Skip to main content
Cyber Risk Council
Category: Third-Party & Supply Chain Risk

Consensus Assessments Initiative Questionnaire

Also known as: CAIQ, CSA CAIQ, Consensus Assessment Initiative Questionnaire
Simply put

The CAIQ is a standardized questionnaire created by the Cloud Security Alliance (CSA) that cloud service providers use to document the security controls they have in place. It is often a downloadable spreadsheet of yes-or-no questions that helps customers and auditors understand and assess a provider's security posture. It gives buyers a consistent way to evaluate different cloud vendors against a common set of questions.

Formal definition

The CAIQ is a standardized security and vendor assessment questionnaire developed by the Cloud Security Alliance to document and evaluate the security controls of cloud service providers. Typically structured as a spreadsheet of yes/no control assertions, it allows providers to attest to which security controls exist within their cloud offering and enables customers and auditors to assess a provider's security aptitude in a consistent, comparable format. In practice, a CAIQ documents self-reported control existence rather than independently verifying implementation; a completed CAIQ supports vendor due diligence and risk assessment but does not by itself constitute certification or third-party audit assurance.

Why it matters

For organizations moving workloads and data into cloud environments, evaluating the security posture of a cloud service provider is a core part of vendor due diligence. Without a common frame of reference, buyers often have to interpret each provider's marketing claims, custom security documentation, and inconsistent answers to bespoke questionnaires. The CAIQ addresses this by giving customers and auditors a standardized set of questions against which providers can be compared, which can meaningfully reduce the friction and inconsistency of assessing multiple vendors.

The value of a CAIQ depends heavily on understanding what it does and does not represent. A completed CAIQ is a self-reported attestation: the provider indicates which controls exist within its offering, but the questionnaire itself does not independently verify that those controls are implemented or operating effectively. It is not a certification, nor is it equivalent to a third-party audit such as a SOC 2 examination or an ISO 27001 certification. Treating a completed CAIQ as proof of a strong security posture, rather than as a starting point for further inquiry, is a common mistake that experienced security leaders will correct.

Used appropriately, the CAIQ supports risk-based decision making. Security leaders can use it to identify gaps, flag control areas that warrant follow-up evidence, and structure conversations with providers about shared responsibility. Its usefulness in any given engagement depends on the maturity of the buyer's vendor risk process, the honesty and completeness of the provider's responses, and whether the buyer follows up on the areas where self-attestation alone is insufficient.

Who it's relevant to

Cloud service providers
Providers use the CAIQ to document the security controls that exist within their cloud offerings in a standardized, industry-recognized format. Completing a CAIQ can streamline responses to repetitive customer security questionnaires, though providers should be clear that a CAIQ is a self-attestation and does not by itself substitute for independent certification or audit.
Cloud buyers and vendor risk teams
Organizations evaluating cloud vendors use the CAIQ to assess and compare providers against a consistent set of questions as part of due diligence. Its value depends on the maturity of the buyer's vendor risk process and on following up on self-reported answers with supporting evidence where deeper assurance is needed.
Auditors and assessors
Auditors use the CAIQ to assess the security aptitude of service providers within a standardized structure. It provides a useful starting point for evaluation, but assessors should treat it as documentation of self-reported control existence rather than as independent verification of implementation.
Virtual and fractional CISOs
In advising client organizations, a virtual or fractional CISO may use the CAIQ to structure cloud vendor assessments and frame conversations about shared responsibility and control gaps. The vCISO typically directs and interprets this process, while accountability for accepting a given vendor's risk generally remains with the client organization and its officers unless a contract specifies otherwise.

Inside CAIQ

Standardized Assessment Questions
The CAIQ is a set of yes/no and descriptive questions published by the Cloud Security Alliance that allows organizations to document the security controls present in a cloud offering. It is structured to let a cloud consumer evaluate a provider's security posture in a consistent format.
Alignment with the Cloud Controls Matrix (CCM)
The CAIQ maps to the CSA Cloud Controls Matrix, a control framework organized into security domains. The questionnaire operationalizes the CCM controls as questions, so responses can be traced back to specific control objectives across areas such as governance, identity and access management, and data security.
Provider Self-Assessment Format
The CAIQ is typically completed by a cloud service provider as a self-attestation of implemented controls. It documents what the provider claims to have in place rather than independently verifying those claims, and it is often shared during vendor due diligence.
Vendor Due Diligence Artifact
In many engagements the CAIQ serves as an input to third-party risk assessments, helping a buyer's team compare providers and identify gaps or areas warranting deeper questions before contracting.

Common questions

Answers to the questions practitioners most commonly ask about CAIQ.

