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.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Remoteremote.com
Comprehensive HR and payroll platform enabling companies to hire, manage, and pay employees worldwide with compliance and local expertise. |
12,042 | |||
| 2 | 9,873 | ||||
| 3 |
Magnit Globalmagnitglobal.com
Global leader in contingent workforce management, offering an Integrated Workforce Management platform for optimizing talent, diversity, operational, and financial success |
3,927 | |||
| 4 | 3,037 | ||||
| 5 |
Accurate Backgroundaccurate.com
Global provider of employment background screening and workforce monitoring services, ensuring smarter hiring decisions with comprehensive technology, extensive coverage, and intuitive compliance tools |
1,899 | |||
| 6 |
OptimHireoptimhire.com
Facilitating global collaboration, OptimHire revolutionizes the way professionals, recruiters, and companies work together anytime, anywhere across time zones and countries |
1,673 | |||
| 7 |
Part Time Jobs Baseparttimebase.co
The company helps individuals find part-time jobs and work from home opportunities in the United States |
1,569 | |||
| 8 | 1,567 | ||||
| 9 |
Oyster®oysterhr.com
This company facilitates global hiring, enabling companies to easily recruit talent from anywhere, striving for a more inclusive and equal world |
595 | |||
| 10 |
NutritionJobsnutritionjobs.com
An online career center connecting Registered Dietitians and nutrition professionals with job opportunities, resume posting, and career courses since 2000 |
568 | |||
| 11 |
Virtual Latinosvirtuallatinos.com
A platform connecting entrepreneurs and agencies in the US and Canada with virtual assistants and professionals from Latin America |
558 | |||
| 12 |
SSPsemistaffing.com
SSP is a dedicated firm specializing in sourcing top talent for industry leaders, both domestically and internationally, driving client growth |
537 | |||
| 13 |
TCWGlobaltcwglobal.com
Global provider of solutions for expanding national and global teams, specializing in contingent workforce management, compliance, staffing, and international employment services |
501 | |||
| 14 | 272 | ||||
| 15 |
Talogy, previously PANtalogy.com
Talogy is a talent management company that offers solutions for screening, selecting, developing, and engaging talent globally using psychology and technology |
253 | |||
| 16 |
TriNet Zenefitstrinet.com
Provides SMBs with HR solutions including PEO and HRIS services as part of TriNet, a company listed on NYSE |
227 | |||
| 17 |
Formajoinforma.com
A benefits platform providing employees with personalized health and wellness options to choose from, promoting freedom and well-being |
215 | |||
| 18 |
HR That Workshrsherpas.com
A network of HR Experts led by veteran attorney Don Phin, offering support with compliance, hiring, training, coaching, and more |
182 | |||
| 19 |
Serviconservicon.com
The company offers top-notch custodial, environmental, and maintenance services for intricate facilities, ensuring high quality and efficient solutions |
174 | |||
| 20 |
Innovative Employee Solutions (IES)innovativeemployeesolutions.com
Global provider of contingent workforce solutions including Employer of Record Payrolling, Independent Contractor Compliance, HR Administration, and Back Office services in 150+ countries |
160 | |||
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. | |||||
| 21 |
Pierpoint Internationalpierpoint.com
Designing and delivering custom recruitment solutions, including RPO, workforce planning, and talent acquisition services for mid-sized and large enterprises globally |
155 | |||
| 22 |
Clinical Management Consultantsclinicalmanagementconsultants.com
A national healthcare recruitment provider offering permanent placement and interim leadership to hospitals and healthcare organizations across the US |
152 | |||
| 23 | 151 | ||||
| 24 |
Transformtransform.us
A platform connecting people-driven leaders, entrepreneurs, and investors to influence strategy, foster innovation, and shape the future of work |
128 | |||
| 25 |
Fondrewardgateway.com
A US rewards and recognition platform providing customizable employee programs with monetary and non-monetary rewards, catering to enterprise customers |
72 | |||
| 26 | 69 | ||||
| 27 |
FlyHigh Group, Inc.flyhightalent.com
A global provider of talent-centered integrated business solutions, offering services in talent acquisition, education, consultation, community, and entrepreneurship worldwide |
58 | |||
| 28 |
OnePoint Human Capital Managementonehcm.com
Enterprise HCM solutions, payroll, and business process outsourcing services for growing companies to streamline HR functions, lower costs, and ensure compliance |
37 | |||
| 29 |
Workforce Junctionworkforcejunction.com
Specialty technology partner empowering benefit advisors and small to mid-size businesses with custom solutions for leveraging technology in business strategies |
26 | |||
| 30 |
Focused Staffingfocusedstaffing.com
A highly successful Boutique Recruiting Agency in the US with a high referral rate, specializing in bringing world class candidates to clients |
22 | |||
| 31 |
Ellavateellavate-inc.com
This company develops innovative people solutions to help organizations attract, retain talent, and build sustainable cultures during hyper-growth and beyond |
22 | |||
| 32 |
StarMeUpstarmeup.com
A talent empowerment platform focused on cultivating people-first company cultures to drive business success |
19 | |||
| 33 |
Jugo
A food production company located in Tampico, Mexico specializing in serving high quality food products to its customers |
11 | |||
| 34 |
Via.work - Acquired by Justworksjustworks.com
A digital platform for companies to easily manage payroll, benefits, and HR processes for international workers with full compliance |
10 | |||
| 35 |
NHCInataliehelenconsulting.com
A consulting firm specializing in talent acquisition, culture initiatives, HR processes, and special projects to help organizations achieve growth targets |
8 | |||
| 36 | 6 | ||||
| 37 |
4iGroup - Leaders | Cultures | Futures4i.au
4iGroup develops leaders, enhances team cultures, and shapes organizational futures through leadership coaching, consulting, talent advisory, and sales leadership programs |
5 | |||
| 38 |
Strategic Global Talentstrategicglobaltalent.com
A consultancy specializing in organizational design, recruitment, change management, leadership development, compliance, and employee engagement to help businesses grow and succeed |
3 | |||
| 39 |
Keysolutiontech LLCkeysolutiontech.com
A global company providing IT consulting, staff augmentation, project management, product engineering, and BPO services with a focus on recruitment from India |
2 | |||
| 40 |
DisruptHR San Francisco Bay Area
A thought leadership community empowering executives to improve talent management with a focus on trust, hybrid work, and disruptions |
2 | |||
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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 13, 2026.
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The same list elsewhere in United States
- Human Resources Services companies in the United States 291
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