# 40 leading Human Resources Services companies in California

Tamtam tracks 40 Human Resources Services companies headquartered in California. This list ranks all of them by number of employees on LinkedIn, led by Remote, Deel and Magnit Global. Their median headcount is 160. Half of them were founded in 2015 or later. The most common headquarters are San Francisco (10), San Diego (6) and Los Angeles (3).

This selection of Human Resources Services companies in California includes a mix of large established firms and younger companies founded in the last five years. Many focus on global hiring and remote work solutions. For instance, Remote and Deel both provide comprehensive HR and payroll platforms for managing international workforces. Magnit Global specializes in contingent workforce management, while Accurate Background offers employment background screening services. OptimHire facilitates global collaboration between professionals and companies, and Oyster® enables companies to recruit talent from anywhere.

A notable pattern among these companies is the concentration of headquarters in San Francisco, which hosts several of the larger firms like Remote, Deel, OptimHire, and Oyster®. Other significant locations include Folsom, Irvine, and Los Angeles, indicating a broad distribution across California, with a strong emphasis on technology-driven HR solutions.

🇺🇸 California · 40 companies · Updated Nov 13, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Remote](https://www.tamtam.ai/c/remote-san-francisco) (remote.com)<br>Comprehensive HR and payroll platform enabling companies to hire, manage, and pay employees worldwide with compliance and local expertise. | Human Resources Services | 🇺🇸 San Francisco | 12,042 | 2019 |
| 2 | [Deel](https://www.tamtam.ai/c/deel) (deel.com)<br>Platform offering HR tools, payroll, compliance, and mobility services to help companies manage and scale international workforces efficiently. | Human Resources Services | 🇺🇸 San Francisco | 9,873 | 2019 |
| 3 | [Magnit Global](https://www.tamtam.ai/c/magnit-global) (magnitglobal.com)<br>Global leader in contingent workforce management, offering an Integrated Workforce Management platform for optimizing talent, diversity, operational, and financial success | Human Resources Services | 🇺🇸 Folsom | 3,927 | 1991 |
| 4 | [Work From Home](https://www.tamtam.ai/c/work-from-home-modesto) (jobeelo.com)<br>Specializes in providing work from home job opportunities | Human Resources Services | 🇺🇸 Modesto | 3,037 |  |
| 5 | [Accurate Background](https://www.tamtam.ai/c/accurate-background) (accurate.com)<br>Global provider of employment background screening and workforce monitoring services, ensuring smarter hiring decisions with comprehensive technology, extensive coverage, and intuitive compliance tools | Human Resources Services | 🇺🇸 Irvine | 1,899 | 1997 |
| 6 | [OptimHire](https://www.tamtam.ai/c/optimhire) (optimhire.com)<br>Facilitating global collaboration, OptimHire revolutionizes the way professionals, recruiters, and companies work together anytime, anywhere across time zones and countries | Human Resources Services | 🇺🇸 San Francisco | 1,673 | 2018 |
| 7 | [Part Time Jobs Base](https://www.tamtam.ai/c/part-time-jobs-base) (parttimebase.co)<br>The company helps individuals find part-time jobs and work from home opportunities in the United States | Human Resources Services | 🇺🇸 Los Angeles | 1,569 | 2015 |
| 8 | [Edge](https://www.tamtam.ai/c/edge-mountain-view) (onedge.co)<br>This company offers a global HR solution connecting talent worldwide with businesses in North America, aiming to eliminate geographic barriers in hiring | Human Resources Services | 🇺🇸 Mountain View | 1,567 | 2022 |
| 9 | [Oyster®](https://www.tamtam.ai/c/oyster) (oysterhr.com)<br>This company facilitates global hiring, enabling companies to easily recruit talent from anywhere, striving for a more inclusive and equal world | Human Resources Services | 🇺🇸 San Francisco | 595 | 2020 |
| 10 | [NutritionJobs](https://www.tamtam.ai/c/nutritionjobs) (nutritionjobs.com)<br>An online career center connecting Registered Dietitians and nutrition professionals with job opportunities, resume posting, and career courses since 2000 | Human Resources Services | 🇺🇸 San Francisco | 568 | 2000 |
