Firms that implement NIST CSF 2.0, SP 800-53, and SP 800-171
Every firm below is a real, operating practice with a verified website and genuine work against at least one of the three NIST publications. Sponsorship never affects ranking; see our methodology.
All firms
Summit 7
Summit 7 is a cybersecurity consultancy focused on defense contractors, built around NIST SP 800-171 implementation and CMMC readiness. Its practice covers gap assessments, System Security Plans, and managed compliance for companies handling controlled unclassified information.
CyberSheath
CyberSheath provides managed compliance services for defense contractors working toward NIST SP 800-171 and CMMC requirements — combining managed security operations with compliance program management.
SecureStrux
SecureStrux is a cybersecurity consultancy serving defense and federal contractors on NIST SP 800-171 implementation, CMMC readiness, and risk management framework work.
Redspin
Redspin is a cybersecurity assessment firm and an authorized CMMC Third-Party Assessment Organization (C3PAO). It performs CMMC assessments and advises on NIST SP 800-171 readiness for the defense industrial base.
Sera-Brynn
Sera-Brynn is a cybersecurity audit and advisory firm working across compliance frameworks including NIST SP 800-171 readiness for defense contractors, alongside SOC 2, PCI DSS, and CSF programs.
Coalfire
Coalfire is a cybersecurity advisory and assessment firm with a dedicated Coalfire Federal practice. It is an authorized FedRAMP Third Party Assessment Organization (3PAO) and works across NIST SP 800-53, NIST CSF 2.0, and defense frameworks.
Schellman
Schellman is an independent assessment firm and an authorized FedRAMP 3PAO, performing 800-53-based assessments for cloud providers alongside SOC, ISO, and HITRUST audit work. Assessment-only by posture.
A-LIGN
A-LIGN is a compliance and audit firm working across NIST publications — 800-53 assessments, 800-171 readiness — alongside SOC 2, ISO 27001, and HITRUST programs.
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Get matched quotesGuidePoint Security
GuidePoint Security is a cybersecurity consultancy with a Federal Solutions practice serving agencies and contractors. Its consultants perform 800-53-based assessments, zero-trust roadmapping, and CSF 2.0 program work, and the firm holds federal contracting vehicles.
Optiv
Optiv is a cybersecurity advisory firm covering strategy, architecture, and managed security, with NIST CSF 2.0 program design and 800-53-aligned consulting for mid-market and enterprise clients.
Peak InfoSec
Peak InfoSec is a cybersecurity consulting firm working with defense contractors on NIST SP 800-171 implementation and CMMC readiness.
CyberSecOp
CyberSecOp provides managed security services alongside compliance consulting, including NIST CSF 2.0 program work and 800-171 readiness support.
StackArmor
StackArmor is a cloud security consultancy focused on helping providers meet FedRAMP, NIST SP 800-53, and defense compliance requirements on AWS and other cloud platforms.
Pivot Point Security
Pivot Point Security is an information security consulting firm working across ISO 27001, SOC 2, and NIST SP 800-171/CMMC readiness programs.
Federal & 800-53
FedRAMP 3PAO assessments, 800-53 control assessments, and federal consulting.
| Firm | Type | Planning range | Typical timeline |
|---|---|---|---|
| SecureStrux | Cybersecurity consultancy for defense and federal contractors | Not published — request a scoped quote | Varies — confirm in proposal |
| Coalfire | Cybersecurity advisory and assessment firm (Coalfire Federal for public-sector work) | Not published — request a scoped quote | Varies — confirm in proposal |
| Schellman | Independent cybersecurity assessment firm | Not published — request a scoped quote | Varies — confirm in proposal |
| A-LIGN | Cybersecurity compliance and audit firm | Not published — request a scoped quote | Varies — confirm in proposal |
| GuidePoint Security | Cybersecurity consultancy with a dedicated Federal Solutions practice | Not published — request a scoped quote | Varies — confirm in proposal |
| Optiv | Cybersecurity advisory and solutions firm | Not published — request a scoped quote | Varies — confirm in proposal |
| StackArmor | Cloud security consultancy focused on regulated industries | Not published — request a scoped quote | Varies — confirm in proposal |
Planning ranges are not quotes. See our methodology for how prices are labeled and verified.
Defense industrial base
800-171 implementation and CMMC readiness for contractors handling CUI.
| Firm | Type | Planning range | Typical timeline |
|---|---|---|---|
| Summit 7 | Cybersecurity consultancy focused on the defense industrial base | Not published — request a scoped quote | Varies — confirm in proposal |
| CyberSheath | Managed compliance and cybersecurity provider for the DIB | Not published — request a scoped quote | Varies — confirm in proposal |
| SecureStrux | Cybersecurity consultancy for defense and federal contractors | Not published — request a scoped quote | Varies — confirm in proposal |
| Redspin | Cybersecurity assessment firm (authorized C3PAO) | Not published — request a scoped quote | Varies — confirm in proposal |
| Sera-Brynn | Cybersecurity audit and advisory firm | Not published — request a scoped quote | Varies — confirm in proposal |
| Coalfire | Cybersecurity advisory and assessment firm (Coalfire Federal for public-sector work) | Not published — request a scoped quote | Varies — confirm in proposal |
| A-LIGN | Cybersecurity compliance and audit firm | Not published — request a scoped quote | Varies — confirm in proposal |
| Peak InfoSec | Cybersecurity consulting firm | Not published — request a scoped quote | Varies — confirm in proposal |
| CyberSecOp | Managed security and compliance consulting firm | Not published — request a scoped quote | Varies — confirm in proposal |
| Pivot Point Security | Information security consulting firm | Not published — request a scoped quote | Varies — confirm in proposal |
Planning ranges are not quotes. See our methodology for how prices are labeled and verified.
Commercial CSF programs
CSF 2.0 program design and implementation for non-regulated companies.
| Firm | Type | Planning range | Typical timeline |
|---|---|---|---|
| Sera-Brynn | Cybersecurity audit and advisory firm | Not published — request a scoped quote | Varies — confirm in proposal |
| Coalfire | Cybersecurity advisory and assessment firm (Coalfire Federal for public-sector work) | Not published — request a scoped quote | Varies — confirm in proposal |
| A-LIGN | Cybersecurity compliance and audit firm | Not published — request a scoped quote | Varies — confirm in proposal |
| GuidePoint Security | Cybersecurity consultancy with a dedicated Federal Solutions practice | Not published — request a scoped quote | Varies — confirm in proposal |
| Optiv | Cybersecurity advisory and solutions firm | Not published — request a scoped quote | Varies — confirm in proposal |
| CyberSecOp | Managed security and compliance consulting firm | Not published — request a scoped quote | Varies — confirm in proposal |
| Pivot Point Security | Information security consulting firm | Not published — request a scoped quote | Varies — confirm in proposal |
Planning ranges are not quotes. See our methodology for how prices are labeled and verified.
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