Deal pressure is a constant in technology M&A. Competitive processes move fast. Sellers set tight exclusivity windows. Investment committees want certainty quickly. And in that environment, technology due diligence — thorough, code-level, expert-led TDD — can feel like the workstream most likely to slow everything down.

The instinct to compress or abbreviate the technical assessment is understandable. It is also one of the most common sources of post-close regret in technology acquisitions.

The good news is that speed and depth are not mutually exclusive — if the engagement is designed correctly from the outset.

Why Deal Pressure Creates TDD Risk

When timelines compress, something has to give. In practice, what gives is usually the technical assessment — either abbreviated in scope, delayed until late in the process, or skipped entirely in favour of a light-touch conversation with the engineering team.

Each of these decisions transfers risk from the pre-close process to the post-close balance sheet. Technical debt that was not quantified becomes a remediation programme that was not budgeted. A scalability limitation that was not assessed becomes an architectural overhaul that delays the integration. A security vulnerability that was not identified becomes a breach that triggers regulatory scrutiny.

The problem is not that acquirers are reckless. It is that deal pressure creates a cognitive bias toward completing the transaction — and TDD is the workstream most likely to surface information that complicates it.

The False Economy of a Shallow Assessment

A light-touch technical review feels like a compromise: you get some coverage, the deal stays on track, and you tell yourself you will address the gaps post-close. In practice, it rarely works that way.

Post-close, the incentive to investigate technical problems disappears. The seller is no longer at the table. The price has been paid. And the engineering team that inherited the platform is now responsible for delivering a roadmap and integrating a system while simultaneously dealing with the issues that were not surfaced during due diligence.

A shallow pre-close assessment does not reduce risk. It defers it — and deferred technical risk is almost always more expensive than discovered technical risk, because you lose the opportunity to price it, structure around it, or walk away from it.

How to Optimise for Both Speed and Depth

The solution is not to choose between speed and depth. It is to design the TDD engagement intelligently so that the most critical risk areas are covered within the available timeline, with a clear understanding of what has and has not been assessed.

Start early. The single most effective way to accelerate TDD without compromising depth is to start it earlier in the process. TDD that begins at the same time as legal and financial due diligence — rather than after — can run in parallel and finish on the same timeline. The delay is almost always caused by sequencing, not duration.

Use a tiered scope. Not everything needs to be assessed to the same depth on the same timeline. A well-designed TDD engagement identifies the highest-priority risk areas upfront — the ones most likely to affect deal value or terms — and allocates assessment effort accordingly. Lower-priority areas can be deferred to a post-close review with appropriate contractual protections in place.

Accelerated red flag assessments. Where deal timelines are genuinely compressed to less than two weeks, a focused red flag assessment — scoped tightly around the highest-risk dimensions of the target — can be delivered in five to seven business days. This is not a full TDD, and it should not be presented as one. But it surfaces the material issues that could affect the decision to proceed, within a timeline that works for the deal.

Build access requirements into the process early. One of the most common causes of TDD delay is not the assessment itself — it is waiting for access. Repository access, documentation, infrastructure credentials, and time with the engineering team all need to be agreed and scheduled before the assessment begins. Building these requirements into the term sheet or letter of intent removes the most common bottleneck.

Leverage experienced specialists. An experienced TDD team with a proven methodology knows where to look and what to prioritise. They do not need to design their process as they go. The efficiency of a specialist provider is not just about speed — it is about the quality of judgment applied to the available time.

What Should Never Be Compressed

Some elements of technology due diligence should not be abbreviated regardless of deal pressure:

Security assessment — a surface-level security review that misses a material vulnerability is worse than no review, because it creates false confidence. If timeline does not allow for a full security assessment, the risk should be explicitly acknowledged and addressed through contractual protections.

Engineering team interviews — the structured discovery session with the target’s technical team is not a nice-to-have. It surfaces information that no automated tool or documentation review can replicate. Even under pressure, it should be protected.

Report quality — findings that cannot be clearly communicated to an investment committee or used to inform deal structuring have limited value. The reporting stage should not be the one that gets compressed.

The VeryDiligent Approach to Accelerated Engagements

At VeryDiligent, we have delivered technology due diligence engagements in as little as five business days for situations where deal timelines require it — without compromising the integrity of the findings. Our structured methodology, refined across 200+ engagements, allows us to move quickly precisely because we do not have to work out the process as we go.

We work within your deal timeline. We will always be clear about what a given scope covers — and what it does not.

Contact us today to discuss how we can support your upcoming transaction, whatever the timeline.

Related reading: How Long Does a Technology Due Diligence Take? | In-house vs External Technology Due Diligence | How Technical Risk Impacts Valuation Multiples