| 11 | [Virtual Latinos](https://www.tamtam.ai/c/virtual-latinos) (virtuallatinos.com)<br>A platform connecting entrepreneurs and agencies in the US and Canada with virtual assistants and professionals from Latin America | Human Resources Services | 🇺🇸 San Diego | 558 | 2018 |
| 12 | [SSP](https://www.tamtam.ai/c/ssp-san-jose) (semistaffing.com)<br>SSP is a dedicated firm specializing in sourcing top talent for industry leaders, both domestically and internationally, driving client growth | Human Resources Services | 🇺🇸 San Jose | 537 | 2011 |
| 13 | [TCWGlobal](https://www.tamtam.ai/c/tcwglobal) (tcwglobal.com)<br>Global provider of solutions for expanding national and global teams, specializing in contingent workforce management, compliance, staffing, and international employment services | Human Resources Services | 🇺🇸 San Diego | 501 | 2010 |
| 14 | [INTOO](https://www.tamtam.ai/c/intoo) (intoo.com)<br>Global leader in HR and talent solutions, specializing in career development, coaching, mentoring, change management, and outplacement services worldwide | Human Resources Services | 🇺🇸 Los Angeles | 272 | 1991 |
| 15 | [Talogy, previously PAN](https://www.tamtam.ai/c/talogy-previously-pan) (talogy.com)<br>Talogy is a talent management company that offers solutions for screening, selecting, developing, and engaging talent globally using psychology and technology | Human Resources Services | 🇺🇸 Glendale | 253 | 1946 |
| 16 | [TriNet Zenefits](https://www.tamtam.ai/c/trinet-zenefits) (trinet.com)<br>Provides SMBs with HR solutions including PEO and HRIS services as part of TriNet, a company listed on NYSE | Human Resources Services | 🇺🇸 San Francisco | 227 |  |
| 17 | [Forma](https://www.tamtam.ai/c/forma) (joinforma.com)<br>A benefits platform providing employees with personalized health and wellness options to choose from, promoting freedom and well-being | Human Resources Services | 🇺🇸 San Francisco | 215 | 2017 |
| 18 | [HR That Works](https://www.tamtam.ai/c/hr-that-works) (hrsherpas.com)<br>A network of HR Experts led by veteran attorney Don Phin, offering support with compliance, hiring, training, coaching, and more | Human Resources Services | 🇺🇸 San Diego | 182 | 2016 |
| 19 | [Servicon](https://www.tamtam.ai/c/servicon-culver-city) (servicon.com)<br>The company offers top-notch custodial, environmental, and maintenance services for intricate facilities, ensuring high quality and efficient solutions | Human Resources Services | 🇺🇸 Culver City | 174 | 1973 |
| 20 | [Innovative Employee Solutions (IES)](https://www.tamtam.ai/c/innovative-employee-solutions-ies) (innovativeemployeesolutions.com)<br>Global provider of contingent workforce solutions including Employer of Record Payrolling, Independent Contractor Compliance, HR Administration, and Back Office services in 150+ countries | Human Resources Services | 🇺🇸 San Diego | 160 | 1974 |
| 21 | [Pierpoint International](https://www.tamtam.ai/c/pierpoint-international) (pierpoint.com)<br>Designing and delivering custom recruitment solutions, including RPO, workforce planning, and talent acquisition services for mid-sized and large enterprises globally | Human Resources Services | 🇺🇸 San Jose | 155 | 2003 |
| 22 | [Clinical Management Consultants](https://www.tamtam.ai/c/clinical-management-consultants) (clinicalmanagementconsultants.com)<br>A national healthcare recruitment provider offering permanent placement and interim leadership to hospitals and healthcare organizations across the US | Human Resources Services | 🇺🇸 San Francisco | 152 | 2008 |
| 23 | [AnyPerk](https://www.tamtam.ai/c/anyperk) (fond.co)<br>The company specializes in enhancing company cultures by offering employee engagement products for rewards, recognition, perks, and sentiment measurement programs | Human Resources Services | 🇺🇸 Sunnyvale | 151 | 2012 |
| 24 | [Transform](https://www.tamtam.ai/c/transform-san-mateo) (transform.us)<br>A platform connecting people-driven leaders, entrepreneurs, and investors to influence strategy, foster innovation, and shape the future of work | Human Resources Services | 🇺🇸 San Mateo | 128 | 2017 |
| 25 | [Fond](https://www.tamtam.ai/c/fond) (rewardgateway.com)<br>A US rewards and recognition platform providing customizable employee programs with monetary and non-monetary rewards, catering to enterprise customers | Human Resources Services | 🇺🇸 San Francisco | 72 | 2012 |
