For investors.
Technology due diligence across European borders, with the same rigour you apply to financial and commercial assessment.
Technology Advisory Across the Investment Lifecycle
Pre-Deal Due Diligence
Comprehensive technology assessment that informs term sheets and investment committee papers. Delivered in two to six weeks by senior operators with direct experience across European markets and regulatory frameworks.
Hold-Period Oversight
Periodic audits and fractional CTO placement that protect and enhance technology value through the hold period, from Dublin to Stockholm, London to Milan.
Portfolio Technology Advisory
Ongoing advisory across multiple portfolio companies in different jurisdictions, providing a consistent technology perspective calibrated to the realities of cross-border European investment.
The Cost of Getting Technology Wrong
Across more than a hundred technology assessments for PE and VC investors operating in the UK and across Europe, we find material technology risk in the majority of deals: undisclosed technical debt requiring millions in remediation, CTOs misrepresenting platform capability, teams that look impressive on paper but have built something that needs rewriting within eighteen months. These are not edge cases. They recur across every jurisdiction and every sector.
The question is never whether risk exists, but whether you understand it well enough to price it, plan for it, and manage it. Cross-border deals add a further layer: regulatory divergence, varying employment law, data residency obligations, and cultural differences in how technology teams operate. Our assessors are practising CTOs who have built and scaled systems across European markets, which means they identify risks that non-practitioners consistently miss.
What Makes Us Different from the Alternatives
Operators, Not Analysts
We have assessed technology organisations across the UK and Europe. Our assessments are conducted by senior partners who have been CTOs themselves. They have managed teams, owned budgets, and answered to boards in multiple European jurisdictions. When they assess a technology organisation, they pattern-match against decades of direct experience. This operational depth surfaces the risks that actually affect investment returns: organisational dysfunction, architecture that will not scale, key-person dependencies, and the gap between what the CTO presents and what the codebase reveals.
Whether the team calls their assessment an IT Due Diligence, an audit IT, or an audit tecnologico, the question is the same: is this technology fit for the investment thesis?
DD That Turns Into Operational Value
Our due diligence clients frequently engage us for fractional CTO support afterwards. The partner who conducted the DD already understands the technology, the team, and the risks, so they move from assessment to action without a ramp-up period. For investors managing portfolio companies across borders, this continuity is particularly valuable.
One health technology deal illustrates this: our assessor identified significant gaps between how the technology was presented and its actual state. That assessment led directly to action. We stepped in as fractional CTO, rebuilt the delivery capability, and recruited a permanent replacement.
“You cannot assess what you have not built. Our assessors have sat in the chair, managed the team, owned the budget, and answered to the board. When they assess a technology organisation, they are pattern-matching against decades of direct experience.”
Speed Without Cutting Corners
PE deals move fast, regardless of jurisdiction. After a hundred-plus assessments, we know which questions to ask, how to ask them, and where material risks hide at different company stages. We deliver focused due diligence in two to three weeks when deal timelines demand it, with conversation-based outputs for auction situations where a formal report would arrive too late.
Cross-Border Regulatory Fluency
European technology companies operate under regulatory frameworks that vary materially from one jurisdiction to the next. We understand the regulatory landscape that shapes European technology companies, from BaFin to AMF to CONSOB to the FCA, AFM, FSMA, and Finansinspektionen. We assess DSGVO and RGPD obligations as fluently as UK GDPR, and we navigate local employment law, contractor classification, and sector-specific requirements as first-hand practitioners, not by consulting a reference guide.
For investors acquiring companies across European borders, understanding whether a target is genuinely compliant or running on borrowed time is not a minor detail. It affects the deal structure, the integration plan, and the exit thesis. For a deeper look at the regulatory and cultural dimensions of cross-border deals, see our cross-border technology due diligence service.
Based on more than a hundred technology assessments, we identify the critical risks that impact investment returns
Technology Foundations
Architecture, infrastructure, and technical debt that affects scalability.
Team Capability
Skills, structure, and key person dependencies that impact execution across distributed European teams.
Security & Compliance
Vulnerabilities, data protection, and regulatory readiness across European frameworks including GDPR, DSGVO, and RGPD.
Commercial Technology
Differentiators, IP, and technology moat that drives valuation.
Patterns from a Hundred Assessments
Across our body of work in UK and European technology companies, certain patterns recur with enough frequency to be instructive for investors evaluating technology risk.
