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Top Business Service Companies in California

16 of 69 business service companies ranked on evidence in the Q4 2026 edition.

Between them, the 69 business service companies on this page cover tax (17), accounting (15), legal (8) and outsourcing (6). They also list work in San Jose, San Diego, New York and San Francisco. 69 of them have written a profile you can read before you get in touch.

TrustList ranking

Q4 2026 edition

16 of 69 business service companies ranked on evidence held on 12 October 2026: client reviews, vetting, awards and facts each business states on its own website, which we read and date. Nobody pays to be placed.

Positions are fixed for the quarter; the next edition is due in January 2027.

How this is ranked About this edition

All business service companies 16 ranked SMEs 16 ranked

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Artemis Consulting
Also in Washington
Artemis Consulting is a small, woman-owned business consultancy headquartered in San Diego, California.
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Why #1: Based in San Diego, California, USA · Founded 2005 · Team of 100+, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Gilbert
Gilbert is a full-service CPA firm offering audit, tax and advisory services to organisations in the Sacramento area.
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Why #2: Based in Sacramento area, Northern California · Founded 1984, as stated on its own website, read 9 Oct 2026
Not yet on record: client reviews, vetting.
CW Business center
Internet · Personnel · Also in Los Angeles
CW Business center is a business center in Los Angeles, California, that rents private office space by the hour or by the day.
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Why #3: Based in Los Angeles, California · Founded 1985, as stated on its own website, read 9 Oct 2026
Not yet on record: client reviews, vetting.
Anthony W. Imbimbo
Tax · Accounting · Legal · Also in San Diego
Anthony W. Imbimbo is a CPA practice in San Diego, California, with about four decades of tax experience.
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Why #4: Based in San Diego, California, USA · In business 40+ years, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Camel Financial
Camel Financial is a specialist lender that gives small and medium businesses cash against their unpaid invoices, stock and equipment.
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Why #5: Based in Riverside, California, USA · Founded 1988, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
K & G Immigration Law
Legal · Corporation · Also in United States and Los Angeles
K & G Immigration Law is a US immigration law firm with offices throughout California.
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Why #6: Based in California, USA · Founded 1989, as stated on its own website, read 9 Oct 2026
Not yet on record: client reviews, vetting.
Debt Recovery Attorneys
Legal
Debt Recovery Attorneys is a full-service debt collection law firm in Irvine, California, operating since 1995.
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Why #7: Based in Irvine, California · Founded 1995, as stated on its own website, read 9 Oct 2026
Not yet on record: client reviews, vetting.
Brent F Freeman, JR
Tax · Accounting · Legal
Brent F Freeman, JR is a certified public accountancy practice in Fresno, California, run by Brent Freeman.
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Why #8: Based in Fresno, California, USA · In business 30+ years · Owner-run, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Bharmal & Associates
Bharmal & Associates is a certified public accounting firm in Orange County, California, with offices in Irvine and Los Angeles.
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Why #9: Based in Irvine, California · In business 25+ years, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
CalTek Staffing
Manufacturing · Engineering · Personnel · Also in Texas and Dallas
CalTek Staffing is a recruitment and staffing agency for technical roles, founded in 2002 by two professional recruiters.
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Why #10: Based in San Diego, California · Founded 2002, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Bliss Events
simple · Also in France
Bliss Events is a wedding and event planning company serving San Diego County. It has coordinated celebrations since 2004, focusing on calm organisation and clear communication.
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Why #11: Based in San Diego, California · Founded 2004, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Infinity Staffing Services
Also in San Jose
Infinity Staffing Services is a temporary staffing and employment agency in Central California that places job seekers with employers.
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Why #12: Office in California · Founded 2005, as stated on its own website, read 9 Oct 2026
Not yet on record: client reviews, vetting.
Human Resources Mexico
Tax · Medical · Responsive · Also in United States
Human Resources Mexico is a professional employer organisation (PEO) in Mexico.
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Why #13: Address in California · In business 17+ years, as stated on its own website, read 9 Oct 2026
Not yet on record: client reviews, vetting.
Alam One Stop Tax and Accounting Services
Tax · Accounting · Education · Also in San Jose
Alam One Stop Tax and Accounting Services is a small, locally owned firm in San Jose, California.
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Why #14: Based in San Jose, California, USA · Founded 2015, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Hollywood Transcriptions
Hollywood Transcriptions is a transcription company based in Burbank, California.
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Why #15: Based in Burbank, California · In business 10+ years, as stated on its own website, read 9 Oct 2026
Not yet on record: client reviews, vetting.
Key People
Responsive · .NET · Scheduling
Key People is an IT recruitment agency that provides tech HR outsourcing and talent acquisition for technology companies.
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Why #16: Based in Cupertino, California, where its office is located · Founded 2018, as stated on its own website, read 9 Oct 2026
Not yet on record: client reviews, vetting.
Also listed, not yet ranked. We hold nothing checkable on these yet that ranks them here: no client review, vetting, award, expert review, or fact stated on their own website (and on a place ranking, where they are based). They follow in order of their TrustList Score. How TrustList ranks · Get vetted, free
Career Group Companies
Accounting · Education · Video · Also in Miami and New York City
Career Group Companies is a women-owned recruiting and advisory firm with specialist divisions for corporate, private, creative, fashion, events and executive hiring.
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On record: In business 45+ years, as stated on its own website, read 9 Oct 2026
Brickman Marketing
Digital Marketing · Real Estate · Education · Also in New York
Brickman Marketing is a marketing and public relations consultancy based in the Monterey area of California.
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On record: In business 30+ years, as stated on its own website, read 5 Oct 2026
Bitwage
Tax · Accounting · simple · Also in Birmingham
Bitwage is a payroll and payments service that lets employers and freelancers handle pay in cryptocurrency, stablecoins or local currency.
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On record: Founded 2014, as stated on its own website, read 5 Oct 2026
Entigrity Solutions LLC
Financial Services · Business Services · Tax · Also in Florida and Oregon
Entigrity Solutions LLC places offshore staff with accounting, CPA and tax firms in the United States, Canada and the UK.
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On record: Client numbers stated on its own website, as stated on its own website, read 9 Oct 2026
580 Executive Center
580 Executive Center provides flexible workspace in the San Francisco Bay Area.
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On record: Based in San Francisco Bay Area, California
AAFCPAs
Financial Services · Business Services · Non Profit · Also in Washington
AAFCPAs is a certified public accounting firm that positions itself as an alternative to the large national accountancies.
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Abbo Tax
Abbo Tax is a certified public accountancy practice in San Diego, California. It works only with business owners and entrepreneurs, from start-ups to established firms.
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On record: Based in San Diego, California, United States
Accounting To Taxes
Tax · Accounting · Outsourcing
Accounting To Taxes, shortened to ATT, provides outsourced accounting to businesses and accounting firms.
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On record: Address in California

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Top Business Service Companies in California

Artemis Consulting

Gilbert

CW Business center

Anthony W. Imbimbo

Camel Financial

K & G Immigration Law

Debt Recovery Attorneys

Brent F Freeman, JR

Bharmal & Associates

CalTek Staffing

Bliss Events

Infinity Staffing Services

Human Resources Mexico

Alam One Stop Tax and Accounting Services

Hollywood Transcriptions

Key People

Career Group Companies

Brickman Marketing

Bitwage

Entigrity Solutions LLC

580 Executive Center

AAFCPAs

Abbo Tax

Accounting To Taxes

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