# List of professional services firms in San Francisco

Tamtam tracks 130 professional services firms headquartered in San Francisco. This list ranks the 30 largest by number of employees on LinkedIn, led by Globant, Gensler and URS Corporation, An AECOM Company. Their median headcount is 1,864. Half of them were founded in 1992 or later.

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.

🇺🇸 San Francisco · 30 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Globant](https://www.tamtam.ai/c/globant) (globant.com)<br>A digitally native company specializing in helping organizations innovate and unleash potential, with a focus on diversity, inclusion, and cybersecurity | IT Services and IT Consulting | 🇺🇸 San Francisco | 28,419 |  |
| 2 | [Gensler](https://www.tamtam.ai/c/gensler) (gensler.com)<br>Global architecture, design, and planning firm with a network of 6,000+ professionals creating positive change through impactful design across various sectors worldwide | Architecture and Planning | 🇺🇸 San Francisco | 8,363 | 1965 |
| 3 | [URS Corporation, An AECOM Company](https://www.tamtam.ai/c/urs-corporation-an-aecom-company) (urs.com)<br>A global professional and technical services firm offering design, construction, and operations of infrastructure assets worldwide for public and private clients | Civil Engineering | 🇺🇸 San Francisco | 8,221 |  |
| 4 | [Sama](https://www.tamtam.ai/c/sama) (sama.com)<br>A global leader in data annotation solutions for enterprise AI models, focusing on accuracy, scalability, and ethical practices to advance computer vision AI development | IT Services and IT Consulting | 🇺🇸 San Francisco | 4,350 | 2008 |
| 5 | [Andersen](https://www.tamtam.ai/c/andersen) (andersen.com)<br>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 | Financial Services | 🇺🇸 San Francisco | 3,560 |  |
| 6 | [TYLin](https://www.tamtam.ai/c/tylin) (tylin.com)<br>Design infrastructure solutions enhancing mobility, sustainability, resilience, and innovation to connect and elevate communities worldwide with advanced engineering approaches. | Civil Engineering | 🇺🇸 San Francisco | 3,321 |  |
| 7 | [Gordon Rees Scully Mansukhani, LLP](https://www.tamtam.ai/c/gordon-rees-scully-mansukhani-llp) (grsm.com)<br>A nationwide law firm providing comprehensive litigation and business transaction services to public and private companies, with 1,200 lawyers across all states | Law Practice | 🇺🇸 San Francisco | 3,257 | 1974 |
| 8 | [Orrick, Herrington & Sutcliffe LLP](https://www.tamtam.ai/c/orrick-herrington-and-sutcliffe-llp) (orrick.com)<br>Global law firm specializing in technology, energy, infrastructure, and finance sectors, providing pragmatic advice on transactions, litigation, and compliance worldwide. | Law Practice | 🇺🇸 San Francisco | 3,193 | 1863 |
| 9 | [BairesDev](https://www.tamtam.ai/c/bairesdev) (bairesdev.com)<br>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 | IT Services and IT Consulting | 🇺🇸 San Francisco | 3,174 | 2009 |
| 10 | [Morrison Foerster](https://www.tamtam.ai/c/morrison-foerster) (mofo.com)<br>Providing tailored legal strategies and trusted partnerships to solve complex challenges for financial, technology, life sciences, and Fortune 100 clients. | Law Practice | 🇺🇸 San Francisco | 2,990 | 1883 |
| 11 | [Littler](https://www.tamtam.ai/c/littler) (littler.com)<br>Largest global employment and labor law practice representing management, providing comprehensive legal solutions across multiple continents and countries worldwide. | Law Practice | 🇺🇸 San Francisco | 2,984 | 1942 |
| 12 | [TPG](https://www.tamtam.ai/c/tpg-san-francisco) (tpg.com)<br>Global alternative asset management firm focused on private equity, impact, credit, real estate, and market solutions through collaborative and innovative investment strategies. | Financial Services | 🇺🇸 San Francisco | 2,975 | 1992 |
| 13 | [Taller](https://www.tamtam.ai/c/taller-san-francisco) (taller.us)<br>The company uses AI to provide expertly-matched tech teams from Latin America, helping businesses accelerate growth, reduce hiring time, and improve retention | IT Services and IT Consulting | 🇺🇸 San Francisco | 2,669 | 2008 |
| 14 | [frog](https://www.tamtam.ai/c/frog) (frog.co)<br>Innovative global consultancy part of Capgemini Invent, crafting transformative human experiences through creativity, strategy, design, and data for business growth | Design Services | 🇺🇸 San Francisco | 2,103 | 1969 |
| 15 | [BPM LLP](https://www.tamtam.ai/c/bpm-llp) (bpm.com)<br>Top 35 US public accounting firm in various industries, recognized for fast growth Offers diverse, progressive solutions as certified B Corp | Business Consulting and Services | 🇺🇸 San Francisco | 1,864 | 1986 |
