These firms have a published office in California. A firm may also have offices elsewhere. Listings are checked facts, not endorsements or rankings.
HQ: United StatesVerified
PCI DSSHITRUSTISO 27001ISO 27701 +1
US accounting and consulting firm (first-listed office San Ramon, CA); listed as a PCI Qualified Security Assessor company and HITRUST External Assessor, with an ANAB-accredited ISO certification body (Armanino Certified, LLC).
San Ramon, California · Chicago, Illinois · New York, New York · +2 more
HQ: United StatesVerified
SOC 1SOC 2HITRUSTCMMC
CPA and advisory firm with offices across the US; performs SOC 1 and SOC 2 examinations and is listed as a HITRUST External Assessor and CMMC C3PAO.
Raleigh, North Carolina · Carlsbad, California · Torrance, California · +51 more
HQ: United StatesVerified
ISO 27001ISO 27701
Certification body with a North America office in El Dorado Hills, California; ANAB-accredited for ISO 27001 and ISO 27701 certification audits.
El Dorado Hills, California
HQ: United StatesVerified
SOC 2HITRUSTHIPAA
Encinitas, California compliance firm listed as a HITRUST External Assessor; SOC 2 attestation reports are issued through its licensed CPA firm, CyberCrest Controls RLLP.
Encinitas, California
HQ: United StatesVerified
SOC 1SOC 2HITRUSTHIPAA
San Jose, California CPA firm offering SOC 1 and SOC 2 examinations, listed as a HITRUST External Assessor; offers HIPAA compliance services.
San Jose, California
HQ: United StatesVerified
ISO 27001FedRAMPHITRUST
US member firm of the Deloitte network. ANAB-accredited ISO/IEC 27001 certification body, FedRAMP-recognized third-party assessor and HITRUST External Assessor.
New York, New York · Chicago, Illinois · Arlington, Virginia · +15 more
HQ: United StatesVerified
PCI DSSHITRUST
US member firm of the EY global network; listed as a PCI DSS Qualified Security Assessor and a HITRUST External Assessor.
New York, New York · Chicago, Illinois · San Francisco, California · +11 more
HQ: United StatesVerified
HITRUSTPCI DSSCMMC
US accounting and advisory firm with offices in many states; listed as a PCI QSA, HITRUST External Assessor and CMMC C3PAO.
Charlotte, North Carolina · Appleton, Wisconsin · Asheville, North Carolina · +72 more
HQ: United StatesVerified
SOC 1SOC 2ISO 27001ISO 27701
Licensed CPA firm with offices in California and Utah performing SOC 1 and SOC 2 examinations, with an affiliated ANAB-accredited entity for ISO/IEC 27001 and ISO/IEC 27701 certification.
Palo Alto, California · Sacramento, California · San Diego, California · +4 more
HQ: United StatesVerified
CMMC
Huntsville, Alabama cybersecurity and IT firm listed as an authorized CMMC Third-Party Assessment Organization (C3PAO).
Huntsville, Alabama · Glendale, California
HQ: United StatesVerified
ISO 27001
Management-system certification body of IAPMO R&T with its US office in Ontario, California, offering accredited ISO/IEC 27001 certification.
Ontario, California
HQ: United StatesVerified
PCI DSS
Newport Beach, California information security firm listed as a PCI QSA.
Newport Beach, California
HQ: United StatesVerified
HITRUSTHIPAA
Alameda, California IT and compliance firm listed as a HITRUST External Assessor; also offers HIPAA risk assessments.
Alameda, California
HQ: United StatesVerified
SOC 1SOC 2HITRUSTPCI DSS
Licensed CPA firm with a Nashville corporate office performing SOC, HITRUST and PCI DSS assessments, with locations listed in ten US cities.
Nashville, Tennessee · Atlanta, Georgia · Bethesda, Maryland · +7 more
HQ: United StatesVerified
CMMC
Carlsbad, California cybersecurity firm listed as an authorized CMMC Third-Party Assessment Organization (C3PAO).
Carlsbad, California
HQ: United StatesVerified
FedRAMPPCI DSS
US member firm of the KPMG network. FedRAMP-recognized third-party assessor and PCI Qualified Security Assessor company.
New York, New York · Chicago, Illinois · McLean, Virginia · +9 more
CERT-In
Noida-headquartered cybersecurity company with a Cupertino, California office; listed as a CERT-In empanelled information security auditor.
Noida, Uttar Pradesh · Cupertino, California
HQ: United StatesVerified
PCI DSS
Wichita, Kansas cybersecurity services firm with US offices in seven more states, listed as a PCI Qualified Security Assessor (QSA) company.
Wichita, Kansas · Paso Robles, California · Tempe, Arizona · +5 more
PCI DSS
Tokyo-based security services firm listed by the PCI SSC as a QSA company, with offices in Yokohama, Osaka and Irvine, California.
Tokyo, Tokyo · Yokohama, Kanagawa · Osaka, Osaka · +1 more
HQ: United StatesVerified
PCI DSSHITRUST
Leawood, Kansas cybersecurity firm listed as a PCI Qualified Security Assessor (QSA) company and a HITRUST External Assessor.
Leawood, Kansas · Newport Beach, California
HQ: United StatesVerified
HITRUSTPCI DSS
Menlo Park-based consulting firm offering PCI DSS assessments as a QSA company and HITRUST assessments as an authorized external assessor.
Menlo Park, California
HQ: United StatesVerified
SOC 1SOC 2ISO 27001ISO 27701 +3
California accounting and consulting firm whose GRC practice performs SOC, ISO and HITRUST engagements; its Drata directory listing describes its audits as remote-first.
San Jose, California · San Mateo, California · San Ramon, California · +3 more
HQ: United StatesVerified
FedRAMPCMMCGovRAMP
Huntsville, Alabama cybersecurity firm listed as a FedRAMP 3PAO and CMMC C3PAO.
Huntsville, Alabama · North Charleston, South Carolina · Columbia, Maryland · +2 more
HQ: United StatesVerified
HITRUSTPCI DSSFedRAMPCMMC
Irvine, California cybersecurity firm listed as a FedRAMP 3PAO, PCI QSA, HITRUST External Assessor and CMMC C3PAO.
Irvine, California · Fairfax, Virginia · Scottsdale, Arizona
HQ: United StatesVerified
HITRUST
San Francisco-based law firm offering HITRUST readiness and certification services and privacy compliance work, listed by HITRUST as an External Assessor.
San Francisco, California
HQ: United StatesVerified
PCI DSS
Los Angeles IT consulting and security firm listed as a PCI Qualified Security Assessor (QSA) company.
Los Angeles, California
FAQ
How many audit firms are listed in California?
26 Verified firms have a published office in California. Pages exist only where at least 3 Verified firms match. This is not a ranking.
Which registry listings do you check?
Firms on this page appear because an official registry listed them for at least one published framework (SOC 1, SOC 2, ISO 27001, ISO 27701, HITRUST, PCI DSS, FedRAMP, CMMC, HIPAA). Each firm page names the registry row and the date checked.
Which cities in California have the most listed firms?
Chicago (7), Dallas (7), New York (7), San Francisco (7), Atlanta (6), Los Angeles (6).
How do I get matched with a listed firm?
Use Get matched or the auditor-match form on this page. A listing is a set of checked facts, not an endorsement, and we do not email firms automatically. Get matched.