A practitioner’s guide to cybersecurity vendor due diligence

Discover the company behind the demo.

A product can perform beautifully in a proof of concept. Can the company behind it deliver, support, and earn your trust over time?

The Vendor Trust Framework gives CISOs, procurement teams, legal teams, and business leaders a structured way to investigate the risks a demo cannot show.

Eric ThompsonBlacksilver PressFirst edition · 2026
Cover of The Vendor Trust Framework by Eric Thompson, with a luminous network forming a shield
“Verification is not the opposite of trust. Verification is what makes trust possible.”

— From The Vendor Trust Framework

The framework

Nine dimensions of vendor trust

Evaluate the legal entity, the product, and the organization you will depend on after the contract is signed. Each pillar asks a different question; together they reveal patterns that a feature comparison can miss.

PILLAR 01

Corporate Legitimacy

Is this company legally real?

PILLAR 02

Financial Viability

Will they survive long enough to support you?

PILLAR 03

Product Claim Validation

Can they prove what they claim?

PILLAR 04

Security and Compliance Maturity

Do they secure themselves?

PILLAR 05

Engineering Discipline

Is the product built responsibly?

PILLAR 06

Support and Operational Readiness

Can they support you during an incident?

PILLAR 07

Data Governance & Ownership

Can you trust them with your data and leave?

PILLAR 08

Ethical Transparency

How do they behave when no one is watching?

PILLAR 09

Leadership Maturity and Organizational Candor

Can leadership separate vision from reality?

Inside the book

From first look to informed decision.

The book is designed for use before onboarding, during a proof of concept, before contract signature, and at renewal. It treats evidence, inconsistencies, and a vendor’s response to scrutiny as part of the assessment.

  • Questions and evidence to examine across nine pillars
  • A 30/90 Minute Focus Guide for a first pass
  • A due diligence checklist and assessment flag summary
  • Guidance for early-stage vendors, integrators, and resellers
  • Industry compliance references and a role-based guide

The author

Eric Thompson

Eric has spent more than twenty-five years working with technology vendors, customers, and security teams. He has evaluated products as an engineer, signed contracts as a customer, lived with the consequences as a practitioner, and helped organizations make those decisions from the vendor side.

Those experiences shaped a simple conviction: organizations should investigate the companies behind critical technology with the same care they bring to evaluating the technology itself.

More about Eric ↗

Get the book

The Vendor Trust Framework

Published by Blacksilver Press. Get the e-book from Amazon or Barnes & Noble, or order the trade paperback direct at a special price.