| 26 | [CPEhr](https://www.tamtam.ai/c/cpehr) (cpehr.com)<br>A leading HR consulting, outsourcing, and PEO firm providing a wide range of services including HR policies, employee benefits, payroll, training, and recruitment | Human Resources Services | 🇺🇸 Burbank | 69 | 1982 |
| 27 | [FlyHigh Group, Inc.](https://www.tamtam.ai/c/flyhigh-group-inc) (flyhightalent.com)<br>A global provider of talent-centered integrated business solutions, offering services in talent acquisition, education, consultation, community, and entrepreneurship worldwide | Human Resources Services | 🇺🇸 Santa Clara | 58 | 2015 |
| 28 | [OnePoint Human Capital Management](https://www.tamtam.ai/c/onepoint-human-capital-management) (onehcm.com)<br>Enterprise HCM solutions, payroll, and business process outsourcing services for growing companies to streamline HR functions, lower costs, and ensure compliance | Human Resources Services | 🇺🇸 Selma | 37 | 2008 |
| 29 | [Workforce Junction](https://www.tamtam.ai/c/workforce-junction) (workforcejunction.com)<br>Specialty technology partner empowering benefit advisors and small to mid-size businesses with custom solutions for leveraging technology in business strategies | Human Resources Services | 🇺🇸 Pleasanton | 26 | 2019 |
| 30 | [Focused Staffing](https://www.tamtam.ai/c/focused-staffing) (focusedstaffing.com)<br>A highly successful Boutique Recruiting Agency in the US with a high referral rate, specializing in bringing world class candidates to clients | Human Resources Services | 🇺🇸 San Jose | 22 | 2005 |
| 31 | [Ellavate](https://www.tamtam.ai/c/ellavate) (ellavate-inc.com)<br>This company develops innovative people solutions to help organizations attract, retain talent, and build sustainable cultures during hyper-growth and beyond | Human Resources Services | 🇺🇸 Los Angeles | 22 | 2018 |
| 32 | [StarMeUp](https://www.tamtam.ai/c/starmeup) (starmeup.com)<br>A talent empowerment platform focused on cultivating people-first company cultures to drive business success | Human Resources Services | 🇺🇸 San Francisco | 19 |  |
| 33 | [Jugo](https://www.tamtam.ai/c/jugo)<br>A food production company located in Tampico, Mexico specializing in serving high quality food products to its customers | Human Resources Services | 🇺🇸 Aptos | 11 |  |
| 34 | [Via.work - Acquired by Justworks](https://www.tamtam.ai/c/via-work-acquired-by-justworks) (justworks.com)<br>A digital platform for companies to easily manage payroll, benefits, and HR processes for international workers with full compliance | Human Resources Services | 🇺🇸 Palo Alto | 10 | 2021 |
| 35 | [NHCI](https://www.tamtam.ai/c/nhci) (nataliehelenconsulting.com)<br>A consulting firm specializing in talent acquisition, culture initiatives, HR processes, and special projects to help organizations achieve growth targets | Human Resources Services | 🇺🇸 San Diego | 8 | 2015 |
| 36 | [AmiHR](https://www.tamtam.ai/c/amihr) (amihr.com)<br>The company helps businesses manage HR and payroll needs, offering cost-saving solutions and a wide range of services including training, recruiting, and compliance | Human Resources Services | 🇺🇸 Lincoln | 6 | 2011 |
| 37 | [4iGroup - Leaders \| Cultures \| Futures](https://www.tamtam.ai/c/4igroup-leaders-cultures-futures) (4i.au)<br>4iGroup develops leaders, enhances team cultures, and shapes organizational futures through leadership coaching, consulting, talent advisory, and sales leadership programs | Human Resources Services | 🇺🇸 Sydney & Los Angeles | 5 | 2016 |
| 38 | [Strategic Global Talent](https://www.tamtam.ai/c/strategic-global-talent) (strategicglobaltalent.com)<br>A consultancy specializing in organizational design, recruitment, change management, leadership development, compliance, and employee engagement to help businesses grow and succeed | Human Resources Services | 🇺🇸 Studio City | 3 | 2017 |
| 39 | [Keysolutiontech LLC](https://www.tamtam.ai/c/keysolutiontech-llc) (keysolutiontech.com)<br>A global company providing IT consulting, staff augmentation, project management, product engineering, and BPO services with a focus on recruitment from India | Human Resources Services | 🇺🇸 San Diego | 2 | 2005 |
| 40 | [DisruptHR San Francisco Bay Area](https://www.tamtam.ai/c/disrupthr-san-francisco-bay-area)<br>A thought leadership community empowering executives to improve talent management with a focus on trust, hybrid work, and disruptions | Human Resources Services | 🇺🇸 Redwood City | 2 | 2017 |

