDevbairesdev.com
Expert partner in building high-quality software solutions with top tech talent Delivering scalable technology solutions for startups to Fortune Global 500 brands Unlocking business possibilities |
3,174 | |||
| 10 |
Morrison Foerstermofo.com
Providing tailored legal strategies and trusted partnerships to solve complex challenges for financial, technology, life sciences, and Fortune 100 clients. |
2,990 | |||
| 11 |
Littlerlittler.com
Largest global employment and labor law practice representing management, providing comprehensive legal solutions across multiple continents and countries worldwide. |
2,984 | |||
| 12 | 2,975 | ||||
| 13 | 2,669 | ||||
| 14 | 2,103 | ||||
| 15 | 1,864 | ||||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 16 |
Wizelinewizeline.ai
A global technology services provider that builds digital products & platforms, modernizes core technologies, enhances data-driven capabilities, & improves user experience |
1,800 | |||
| 17 | 1,443 | ||||
| 18 |
Self-employedquesben.com
Freelance communications & strategy consultant specializing in promoting alternative living solutions like sustainability, minimalism, and modern nomadism for purpose-driven leaders and entrepreneurs |
1,392 | |||
| 19 |
Cornerstone Researchcornerstone.com
Provides economic and financial analysis for litigation, utilizing academic experts and innovative research methods to solve complex legal and business problems. |
1,359 | |||
| 20 |
IA Interior Architectsinteriorarchitects.com
An innovative global architecture firm specializing in interior design, providing strategic planning, architecture, and design services for corporations and institutions worldwide |
1,321 | |||
| 21 |
WestEdwested.org
A national nonprofit agency promoting equity and excellence in education through research, development, and services, offering professional growth and benefits |
1,237 | |||
| 22 |
Facebook Ads Expertdroidowl.com
This company provides expert Facebook and Instagram ad strategies for various industries, offering services such as optimization, campaign launches, and consultation |
1,173 | |||
| 23 |
informalinformal.cc
Platform connecting top freelancers with businesses to help build, brand, and grow physical product businesses of all sizes |
1,162 | |||
| 24 |
Robosoft Technologiesrobosoftin.com
Robosoft Technologies is a leading digital transformation partner, specializing in digital product strategy, design, development, testing, cybersecurity, and data science for various industries globally |
1,085 | |||
| 25 |
Standish Management, LLCstandishmanagement.com
Specialized fund administration services for private equity funds, offering consulting and technology solutions to accelerate fund launches and scale operations efficiently |
927 | |||
| 26 |
Novogradacnovoco.com
Accounting and consulting services specializing in real estate, affordable housing, community development, renewable energy, and valuation for national clients. |
829 | |||
| 27 |
Newfrontnewfront.com
modern insurance brokerage with industry-leading expertise, transformative technology and client-centric, scalable solutions, helping clients mitigate risk, elevate employee experience, and forge profitable growth. |
800 | |||
| 28 |
Springboxprophet.com
Prophet is a consulting firm that helps leaders achieve purposeful, transformative, and sustainable growth through strategic solutions and creative capabilities |
790 | |||
| 29 | 783 | ||||
| 30 | 761 | ||||
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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 11, 2026.
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The same list elsewhere in United States
- Professional services firms in the United States 7,078
- Professional services firms in New York State 955
- Professional services firms in California 880
- Professional services firms in Texas 629
- Professional services firms in Florida 375
- Professional services firms in Virginia 344
- Professional services firms in Illinois 339
- Professional services firms in Massachusetts 249
- Professional services firms in New Jersey 249
- Professional services firms in Georgia 246
- Professional services firms in Pennsylvania 245
- Professional services firms in Ohio 195
- Professional services firms in Maryland 176
- Professional services firms in Michigan 172
- Professional services firms in Washington State 163
- Professional services firms in North Carolina 142
- Professional services firms in Alabama 135
- Professional services firms in Minnesota 125
- Professional services firms in New York 735
- Professional services firms in Chicago 196
- Professional services firms in Houston 156
- Professional services firms in Atlanta 143
- Professional services firms in Washington 109
- Professional services firms in Los Angeles 108