| 16 | [Wizeline](https://www.tamtam.ai/c/wizeline) (wizeline.ai)<br>A global technology services provider that builds digital products & platforms, modernizes core technologies, enhances data-driven capabilities, & improves user experience | IT Services and IT Consulting | 🇺🇸 San Francisco | 1,800 | 2014 |
| 17 | [IDEO](https://www.tamtam.ai/c/ideo) (ideo.com)<br>This company helps individuals and organizations design innovative products and services to create a more sustainable and equitable future | Design Services | 🇺🇸 San Francisco | 1,443 |  |
| 18 | [Self-employed](https://www.tamtam.ai/c/self-employed-san-francisco) (quesben.com)<br>Freelance communications & strategy consultant specializing in promoting alternative living solutions like sustainability, minimalism, and modern nomadism for purpose-driven leaders and entrepreneurs | Advertising Services | 🇺🇸 San Francisco | 1,392 | 2018 |
| 19 | [Cornerstone Research](https://www.tamtam.ai/c/cornerstone-research) (cornerstone.com)<br>Provides economic and financial analysis for litigation, utilizing academic experts and innovative research methods to solve complex legal and business problems. | Business Consulting and Services | 🇺🇸 San Francisco | 1,359 | 1989 |
| 20 | [IA Interior Architects](https://www.tamtam.ai/c/ia-interior-architects) (interiorarchitects.com)<br>An innovative global architecture firm specializing in interior design, providing strategic planning, architecture, and design services for corporations and institutions worldwide | Design Services | 🇺🇸 San Francisco | 1,321 | 1984 |
| 21 | [WestEd](https://www.tamtam.ai/c/wested) (wested.org)<br>A national nonprofit agency promoting equity and excellence in education through research, development, and services, offering professional growth and benefits | Research Services | 🇺🇸 San Francisco | 1,237 | 1966 |
| 22 | [Facebook Ads Expert](https://www.tamtam.ai/c/facebook-ads-expert) (droidowl.com)<br>This company provides expert Facebook and Instagram ad strategies for various industries, offering services such as optimization, campaign launches, and consultation | IT Services and IT Consulting | 🇺🇸 San Francisco | 1,173 | 2013 |
| 23 | [informal](https://www.tamtam.ai/c/informal) (informal.cc)<br>Platform connecting top freelancers with businesses to help build, brand, and grow physical product businesses of all sizes | Business Consulting and Services | 🇺🇸 San Francisco | 1,162 | 2019 |
| 24 | [Robosoft Technologies](https://www.tamtam.ai/c/robosoft-technologies) (robosoftin.com)<br>Robosoft Technologies is a leading digital transformation partner, specializing in digital product strategy, design, development, testing, cybersecurity, and data science for various industries globally | IT Services and IT Consulting | 🇺🇸 San Francisco | 1,085 | 1996 |
| 25 | [Standish Management, LLC](https://www.tamtam.ai/c/standish-management-llc) (standishmanagement.com)<br>Specialized fund administration services for private equity funds, offering consulting and technology solutions to accelerate fund launches and scale operations efficiently | Venture Capital and Private Equity Principals | 🇺🇸 San Francisco | 927 | 2007 |
| 26 | [Novogradac](https://www.tamtam.ai/c/novogradac) (novoco.com)<br>Accounting and consulting services specializing in real estate, affordable housing, community development, renewable energy, and valuation for national clients. | Accounting | 🇺🇸 San Francisco | 829 | 1989 |
| 27 | [Newfront](https://www.tamtam.ai/c/newfront) (newfront.com)<br>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. | Insurance | 🇺🇸 San Francisco | 800 | 2017 |
| 28 | [Springbox](https://www.tamtam.ai/c/springbox) (prophet.com)<br>Prophet is a consulting firm that helps leaders achieve purposeful, transformative, and sustainable growth through strategic solutions and creative capabilities | Professional Services | 🇺🇸 San Francisco | 790 | 1992 |
| 29 | [BSR](https://www.tamtam.ai/c/bsr) (bsr.org)<br>A sustainable business network and consultancy providing insight, advice, and collaborative initiatives for member companies to create long-term value | Business Consulting and Services | 🇺🇸 San Francisco | 783 | 1992 |
| 30 | [GCA](https://www.tamtam.ai/c/gca) (hl.com)<br>A global investment bank providing M&A, capital markets, and private funds advisory services to growth companies worldwide in various sectors | Investment Banking | 🇺🇸 San Francisco | 761 |  |

## 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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Source: https://www.tamtam.ai/l/professional-services-firms-san-francisco