Your European Technology Advisory Partner
On-the-Ground Expertise for US Investors in UK and European Technology
The international bridge between US investment decisions and UK and European technology reality
Who we serve
US PE and VC Investors
Independent IT due diligence and portfolio technology oversight for US firms acquiring, investing in, or managing UK and European technology companies.
For PE operating partners, VC partners, and investment directors who need confident technology decisions about assets on the ground in Europe.
CEOs of European Subsidiaries
Hands-on technology leadership for US-owned companies operating in the UK and Europe. CTO as a Service and fractional CPO from operators who understand both sides of the Atlantic.
For US-based leaders running European subsidiaries or acquired companies who need technology that performs in a UK and European operating environment.
Why choose Rational Partners
On-the-Ground in Europe
A British firm with deep roots across UK and Western European technology markets. We have the relationships, the regulatory fluency, and the pattern recognition that comes from building and assessing technology companies here for decades.
Investment-Aligned Perspective
We understand value creation plans, EBITDA impact, and the mechanics of de-risking investments. We speak investor language and frame technology findings in terms that matter to US investment committees evaluating European assets.
Cross-Border Regulatory Fluency
We work across FCA, HMRC, UK GDPR, and European regulatory frameworks alongside SEC and US compliance requirements. For US investors acquiring regulated European businesses, this literacy is not optional.
Independent & Vendor-Neutral
No technology partnerships, no service upsells, no equity interests. Our recommendations are based purely on what's right for your investment, not what's profitable for ours.
Proven Methodology
Our 5P Framework has been refined across 100+ engagements with VC and PE-backed companies from seed to exit across the UK and Europe. Every assessment follows a structured, repeatable process so nothing gets missed.
Operators, Not Analysts
Our assessors are practicing CTOs who have built and scaled the systems they now assess. We work as part of your deal team, not as external consultants producing reports nobody reads.
Trusted by Investors Across Europe and the US
"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.
Part-time strategic technology leadership for companies that need senior expertise without a full-time hire.
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.
One-on-one mentorship for technology leaders navigating growth challenges.
If your investment thesis includes UK or European technology, you need advisors who are already there
Whether you are evaluating an acquisition target, managing a European portfolio company, or preparing a UK asset for exit, talk to a partner who understands the market from the inside.