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Customer Assurance

Practical support for the security demands of enterprise sales—questionnaires, contracts, due diligence, and customer security reviews.

Enterprise customers don’t just want to buy what you sell—they want assurance that working with you won’t introduce security, privacy, or continuity risks to their own operations. That means questionnaires, contract clauses, due diligence calls, and increasingly formal expectations about your security posture.

For many growing companies, responding to these demands becomes a significant tax on the people who should be building product and closing deals. Customer Assurance is the practical work of meeting those demands well—so security becomes an enabler of enterprise sales rather than a blocker.

What Customer Assurance involves

We help on both sides of the customer security relationship:

Responding to enterprise demands

  • Security questionnaire response — SIG, CAIQ, customer-specific questionnaires, drafted from your management system evidence with consistent, defensible answers
  • Customer security calls — joining prospect or renewal calls as your independent security representative, or briefing your team beforehand
  • Trust pages and whitepapers — customer-facing documentation that answers common questions before they’re asked
  • Contract reviews — assessing security, privacy, and continuity clauses in customer contracts before signature

Mergers and acquisitions

  • Buy-side due diligence — independent IT and security review of acquisition targets
  • Sell-side preparation — surfacing and addressing issues in your own posture before they appear in a buyer’s data room
  • Integration planning — identifying security and compliance work needed to bring acquired systems into your existing controls environment

Reusable assets

For organisations dealing with frequent enterprise demands, we help you build infrastructure that scales:

  • A reusable answer library aligned with your management system
  • Standard contract clauses you can negotiate from
  • Trust documentation that reduces questionnaire volume
  • An evidence repository that supports both audits and customer enquiries

Who benefits

Customer Assurance support is particularly valuable for:

  • SaaS and B2B companies winning enterprise deals where security is part of evaluation
  • Organisations preparing for certification (ISO 27001, SOC 2) and wanting to use the work commercially
  • Companies in or approaching M&A on either side of a transaction
  • Businesses without a dedicated security or DPO function that nonetheless face structured customer scrutiny
  • Existing security or sales teams stretched thin and needing focused, expert help

How we work

Most Customer Assurance work is scoped tightly—a single questionnaire, a contract review, a due diligence engagement—and delivered to a defined timeline. Where the work becomes ongoing, we can structure a retainer that matches your actual volume.

We collaborate with your existing teams (sales, legal, security, leadership) rather than working in isolation. The goal is not just to answer the question in front of you but to leave you better positioned for the next one.

How it relates to our other services

Customer Assurance often sits alongside or grows out of other engagements:

  • A Virtual CISO engagement may include all of these activities as part of a broader security leadership role
  • ISO 27001 implementation provides much of the evidence base that good Customer Assurance work draws on
  • GDPR work supports the privacy-specific questions enterprise customers increasingly ask

What to expect

A single questionnaire response or contract review is usually a few days of focused work. M&A due diligence is scoped to the transaction. Ongoing support is structured as a retainer.

We’ll propose a sensible structure after understanding the specific demand you’re responding to.

Common questions

Can you complete security questionnaires on our behalf?
Yes. We can prepare responses to standard security questionnaires (SIG, CAIQ, customer-specific) on your behalf, drawing on documented evidence from your management system. Where answers don't yet exist, we'll flag what needs to be true and help you decide whether to remediate or qualify the response. For frequent enquirers, we can also help you build a reusable answer library to make future questionnaires faster.
Will you join sales or customer security calls with us?
Yes—we can join prospect or customer security calls as your security representative, either openly as your independent advisor or in a more behind-the-scenes briefing role. This is particularly useful for early-stage companies winning enterprise deals where security is part of the evaluation.
Can you help us review customer contracts for security and data clauses?
Yes. We review customer and vendor contracts for security, privacy, and continuity obligations—identifying clauses you can meet, clauses that need negotiation, and obligations that might create operational risk. We work with your legal team rather than replacing them, focusing on the technical and operational reality behind the contract language.
Do you produce security whitepapers and trust documentation?
Yes. We help organisations create customer-facing security documentation—trust pages, security whitepapers, SOC 2 / ISO 27001 marketing collateral, breach notification protocols—that answers the questions enterprise buyers ask without revealing more than is appropriate. Done well, this material can reduce questionnaire volume substantially.
Can you support M&A IT and security due diligence?
Yes, on both sides of the transaction. For acquirers, we conduct security and compliance due diligence on target companies—identifying risks, integration considerations, and red flags. For sellers, we help you prepare for buyer scrutiny by surfacing and addressing issues before they appear in a data room.
How is this different from a Virtual CISO engagement?
Customer Assurance work is typically focused and transactional—a questionnaire, a contract review, a due diligence engagement, a customer call. A [Virtual CISO](/services/vciso/) is a continuous strategic role that may include all of these activities and more. Many organisations start with one-off Customer Assurance support and graduate to a VCISO retainer as enterprise demands grow.

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