Top NIST SP 800-53 compliance services – Verenigde Staten
Compare 12 verified NIST SP 800-53 specialists serving United States. From consultants to certification bodies, find the right partner for your compliance journey. As of November 2026, ISMS Directory lists 12 verified providers for this search, ranked by real 30-day buyer demand on the directory (not paid placement).
Tonen 12 diensten
BARR Advisory
Cloud-native compliance firm offering SOC 2 audits and ISO 27001 certification with coordinated multi-framework programs for SaaS.
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Coalfire
Enterprise cybersecurity and compliance assessment firm for FedRAMP, SOC 2, HITRUST, PCI, ISO 27001, and government frameworks.
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Johanson Group LLP
Boutique US CPA firm specializing in SOC 1/2/3 examinations and related security and compliance audits for growing companies.
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360 Advanced
US CPA and compliance assessment firm for SOC 1/2, ISO 27001, HITRUST, HIPAA, and PCI with hands-on mid-market delivery.
Matched on: NIST SP 800-53 · United States
Why am I seeing this? An independent provider, selected by coverage match and 30-day directory demand. No vendor can pay for this spot.
Withum
US CPA firm with a technology attestation practice frequently used for SOC 2 by SaaS companies.
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Schellman
Leading US IT compliance attestation firm for SOC 1/2/3, PCI, and ANAB-accredited ISO certifications including ISO 27001 and ISO 42001.
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CyberSaint
Boston cyber GRC platform (CyberStrong) for NIST-oriented risk, control testing, and vendor risk.
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Responsum
Got it! Here's a brief service description for Responsum.eu: Responsum offers personalized, GDPR-compliant data protection and privacy management solutions. Simplify compliance, enhance security, and protect your business with our expert-driven, user-friendly tools.
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Lazarus Alliance
US assessor for SOC 2, FedRAMP, CMMC, and related federal-adjacent security audits.
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Tevora
Irvine cybersecurity and compliance firm for PCI, SOC 2, ISO 27001, HITRUST, CMMC, and FedRAMP.
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ControlCase
US QSA and assessor for PCI DSS, SOC 2, ISO 27001, and related payment-security programs.
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OneTrust
Atlanta GRC and privacy platform for privacy, third-party risk, and compliance programs at enterprise scale.
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