Architecture decisions that block scaling appear in more than half of assessments. Structural choices made when the company was smaller now constrain growth. Always fixable, but the time and cost should be reflected in deal models.
Key-person dependencies appear in nearly every assessment. Sometimes a single engineer wrote the entire backend; sometimes the CTO has documented nothing. In smaller European technology businesses, particularly those built around a founding technical team, this concentration of knowledge is more pronounced than investors typically expect.
Regulatory compliance gaps vary by jurisdiction but appear consistently. GDPR obligations not properly implemented, financial services requirements not fully understood, local employment law creating unrecognised liability. These are not abstract risks; they materialise at exit when buyers discover them.
Overinvestment in headcount, underinvestment in process. Large teams that ship slowly because the processes, tooling, and architecture to make people productive were never built. It looks like a capacity problem, so the company hires more, compounding the issue.
For a detailed look at the ground we cover, see what we assess in a tech DD and our technology due diligence checklist.
The AI Question
Investors ask about AI in every deal. The reality for most portfolio companies is far from what public markets suggest is possible. We believe AI will create more software and more distributed development capability, but it will not eliminate engineering roles. The companies best positioned to benefit are those building teams that can rapidly iterate on AI-driven functionality, not chase whatever is trending this quarter.
For investors, the practical questions are: Does this company have a credible AI strategy tied to commercial outcomes? Does the team have the capability to execute? Is the data foundation in place? And is the governance framework sound, particularly as the EU AI Act introduces new obligations for high-risk systems? We offer AI readiness assessments that evaluate actual capability against practical opportunity, cutting through the noise. For portfolio companies ready to act, our AI bootcamp transforms engineering teams in two days. For a detailed guide to what good AI assessment covers, see our piece on AI due diligence.
Three Service Tiers Across the Investment Lifecycle
Pre-Deal Due Diligence
Comprehensive technology assessment before investment commitment. We evaluate across all five pillars, identify material risks, quantify remediation costs in EUR, and provide a clear-eyed view for term sheets and investment committee papers. The output is calibrated for investors: strategic framing, investment implications, and actionable recommendations, not a technical inventory. Findings include explicit commentary on regulatory posture across relevant European jurisdictions.
Hold-Period Audits
Periodic technology health checks on portfolio companies, typically two to three weeks, giving investors visibility into how the technology function performs against the value creation plan. We track progress on DD recommendations, identify new risks, and flag emerging issues. Many investors commission annual audits across their portfolio for a consistent view of technology risk, regardless of where each company is domiciled.
Portfolio Technology Oversight
Ongoing advisory across multiple portfolio companies. We provide regular reporting, attend quarterly board meetings, and serve as the fund's European technology advisor: available to assess new deals, review strategies, and flag risks across the portfolio. This works well for firms building a cross-border European portfolio who want consistent technology oversight without placing a fractional CTO in each company.
Our investor services
Cross-Border European Deals and Portfolio Companies
For Private Equity
Technology risk assessment, value creation planning, and portfolio optimisation for PE firms acquiring and managing technology assets across European jurisdictions.
Venture-Stage Companies Across Europe
For Venture Capital
Stage-appropriate technical assessment and ongoing portfolio support for VC firms backing founders across the UK and Europe.
Client Testimonials
"Rational Partners has established itself as a vital technical advisor to H.I.G. European Capital Partners. Their unique blend of agility and engineering heritage sets them apart. They move beyond standard 'red flag' reporting to deliver commercially focused, actionable strategies. Whether mobilising for rapid due diligence or architecting complex buy-and-build consolidations, their pragmatic approach translates technical risk into clear investment decisions."
"Rational Partners delivered exceptional technical due diligence on our IMP Software investment, providing the depth and clarity we needed for confident decision-making. We appreciate their collaborative approach and genuine commitment to creating lasting value for both investors and founders."
"We're very happy with the support we got from Rob and his team in diligencing an investment opportunity for PROfounders. They were very responsive, giving clear and comprehensive feedback on the company's technology and engineering team. Their work highlighted the risks and virtues of the opportunity, all of which fed into our investment decision."
Frequently Asked Questions
CONTACT US
Talk to a partner who has assessed technology risks across European borders in hundreds of investments.
30-minute conversation to understand your deal or portfolio challenge and whether we are the right fit.