Best NIST SP 800-53 Compliance Services
Find 17 verified NIST SP 800-53 compliance partners. Consultants, auditors, and software to streamline your compliance journey. As of September 2026, ISMS Directory lists 17 verified providers for this search, ranked by real 30-day buyer demand on the directory (not paid placement).
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ISMS Copilot
Compliance AI engine for 75+ frameworks including ISO 27001, SOC 2, GDPR, NIS2, DORA, and ISO 42001. Chat for practitioners. OpenAI-compatible API and embed for products and partners.
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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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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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Coalfire
Enterprise cybersecurity and compliance assessment firm for FedRAMP, SOC 2, HITRUST, PCI, ISO 27001, and government frameworks.
Matched on: NIST SP 800-53
Why am I seeing this? An independent provider, selected by coverage match and 30-day directory demand. No vendor can pay for this spot.
CyberSaint
Boston cyber GRC platform (CyberStrong) for NIST-oriented risk, control testing, and vendor risk.
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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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Coalfire
Enterprise cybersecurity and compliance assessment firm for FedRAMP, SOC 2, HITRUST, PCI, ISO 27001, and government frameworks.
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CyberPulse
CyberPulse is an Australian cybersecurity and GRC consultancy specialising in audit and compliance. We deliver ISO 27001, Essential Eight, and NIST CSF audits, GRC advisory, vCISO, and managed compliance—helping you achieve and maintain certification with penetration testing and continuous assurance.
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Oneleet
Security-first compliance platform that consolidates penetration testing, code scanning, and compliance into one integrated solution.
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Scrut Automation
Scrut Automation simplifies continuous compliance automation for cloud-native companies.
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Withum
US CPA firm with a technology attestation practice frequently used for SOC 2 by SaaS companies.
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Scytale
AI-powered compliance automation platform with dedicated human experts, supporting 60+ security and privacy frameworks.
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Lazarus Alliance
US assessor for SOC 2, FedRAMP, CMMC, and related federal-adjacent security audits.
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Hyperproof
Intelligent GRC platform that transforms compliance from a cost center into a competitive advantage with AI-powered automation.
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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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Carbide
Canadian security and privacy management platform combining software automation with expert advisory for fast-growing companies.
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ISMS Copilot Account MCP
Talk to a specialist compliance AI from the harness you already use. Hosted remote MCP server (HTTP, Streamable HTTP) for Claude Code, Cursor, Codex, or any MCP client.
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ISMS Copilot Model API
OpenAI-compatible text-only compliance completions: curated framework knowledge (100+ modules) injected before generation and disclosed on success.
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