## 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 13, 2026.

## More company lists in California

- [The largest companies in California](https://www.tamtam.ai/l/largest-companies-california) (15,259)
- [Multinational companies in California](https://www.tamtam.ai/l/multinational-companies-california) (2,587)
- [SaaS companies in California](https://www.tamtam.ai/l/saas-companies-california) (1,854)
- [Software Development companies in California](https://www.tamtam.ai/l/software-development-companies-california) (1,649)
- [AI companies in California](https://www.tamtam.ai/l/ai-companies-california) (1,296)
- [Companies with in-house R&D in California](https://www.tamtam.ai/l/r-and-d-companies-california) (1,272)
- [Manufacturers in California](https://www.tamtam.ai/l/manufacturers-california) (1,065)
- [Hardware manufacturers in California](https://www.tamtam.ai/l/hardware-companies-california) (984)
- [IT Services and IT Consulting companies in California](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-california) (968)
- [Education providers in California](https://www.tamtam.ai/l/education-companies-california-united-states) (950)
- [Subscription businesses in California](https://www.tamtam.ai/l/subscription-businesses-california) (939)
- [Venture capital and private equity firms in California](https://www.tamtam.ai/l/vc-and-private-equity-firms-california) (917)
- [Professional services firms in California](https://www.tamtam.ai/l/professional-services-firms-california) (880)
- [Companies with a mobile app in California](https://www.tamtam.ai/l/companies-with-mobile-app-california) (827)
- [Retail chains in California](https://www.tamtam.ai/l/retail-chains-california) (802)
- [IT services companies in California](https://www.tamtam.ai/l/it-services-companies-california) (796)
- [Venture Capital and Private Equity Principals companies in California](https://www.tamtam.ai/l/venture-capital-and-private-equity-principals-companies-california) (731)
- [Financial services firms in California](https://www.tamtam.ai/l/financial-services-firms-california) (711)
- [Financial Services companies in California](https://www.tamtam.ai/l/financial-services-companies-california) (642)
- [Healthcare providers in California](https://www.tamtam.ai/l/healthcare-providers-california) (569)
- [AI-native companies in California](https://www.tamtam.ai/l/ai-native-companies-california) (561)
- [Hospitals and Health Care companies in California](https://www.tamtam.ai/l/hospitals-and-health-care-companies-california) (555)
- [Consulting firms in California](https://www.tamtam.ai/l/consulting-firms-california) (551)
- [Public sector organisations in California](https://www.tamtam.ai/l/public-sector-organisations-california) (536)

## The same list elsewhere in United States

- [Human Resources Services companies in the United States](https://www.tamtam.ai/l/human-resources-services-companies-united-states) (291)
- [Human Resources Services companies in New York State](https://www.tamtam.ai/l/human-resources-services-companies-new-york-state) (26)
- [Human Resources Services companies in Texas](https://www.tamtam.ai/l/human-resources-services-companies-texas) (26)

## The same list elsewhere

- [Human Resources Services companies in the world](https://www.tamtam.ai/l/human-resources-services-companies-in-the-world) (2,224)
- [Human Resources Services companies in North America](https://www.tamtam.ai/l/human-resources-services-companies-in-north-america) (361)

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Source: https://www.tamtam.ai/l/human-resources-services-companies-california