Due Diligence ChecklistDue Diligence Checklist
Technical Due Diligence
Due Diligence Checklist

Technical Due Diligence

Technical due diligence is the process of verifying that the technical claims of a business match its reality. Whether the asset is a software platform or a commercial building, this process transforms technical assumptions into quantified risks. It is not a mere checklist of assets, but a rigorous investigation into whether the underlying infrastructure can support the business goals and valuation attached to the deal.

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In software-driven acquisitions, we see the process as a search for hidden liabilities. A product may appear functional on the surface, but the underlying code may be riddled with technical debt or dependent on outdated frameworks that hinder future growth. As noted by datarooms.org.uk, this review encompasses everything from software architecture and code quality to the maturity of the DevOps pipeline and the stability of the technical team.

The stakes of this investigation are high because technical failures often surface only after the transaction is complete.

Risk is rarely binary; it exists on a spectrum of remediability. Some issues are "red flags" that should trigger a renegotiation of the purchase price or a request for indemnities, while others are simply operational gaps to be addressed in a post-merger integration roadmap. For example, a lack of automated testing is a manageable gap, but a fundamental flaw in the data architecture that prevents scaling is a systemic risk.

When evaluating software assets, we focus on the tension between speed of delivery and sustainability. Many startups prioritise rapid feature release over architectural rigour. This creates a "debt" that the acquirer must eventually pay. We categorise these findings to provide a clear view of the investment required to stabilise the asset.

Attribute High Health Moderate Health Critical Risk
Code Quality Modular, documented, high test coverage Functional but monolithic; sparse docs Spaghetti code; no tests; high fragility
Scalability Elastic cloud infrastructure; load-balanced Vertical scaling only; manual intervention Hard limits reached; frequent outages
Security Regular audits; MFA; encrypted at rest Periodic patches; basic firewall No encryption; known unpatched CVEs
IP Status Clear ownership; SBOM maintained Mixed licenses; missing some records Contaminated by GPL; disputed ownership

Beyond the code, the human element is a primary point of failure. A company might possess a brilliant codebase, but if the knowledge of that system resides in a single "hero" developer without documentation, the asset is fragile. We examine the organisational chart to identify these key-person dependencies.

The scope of technical due diligence extends equally into the physical realm. In commercial property, the focus shifts from code to fabric and systems. According to the RICS professional standard, the process involves an adaptable framework of building surveys and condition inspections. The goal is to uncover hidden costs, such as outdated mechanical and electrical (M&E) systems or non-compliance with energy legislation.

In both digital and physical assets, the outcome is a report that converts technical findings into financial levers.

A successful process requires a secure environment for the exchange of sensitive data. We recommend the use of virtual data rooms to centralise documentation, from API specifications and software bills of materials (SBOM) to asbestos registers and fire risk assessments. This ensures that the diligence team can verify claims without compromising the security of the target's intellectual property.

Sources

More guides

Cloud Architecture Due Diligence: What to Look For
Cloud Architecture Due Diligence: What to Look For

You enter a data room only to find that the target company's cloud infrastructure is a "black box" described by a single, outdated PDF from three years ago.

Cybersecurity Due Diligence: Where to Start
Cybersecurity Due Diligence: Where to Start

A buyer typically faces a choice between a rapid, questionnaire-led review of a target company or a deep-dive technical forensic audit.

IT Due Diligence Process: What Good Looks Like
IT Due Diligence Process: What Good Looks Like

The practice of IT due diligence grew from a need to verify physical assets (servers in racks and licensed software on disks) long before the abstraction of…

M&A Technical Due Diligence: The Case for and Against
M&A Technical Due Diligence: The Case for and Against

"If the product is the primary value driver, why am I spending six figures on a technical audit when my commercial team says the numbers work?" The answer is…

Software Due Diligence Services: What the Evidence Says
Software Due Diligence Services: What the Evidence Says

The recent proliferation of agentic AI and the shift toward hyper-specialised SaaS models have transformed software from a static asset into a volatile stream…

Startup Technical Due Diligence: Costs, Risks and Returns
Startup Technical Due Diligence: Costs, Risks and Returns

Organise your virtual data room before the first inquiry arrives.

Technical Due Diligence Checklist: What Changes in Practice
Technical Due Diligence Checklist: What Changes in Practice

A technical due diligence checklist is often mistaken for a technical audit, but the two serve different masters.

Choosing IT Due Diligence Checklist
Choosing IT Due Diligence Checklist

The collapse of several high-profile fintech ventures demonstrates that a polished user interface often masks a fragmented backend of technical debt and…

Technical Due Diligence Template, Compared
Technical Due Diligence Template, Compared

Success in a technical audit depends on one precondition: you must first distinguish whether the technology is the product itself or merely the engine enabling…

A Practical Guide to Technical Risk Assessment
A Practical Guide to Technical Risk Assessment

We are not discussing the health and safety of a physical laboratory or the handling of hazardous chemicals, as these are matters of workplace compliance…

How to Evaluate Technology Assessment Report
How to Evaluate Technology Assessment Report

Assume a technology assessment report is a map of risk until the evidence proves it is a manual for scale.

What this site is for

Expert-led

Written by 3 specialist authors immersed in technical due diligence.

Applied

Written from the work rather than from a summary of the work.

Current

Reviewed and reworked as practice shifts.

Referenced

34 publishers cited across the site, each one linked.

What the guides answer

Why is continuous risk telemetry preferred over a one-time audit?

Software decays rapidly; continuous telemetry quantifies the velocity of technical decay rather than just flagging a single issue. Ongoing monitoring ensures the commercial valuation stays anchored to the actual stability of the code.

Software Due Diligence Services: What the Evidence Says
How much does technical due diligence cost at different funding stages?

A seed-stage “dipstick” audit can cost £8k-£15k, focusing on architecture and a security baseline. Series A audits rise to £15k-£30k with deeper code samples and pen testing, while Series B or pre-acquisition reviews can exceed £100k as analysis expands to full SDLC and integration risk.

Startup Technical Due Diligence: Costs, Risks and Returns
What technical issues can kill a startup deal?

Unclear IP ownership is a non-negotiable deal-breaker because the asset may not legally exist. Other fatal risks include hero dependency on a single engineer, restrictive GPL licenses, an unscalable architecture, and the absence of security testing or OWASP compliance.

Startup Technical Due Diligence: Costs, Risks and Returns
How can a startup lower the expense of a technical due diligence?

Improving data quality and organizing a “ready” virtual data room can cut adviser time by 25-35%, directly reducing professional fees. Reducing redundant follow-up questions lets the third-party team work more efficiently, lowering both visible and soft-cost shadows.

Startup Technical Due Diligence: Costs, Risks and Returns

Guides to open first

Software Due Diligence Services: What the Evidence Says

Software due diligence services employ risk telemetry, code quality scans, and AI monitoring to protect buyers from hidden technical debt and liabilities.

Startup Technical Due Diligence: Costs, Risks and Returns

Startup technical due diligence reveals cost ranges, key risks like IP ownership and hero dependency, and how rigorous audits boost valuation.

Technical Due Diligence Checklist: What Changes in Practice

Technical due diligence checklists guide investors to assess technology risk, prioritize weighted findings, and tie remediation costs to deal terms.