Not all technology due diligence is created equal. The partner you choose to conduct your TDD has a direct bearing on the quality of the findings, the relevance of the recommendations, and ultimately the confidence with which you can make — or walk away from — a significant investment decision.

In a market where TDD is increasingly standard practice, the choice of provider has become a meaningful differentiator. Here is how to evaluate your options — and what to look for in a partner whose assessment you can genuinely rely on.

Start With the Right Questions

Before evaluating any TDD provider, it helps to be clear about what you actually need from the engagement. Different transactions have different requirements:

• Is this an early-stage red flag assessment or a comprehensive pre-signing TDD?
• Is the target a conventional SaaS platform, a legacy system, an AI business, or a no-code platform?
• How compressed is the deal timeline?
• How technically complex is the target?
• What will the findings need to do — inform valuation, support deal structuring, or feed a post-close integration plan?

The answers to these questions define what a good TDD partner looks like for this specific transaction. A provider that excels at rapid red flag assessments for PE firms may not be the right choice for a deep, multi-product assessment of a complex enterprise software business — and vice versa.

Boutique Specialist vs. Large Process-Driven Firm

This is the most consequential choice in selecting a TDD partner — and the one that is most consistently misunderstood.

Large, well-known advisory firms offer TDD as part of a broader suite of M&A services. The appeal is consolidation: one firm handling legal, financial, commercial, and technical due diligence under one roof. The limitation is equally clear: TDD is rarely their core competency. It is a line item in a broader engagement, often staffed by generalist consultants rather than practising engineers, and delivered through a standardised process that was not designed specifically for the complexity of technology assessment.

The result, in many cases, is a TDD report that covers the expected categories but lacks the depth, the specificity, and the engineering judgment that surfaces the risks that actually matter.

Boutique TDD specialists operate differently. Technology assessment is their only business. Their teams are built from practising engineers and architects with real-world development experience — not management consultants who have trained on technology frameworks. Their methodologies are refined specifically for the M&A context. And because they are not managing a dozen parallel workstreams across a large advisory engagement, their senior people are directly involved in every assessment rather than delegated to junior staff.

The trade-off is real: a boutique specialist requires a separate engagement alongside your legal and financial advisors. But for the workstream most likely to surface the risks that move deal value, that separation is a feature, not a limitation.

The Engineering Expertise Test

One of the most reliable ways to evaluate a TDD provider is to ask a simple question: who will actually conduct the assessment?

The right answer involves named, experienced engineers with demonstrable backgrounds in software development, architecture, and security. The wrong answer involves references to a proprietary methodology, a team of consultants, or a platform that generates automated reports.

Technology due diligence is a craft. It requires judgment — the ability to look at an architectural decision and understand not just what it is, but what it implies for the acquirer’s specific plans. Automated tools are useful accelerants, but they cannot replace the expertise needed to interpret what they find or to surface the risks that do not show up in automated scans: the undocumented business logic, the key person dependency, the architectural constraint that only becomes visible when you understand the whole system.

Ask any prospective TDD partner who will be in the discovery session with the target’s engineering team. Their answer tells you everything you need to know about the depth of assessment you will receive.

AI Due Diligence Capability: The New Differentiator

As AI acquisitions become a larger proportion of technology M&A deal flow, the ability to assess AI-specific risk has become a meaningful differentiator between TDD providers.

Most conventional TDD frameworks were not built to assess AI systems. They cannot distinguish between genuine proprietary model capability and a thin wrapper around a third-party foundation model. They do not address training data provenance, AI regulatory compliance under the EU AI Act, or the specific talent concentration risks that make AI acquisitions different from conventional software acquisitions.

When evaluating a TDD partner for an AI acquisition — or any acquisition where the target has significant AI components — ask specifically about their AI assessment capability. What is their methodology for evaluating model architecture and performance? How do they assess training data compliance? What do they know about the EU AI Act and its implications for the assets you are acquiring?

A provider who gives vague answers is telling you something important about the depth of assessment you will receive.

Practical Criteria for Evaluation

When comparing TDD partners, assess against these specific criteria:

Track record and references — how many engagements have they completed? In what sectors? Can they provide references from PE firms, VCs, or strategic acquirers whose situations are similar to yours?

Team composition — are the people conducting the assessment practising engineers or management consultants? What is the seniority of the team that will be directly involved?

Methodology — is their framework structured and consistent, or does each engagement reflect the individual preferences of whoever is conducting it? Can they explain how findings are prioritised and how they translate into commercial recommendations?

Timeline and flexibility — can they work within your deal timeline, including accelerated assessments when required? Do they have a clear view of what a compressed scope covers and does not cover?

Report quality — ask to see a sample report. Does it provide actionable, commercially relevant findings — or generic observations that could apply to any technology platform?

AI and security capability — specifically for AI acquisitions or targets with significant security exposure, does the provider have demonstrated capability in these specific areas?

Why VeryDiligent

At VeryDiligent, technology due diligence is our only business. Our team is built from experienced engineers and architects with real-world development backgrounds. Our methodology is structured, consistent, and refined across 200+ engagements — covering architecture, codebase quality, security, infrastructure, engineering team, and AI-specific risk.

We work within your deal timeline. We provide transparent, fixed-fee pricing agreed upfront. And our reports are designed to be actionable — for your investment committee, your deal structuring, and your post-close value creation agenda.

Contact us today to discuss your upcoming transaction.

Related reading: In-house vs External Technology Due Diligence | Our Framework for Technology Due Diligence Explained | AI Startups Are Harder to Diligence Than You Think