Top 10 Best Cybersecurity Rating Services of 2026

EY’s core delivery emphasizes evidence-based assessment and repeatable security posture scoring that can be used across business units. Rating outputs are packaged for continuous monitoring conversations through clear attribution of external indicators and control evidence, rather than only a single point-in-time score. Admin and governance controls are geared toward structured reviews, stakeholder sign-off, and consistent methodology application across programs.

A tradeoff is that deep configuration and governance overhead can be higher than automated consumer-style platforms, because rating methodology alignment and evidence workflows need active project management. EY fits best when security teams need enterprise reporting depth for risk committees and when third-party risk programs must translate rating results into actionable evidence requests.

BSI is typically used by enterprises that must quantify supplier cyber risk and translate external security posture signals into consistent vendor decisions. Ratings are supported by an evidence collection and methodology layer that reduces reliance on self-reported questionnaire answers alone. Continuous updates help teams track changes over time for internet-facing assets and monitored third parties. Integration and automation are designed for organizations that want rating data flowing into risk workflows instead of staying in dashboards.

A practical tradeoff is that deeper integration and higher governance maturity rely on deliberate setup of rating intake sources, stakeholder ownership, and review cadence. BSI fits scenarios where vendor relationships are large enough to justify automation, and where security, procurement, and risk teams need a repeatable process for rating-to-action decisions.

Marsh delivers cyber risk quantification outputs intended for ongoing vendor evaluation and enterprise exposure management workflows. The service emphasizes methodology consistency across repeated assessments and the ability to align rating outputs to internal stakeholder needs like procurement and risk owners. Marsh also supports rating-driven evidence collection to reduce manual questionnaire chasing during third-party reviews.

A tradeoff is that rating coverage and evidence depth depend on which data streams and artifacts are available for each reviewed organization. Marsh fits best when an enterprise has an established third-party risk intake process and needs repeatable rating handling for large vendor portfolios.

PwC brings a consulting-led approach to cybersecurity rating services, combining external exposure perspectives with audit-grade evidence practices used in enterprise engagements. Its core capability centers on translating rating methodology into governance-ready risk narratives for leadership and for third-party risk management.

PwC also supports evidence collection workflows that align security questionnaire demands with internally controlled artifacts. The service is most effective when rating outputs are treated as inputs to remediation planning, not as a standalone score.

KPMG delivers cybersecurity rating services that translate third-party security evidence into structured cyber risk outputs for enterprise vendor and portfolio decisions. Delivery emphasizes questionnaire handling and evidence-based assessment workflows used in third-party risk management, rather than purely automated internet-facing asset scoring.

Engagements typically combine rating methodology design with governance around rating drivers, remediation narratives, and audit-ready documentation. KPMG also supports integration of rating outputs into broader risk and compliance processes used alongside SIG-style security questionnaires and control frameworks.

Aon brings cybersecurity rating services together with enterprise third-party risk workflows, especially for regulated and global organizations.

Its core value sits in rating methodology alignment, evidence-based review support, and recurring vendor risk evaluation across broad external ecosystems.

Aon also supports questionnaire operations and risk scoring outputs that can feed procurement decisions and risk reporting processes.

Delivery emphasis is on governance and repeatability rather than ad-hoc scoring for isolated assets.

GuidePoint Security delivers cybersecurity ratings work through an evidence-heavy service workflow tied to third-party risk programs. The offering is built around analyst-led review of vendor-facing security posture evidence, not only automated scoring.

It supports engagement-driven ratings that plug into broader vendor risk and external attack surface governance processes. Teams typically use it to standardize questionnaire evidence, map it to a rating methodology, and maintain audit-ready documentation trails.

RSM is a cybersecurity rating service provider that focuses on enterprise risk outcomes from third-party security evidence and scoring workflows. Its rating process concentrates on standardized evidence collection and mapped scoring inputs to produce consistent vendor risk signals for internal governance.

RSM also supports questionnaire-driven engagements where customers need traceable security posture evidence feeding risk decisions. The service approach emphasizes controlled delivery for rating programs rather than self-serve scoring experiments.

NCC Group performs third-party security rating and cyber risk quantification with a documented methodology built around evidence collected from an external attack surface. The offering typically supports continuous monitoring and validation workflows used for cyber risk management and security posture assessment of internet-facing assets.

Its delivery model is centered on analyst-led assessment and structured reporting that fits vendor risk assessment and enterprise risk reporting cycles. Integration depth is strongest when internal teams already run security questionnaires and evidence gathering for external validation.

Kroll delivers cybersecurity rating and third-party risk outputs that integrate into enterprise vendor risk workflows through report generation and evidence handling. The service is built around Kroll's investigative and due-diligence operations, which makes it more document- and process-oriented than purely automated external-scoring vendors.

It supports structured assessments for organizations evaluating suppliers and exposed entities, with output formats designed for risk committees and questionnaire-style review. Kroll is best evaluated on how its rating methodology, evidence requests, and report production fit into an existing governance process.