How to Use This Cloud Security Resource

Cloud Security Authority functions as a structured reference directory for the US cloud security services sector — mapping provider categories, qualification standards, regulatory frameworks, and service models that define this market. The resource is organized for service seekers, procurement professionals, compliance officers, and researchers who need to navigate the cloud security landscape with precision rather than general orientation. Coverage spans the full provider ecosystem, from managed security service providers to specialized assessors operating under frameworks like NIST SP 800-145 and FedRAMP. Understanding how this resource is structured helps locate relevant information without unnecessary friction.

How to navigate

The directory is organized around provider types and service categories rather than alphabetical or geographic ordering. The starting point for most users is the Cloud Security Listings section, which presents the full provider index segmented by functional category.

Navigation follows a top-down structure:

1. Identify the service category — Determine whether the requirement falls under continuous monitoring, posture management, access brokering, audit and assessment, or architecture consulting. These distinctions carry regulatory significance; FedRAMP, for example, imposes distinct requirements on cloud service providers versus assessors, with Third Party Assessment Organizations (3PAOs) accredited separately through the American Association for Labs Accreditation (A2LA) or the NVLAP program.
2. Filter by regulatory alignment — Organizations subject to HIPAA (45 CFR §164.312), FedRAMP (OMB M-11-30), or the NIST Cybersecurity Framework have materially different provider requirements than commercial entities operating only under SOC 2 expectations.
3. Cross-reference the standards body — Each listing category references the governing standards body, whether NIST, the Cloud Security Alliance (CSA), or the Center for Internet Security (CIS).
4. Evaluate scope boundaries — Distinguish between providers that perform assessments (point-in-time) and those that deliver continuous monitoring (ongoing). This distinction affects both contract structure and compliance posture.

The directory purpose and scope page provides the authoritative statement of what categories are included and excluded from the index.

What to look for first

Qualification and accreditation signals are the first filtering criteria for any serious evaluation. In the cloud security sector, relevant credentialing structures include:

• FedRAMP Authorization status — Confirmed through the FedRAMP Marketplace, which lists Authorized, In Process, and Ready designations for cloud service offerings (CSOs).
• 3PAO accreditation — Required for any assessor conducting FedRAMP assessments; accreditation is granted through A2LA or NVLAP.
• SOC 2 Type II attestation — A baseline commercial-sector indicator that a provider's security controls have been audited by a licensed CPA firm under AICPA standards over a minimum 6-month observation period.
• ISO/IEC 27017 certification — Provides cloud-specific control guidance layered on top of ISO/IEC 27001, relevant for organizations operating in international or multi-cloud environments.
• CSA STAR certification — The Cloud Security Alliance's Security, Trust, Assurance, and Risk (STAR) registry offers three levels of assurance, from self-assessment at Level 1 to continuous monitoring at Level 3.

The contrast between FedRAMP Authorization and SOC 2 attestation is operationally significant: FedRAMP is a federal mandate for government-facing cloud services and carries legal force under the FedRAMP Authorization Act; SOC 2 is a voluntary commercial attestation with no statutory enforcement mechanism.

How information is organized

Listings within Cloud Security Authority follow a classification structure built around 4 primary provider categories drawn from the service landscape:

1. Managed Security Service Providers (MSSPs) — Deliver continuous monitoring, threat detection, and incident response for cloud environments on a subscription basis.
2. Cloud Security Posture Management (CSPM) vendors — Specialize in automated identification of cloud misconfigurations, policy compliance drift, and remediation workflows.
3. Cloud Access Security Brokers (CASBs) — Sit between end users and cloud service providers to enforce security policies, governed in part by NIST SP 800-210 guidance on access control for cloud systems.
4. Specialized consultancies and assessors — Conduct audits, penetration testing, architecture reviews, and regulatory readiness assessments on a project basis, including formal FedRAMP 3PAO engagements.

Within each category, entries are annotated with applicable regulatory frameworks, accreditation status where publicly verifiable, and service model (IaaS-focused, SaaS-focused, or multi-cloud). The NIST SP 800-144 guidance on security and privacy in public cloud computing informs the framing of shared responsibility delineations across listings.

Regulatory references appear inline with listings rather than in a separate appendix. Standards bodies cited include NIST, CSA, CIS, AICPA, and the General Services Administration (GSA) for FedRAMP-relevant entries.

Limitations and scope

This resource covers the US national cloud security services market. Listings reflect publicly available information about provider offerings, accreditations, and regulatory alignment — the directory does not independently audit, endorse, or certify any listed entity.

Geographic scope is national. State-level regulatory variation — such as the California Consumer Privacy Act (CCPA) under California Civil Code §1798.100 or the New York SHIELD Act — is noted in regulatory context sections but does not drive the primary classification structure.

The directory does not cover on-premises security vendors except where a provider offers a hybrid cloud security model with documented cloud components. Physical security controls, network perimeter hardware, and endpoint detection products outside cloud deployment contexts are excluded. Incident response retainer services are included only when the provider's primary practice is cloud-environment specific.

Entries are subject to the inherent limitation that licensing, accreditation, and certification statuses change; any compliance-critical verification should be confirmed directly against the FedRAMP Marketplace, the A2LA directory, or the CSA STAR registry at the time of procurement.