Customer Security Reviews

Prove Your Security to Customers

Answer security questionnaires with evidence, not promises, and keep deals moving. Independent testing and audit readiness by CISA-certified auditors, scoped to what your customers ask for.

Every Answer Backed by a Document

This is what a security questionnaire looks like after working with us: each answer points to independent evidence your buyer can check, so the review stops going back and forth.

Vendor Security Questionnaire Example
NumberQuestionAnswerEvidence attached
1. When was your last independent penetration test? Within the past 12 months Penetration test report
2. Which security framework does your program follow? NIST CSF 2.0 NIST CSF 2.0 maturity score
3. Has an independent auditor reviewed your security controls? Yes Auditor Opinion Letter
4. Is your application tested against the OWASP Top 10? Yes Web application audit report
4 of 4 answers backed by independent evidence

Why Security Reviews Stall Deals

Before they sign, customers increasingly send long security questionnaires, ask which security framework you follow, or want a recent penetration test. Without independent evidence, answering takes weeks, depends on a few busy people, and still leaves buyers unsure. The deal waits while security and sales go back and forth.

Hands typing on a laptop with a spreadsheet open, the kind of security questionnaire customers send vendors

Where We Fit

We are independent, certified auditors. We test your applications and infrastructure, assess your program against NIST CSF 2.0 and ISO 27001, and give you documents you can share, so your team spends less time on questionnaires and more time closing.

Built for situations like yours

  • SaaS and software companies selling to enterprises
  • Vendors facing customer security questionnaires
  • Companies asked to show a recognized security framework
  • Service providers that handle client data
  • Businesses entering regulated markets
Questionnaire on your desk right now? Send it to a certified auditor, and we will tell you which answers need independent evidence.
Talk to an Auditor or call (714) 794-5210

Services That Answer Customer Security Reviews

Pick by the question that stalls your deals. A recent penetration test answers most testing questions; an assessment or opinion letter answers the framework questions.

Common starting point

Web Application Security Audit

Most questionnaires ask about your application first. We test it for OWASP Top 10 flaws, authentication and access control weaknesses, and data exposure, and document the results in a report you can reference.

Web app security audit

Penetration Test

A black box penetration test simulates a real-world attack on your perimeter, the way customers expect an independent tester to. It answers the question of when your last penetration test was with a dated, independent report.

Penetration test

Auditor Opinion Letter & Secure Seal

As Certified Information Systems Auditors, we are authorized to issue formal audit opinions. Our Auditor Opinion Letter and Secure Seal show clients and prospects that an independent auditor has tested your controls, without sending full technical reports.

Auditor Opinion Letter

NIST CSF 2.0 Maturity Assessment

NIST CSF is the framework outside parties most often ask about. Our Reviewed Assessment, built for customer questionnaires, has a certified auditor review the evidence behind all 106 CSF 2.0 subcategories. Need more? Our full audit ends with an independent opinion that is ours, not yours.

NIST CSF assessment

ISO 27001 & Compliance Audits

An independent ISO 27001 internal audit that satisfies clause 9.2, plus assessments against HIPAA, the GLBA Safeguards Rule, and NY DFS. When a customer specifically requires SOC 2, we handle the readiness work with our CPA partners.

Compliance audit

vCISO Advisory

A vCISO supports your client and prospect security questionnaire responses and leads your compliance program for frameworks such as NIST CSF, NIST 800-171, CMMC, and ISO 27001, on a fractional basis.

vCISO advisory

Evidence Your Sales Team Can Use

A startup facing its first enterprise questionnaire and a mature vendor with years of audits behind it need very different things. We do not sell a fixed package. We start with what your customers are asking for, test what you actually run, and deliver evidence your sales team can use.

Scoped to Your Buyers’ Requests

We start from the questionnaires, contract terms, and frameworks your customers reference, and focus on what will move the deal.

Mapped to the Frameworks They Use

Findings tied to NIST CSF, ISO 27001, and the other standards your customers name, so your answers point to independent evidence.

Shareable Without Oversharing

An Auditor Opinion Letter and Secure Seal tell prospects you were independently tested, without sending them your full technical report.

Customer Security Review Services

How We Help You Pass Customer Security Reviews

Security has become part of the buying process. Enterprise customers, partners, and regulators want proof that the vendors they rely on protect data properly, and a slow or vague answer can stall a deal or lose it. Our role is to find and fix the weaknesses buyers would worry about, and to give you independent documentation that answers their questions with evidence. Our Auditor Opinion Letter is often the first thing sales teams share.

From Questionnaire to Evidence

We start with the questionnaires and contract terms in front of you and group the questions by the evidence that answers them. A web application audit or penetration test covers the testing questions, a NIST CSF 2.0 or ISO 27001 assessment covers the framework questions, and an Auditor Opinion Letter gives sales something to send without pulling an engineer into every review. Findings are risk-rated with clear fixes, so the next questionnaire can show proof of remediation too. Our support continues for three months after delivery.

Which Service Should You Start With?

Most organizations begin with one engagement and build from there. Find the situation closest to yours:

Not sure? A free consultation will help you decide.

Why Choose Altius IT for Customer Security Reviews

Altius IT has performed independent security audits for over 30 years. Our CISA-certified auditors are certified to issue formal audit opinions, which gives your evidence weight with the security and procurement teams reviewing it. We tailor every engagement to your product, your customers, and your timeline.

Customer Security Reviews, Explained

NIST CSF 2.0 is the framework outside parties most often ask about, which makes a NIST CSF 2.0 maturity assessment a strong place to start: a certified auditor reviews your evidence for all 106 subcategories. If a customer specifically requires a SOC 2 report, we handle the readiness work and our CPA partners issue the report.

It is a letter from Altius IT’s Certified Information Systems Auditors documenting the results of your audit. Together with the Secure Seal, it lets clients and prospects know you are secure without sharing your full technical report. Learn more about the Auditor Opinion Letter.

Yes. Our vCISO service includes support for client and prospect security questionnaire responses. Just as important, our testing and audits give you independent evidence to point to, so your answers are faster and more convincing.

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