For investors and leadership teams operating across European borders, where cross-border is the default, not the exception
Who we serve
Investors
Independent technology due diligence and portfolio oversight for PE and VC firms making cross-border acquisitions across the UK and Europe. From pre-investment assessment to post-deal value creation.
For operating partners, investment directors, and deal teams who need confident technology decisions on assets across European markets.
CEOs & Business Leaders
Hands-on technology leadership for companies navigating growth, change, or transition. Fractional CTO and CPO services from operators who have led teams across European markets.
For CEOs, founders, and managing directors running EUR 2M to EUR 100M companies who need technology leadership that understands how business works across borders.
Why choose Rational Partners
International Perspective
A British firm with deep roots across European technology markets, from Dublin to Stockholm, Amsterdam to Milan. We bring comparative insight from more than a hundred engagements spanning Western, Northern, and Southern Europe. We know what good looks like across markets, not just in one.
Investment-Aligned Perspective
We understand value creation plans, EBITDA impact, and the mechanics of de-risking investments. We frame technology findings in terms that matter to investment committees, whether they sit in London, Munich, or Amsterdam.
Cross-Border Regulatory Fluency
We operate across FCA, BaFin, AMF, CONSOB, the Central Bank of Ireland, the Dutch AFM, and Finansinspektionen. We understand GDPR as it is applied by different national authorities, from the ICO to the CNIL to the Garante to the Dutch AP. For investors acquiring regulated European businesses, this fluency is not optional.
Independent & Vendor-Neutral
No technology partnerships, no service upsells, no equity interests. Our recommendations are based purely on what is right for your business, not what is profitable for ours.
Proven Methodology
Our 5P Framework has been refined across more than a hundred engagements with VC and PE-backed companies from seed to exit across the UK and Europe. Every assessment follows a structured, repeatable process. Nothing gets missed, regardless of jurisdiction.
Operators, Not Consultants
We don't advise from outside. We embed in your team, attending standups, reviewing code, and making decisions alongside your engineers. No external consultants producing reports nobody reads.
Trusted by Investors Across Europe
"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."
"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."
"Rob absolutely lived up to his commitments. He hit the ground running, quickly engaged with all stakeholders, and came up with a diagnosis within the first couple of weeks. After only three months of part-time involvement, he has transformed our tech position and direction and leaves us well positioned for the future."
Our Services
Independent assessment of technical architecture and engineering capabilities to inform investment decisions. Whether your team calls it IT Due Diligence, audit IT, or audit tecnologico, the question is the same: is this technology fit for the investment thesis?
Part-time strategic technology leadership for companies that need senior expertise without a full-time hire. Known as Interim CTO in Germany, DSI de transition in France, and CTO ad interim in Italy. The concept is the same: experienced leadership, embedded in your team.
Strategic product leadership to sharpen your roadmap, align teams, and drive outcomes without a full-time hire.
Practical guidance on implementing AI solutions that deliver real business value, from strategy through to implementation.
One-on-one mentorship for technology leaders navigating growth challenges. A Sparringspartner for your CTO, not a classroom exercise.
Diligent technology leadership delivered by experienced operators across the UK and Europe, on short notice
Whether you are assessing a cross-border acquisition, scaling technology in a European portfolio company, or need senior leadership for a subsidiary far from headquarters, we provide experienced operators who understand how business works across the continent. We would welcome the conversation.