Does completing a CAIQ mean a cloud provider is certified or independently verified as secure?
No. The CAIQ is a self-assessment questionnaire in which a provider documents its own security and control practices against the Cloud Security Alliance's Cloud Controls Matrix. Completing it does not constitute certification, and the responses are typically self-reported unless subjected to independent audit or attestation. A CAIQ can support due diligence and readiness discussions, but treating it as equivalent to a third-party validated certification is a common mistake an expert would correct. Buyers should distinguish between self-attested CAIQ responses and independently verified assurances such as SOC 2 reports or ISO 27001 certification.
Can a virtual CISO simply fill out or approve a CAIQ and thereby take on accountability for the answers?
A virtual CISO often advises on how to interpret CAIQ questions, structure responses, and align them with an organization's actual controls, but this is a governance and guidance role rather than an assumption of accountability. The accuracy of self-reported answers, and the legal and organizational accountability for the security posture they describe, typically remains with the client organization and its officers. Whether a vCISO reviews, drafts, or signs off on CAIQ content may vary by engagement and contract, and doing so does not transfer liability unless a contract specifies otherwise.
How does a virtual CISO typically help an organization complete a CAIQ?
In many engagements, a virtual CISO supports CAIQ completion by mapping questionnaire items to the organization's existing controls, identifying gaps between claimed and actual practices, and advising on how to phrase responses accurately. This is generally strategic and governance-oriented work rather than hands-on control implementation. The value often depends on organizational maturity, access to relevant stakeholders and documentation, and the client's willingness to disclose true control states rather than aspirational ones.
When is it appropriate to use a CAIQ during a vendor assessment process?
A CAIQ is often used early in vendor due diligence to gather a standardized, self-reported view of a provider's security controls before deeper evaluation. It can help streamline questionnaires and reduce redundant back-and-forth. However, it is typically most useful as a starting point rather than a conclusion, and organizations frequently pair it with independent evidence such as audit reports, penetration test summaries, or contractual security commitments. The appropriate use may vary by the sensitivity of the data involved and the organization's risk tolerance.
How should an organization verify the answers provided in a supplier's CAIQ?
Because CAIQ responses are typically self-reported, verification generally involves requesting supporting evidence for material claims, such as independent audit attestations, policy documentation, or configuration records. A virtual CISO often advises on which responses warrant scrutiny based on the risk profile of the engagement, and on how to reconcile CAIQ answers with other assurance artifacts. Verification depth may vary by provider and by the criticality of the service being assessed.
How does the CAIQ relate to other frameworks and reports an organization may already use?
The CAIQ is built on the Cloud Security Alliance's Cloud Controls Matrix, which is designed to map to and cross-reference other frameworks and standards. This can help organizations relate CAIQ responses to controls they track under frameworks such as NIST CSF or ISO 27001. A virtual CISO can help interpret these mappings, but supporting alignment or readiness through a CAIQ is not the same as asserting compliance or certification under any particular standard, and the strength of any mapping may vary by how controls are actually implemented.

Common misconceptions

A completed CAIQ is a certification or independent audit of a provider's security.
The CAIQ is typically a self-assessment completed by the provider and generally does not, on its own, constitute independent verification. It should be distinguished from third-party audit reports such as SOC 2 or certifications such as ISO 27001, which involve external examination. A vCISO advising on vendor risk would treat the CAIQ as one data point that supports readiness understanding, not as proof of compliance or certification.
Reviewing a vendor's CAIQ is an operational task a virtual CISO performs hands-on for the organization.
Evaluating a CAIQ falls within the governance and risk-management advisory scope typical of a vCISO engagement, but the accountability for accepting a vendor's risk usually remains with the client organization and its officers. A vCISO advises and directs the assessment approach; hands-on collection, negotiation, or ongoing vendor monitoring may be out of scope unless explicitly contracted.
A satisfactory CAIQ means the provider's controls are effective and no further review is needed.
The CAIQ documents claimed controls but does not by itself demonstrate operating effectiveness. The value of a CAIQ review depends on organizational maturity, the accuracy of the provider's responses, and follow-up validation. It often needs to be supplemented with evidence, audit reports, and direct stakeholder questions.

Best practices

Treat the CAIQ as a starting point for vendor due diligence rather than a conclusion, and corroborate significant responses with independent evidence such as audit reports or certifications where available.
Map CAIQ responses back to the corresponding Cloud Controls Matrix domains to ensure coverage of the control areas most relevant to your organization's risk profile and data sensitivity.
Confirm the date and version of the CAIQ and CCM referenced, since responses may reflect a point in time and may vary as the provider's environment changes.
Clarify in the engagement scope who reviews the CAIQ, who follows up on gaps, and that accountability for accepting vendor risk remains with the client's officers.
Use CAIQ gaps to drive targeted follow-up questions and contractual requirements rather than accepting yes/no answers at face value.
Document how CAIQ findings feed into the organization's broader third-party risk and governance processes so decisions are traceable and repeatable.