How many staffing and outsourcing agencies are in California, United States?

178 are listed on Agency List in California, United States. 4 of them have been assessed on the Agency List Score as of September 2026, and 2 of those carry a published score.

Which staffing and outsourcing agency in California, United States is ranked highest?

Kenz Innovation HCM, with an Agency List Score of 78.0, ranks #1 of 4 assessed agencies in Staffing and Outsourcing in California, United States.

How is the ranking determined?

By Agency List Score, within the Staffing and Outsourcing in California, United States cohort of 4 assessed agencies. The score is computed from evidence published on each agency's own website: named clients, quantified outcomes, and whether the outcome is attributed to the agency. Paid placement does not affect it.

Top Staffing and Outsourcing Agencies in California, United States

Ranked · 2 of 4 assessed

Ordered by Agency List Score

#1 of 4 assessed

Kenz Innovation HCM

Verified

Unified HCM platform for HR, payroll, and benefits management

Back Office ServicesCustomer Support BPOData Entry and Annotation

View profile

#2 of 4 assessed

eWorkplace Apps

Verified

ERP solutions for Acumatica, enhancing manufacturing and quality management

Back Office ServicesCustomer Support BPOData Entry and Annotation

View profile

Also in California · 176 not ranked here

174 have not yet been assessed on the Agency List Score. Alphabetical.

31WestView profile →365 Healthcare Staffing ServicesView profile →40HRSView profile →A LINE STUDIOView profile →A-Star StaffingView profile →A10 NetworksView profile →AccendnetworksView profile →Ace TechnologiesView profile →ACTAXView profile →Ad ClubView profile →Adopt The Highway CompaniesView profile →AFCOM TECHNOLOGIESView profile →Alan J. BlairView profile →Align Workforce SolutionsView profile →Alliance Resource ConsultingView profile →AlpineinvestorsView profile →Amara Grimes DesignView profile →American Labor PoolView profile →Andiamo GroupView profile →Antelope Valley Call CenterView profile →ApexView profile →Apex Ascent AdvisorsView profile →Apollo Business CentersView profile →ArabiclanguageserviceView profile →

78 more listed here are not shown on this page.

About this ranking

What this page ranks

This page ranks 2 of the 4 assessed staffing and outsourcing agencies in California, United States — the ones carrying a published score — out of 178 listed.

The score measures how well an agency documents its own work in public — named clients, quantified outcomes, and whether those outcomes are attributed to the agency rather than described as the client's own results. It does not measure client satisfaction, price, or availability.

Cohorts and awards

Agencies are compared within a cohort — here, Staffing and Outsourcing in California, United States. A cohort must be large enough to express the band being awarded: at least 8 assessed agencies for a top 25% award, 20 for top 10%, 40 for top 5%, and 300 for top 1%. This one holds 4, so no award can be issued here.

The 174 staffing and outsourcing agencies not yet assessed are listed on this page but not ranked.

A further 2 were assessed and no published evidence of their work was found, so no score is shown for them.

Read the full methodology

Paid placement

Partner agencies can buy a labelled placement block above the ranking on this page. It is always marked as paid and is never mixed into the ranked list.

Placement is paid; it does not affect the ranking, cohort membership, or any agency's score. Ranking position, cohort membership and the score itself are not for sale.

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Questions

How many staffing and outsourcing agencies are in California, United States?: 178 are listed on Agency List in California, United States. 4 of them have been assessed on the Agency List Score as of September 2026, and 2 of those carry a published score.
Which staffing and outsourcing agency in California, United States is ranked highest?: Kenz Innovation HCM, with an Agency List Score of 78.0, ranks #1 of 4 assessed agencies in Staffing and Outsourcing in California, United States.
Why are 176 staffing and outsourcing agencies listed here but not ranked?: 174 of the 178 listed have not yet been assessed on the Agency List Score. A further 2 were assessed and no published evidence of their work was found, so no score is shown for them. They each have a profile and are listed below the ranking, alphabetically, rather than being hidden or mixed into it.
How is the ranking determined?: By Agency List Score, within the Staffing and Outsourcing in California, United States cohort of 4 assessed agencies. The score is computed from evidence published on each agency's own website: named clients, quantified outcomes, and whether the outcome is attributed to the agency. Paid placement does not affect it.