Financial Modelling & Valuation Advisory
The missing layer in your decision‑making
Complex numbers shouldn't mean complex decisions. At InsightLayer, we build the underwriting, deal and valuation models that turn problems too difficult to solve in-house into clear decisions for funds, founders, CFOs, and investors.
Trusted by first-time founders and $500bn+ AUM managers alike
The process
How we can help
Your problem
You deal with high complexity, but your tools can't keep up. Convoluted structures, black-box legacy spreadsheets, gaps in reporting mean you lack clear visibility of your numbers.
Our solution
We enhance your existing models or rebuild them from the ground up, applying best practice and designing solutions tailored to your exact deal or growth plan, and finally freeing you from spreadsheet debt.
The result
You take away a user-friendly, scalable model that your team can confidently run, producing clear, defensible numbers your Board and investors can trust.
What we do
Services
InsightLayer Studio
Institutional-grade, now in your browser
Every model in InsightLayer Studio, our live online modelling environment, started as a bespoke spreadsheet built for an institutional client, then rebuilt as a living web app. Run your own numbers and see the quality for yourself.
Our clients
Who we serve
We partner with teams across the full capital stack, from early‑stage founders to global investors.
Why it matters
Bottom line benefits
Why leading founders, CFOs, and investors trust us with their toughest numbers.
Raise capital faster
Raise capital faster by providing investors with the exact numbers and scenarios they require.
Unlock trapped value
Unlock trapped value in messy spreadsheets by fixing errors and surfacing hidden insights.
Forecast with confidence
Forecast with confidence so you can plan growth, hiring, and funding without surprises.
Avoid costly missteps
Avoid costly missteps by stress-testing assumptions and modelling downside risks early.
Cut decision-making time
Cut decision-making time by turning complex financial data into simple, actionable outputs.
Future-proof your finance function
Future-proof your finance function with scalable models built to grow with your business.
Selected work
Case studies
Business plan & operating model for venture studio
Monte Carlo of commute times for consultancy
Financial model & dashboard for SaaS startup
Loan book analysis & dashboard for retail bank
Three-statement forecast for traditional brick and mortar business
Proud to have worked with:
…and supported over $200m in capital raised to date.
Vittorio Santagostino
ACA · CFA Charterholder
Founder & Principal Consultant
About
Meet your new favourite business partner
With over a decade of experience serving founders, investment banks, private equity funds, hedge funds, and investment managers in the City of London, I am a Chartered Accountant and CFA Charterholder who has built and reviewed hundreds of models across industries and deal types, from early-stage startups raising their first round to multi-billion-dollar transactions.
My background spans complex valuations, portfolio analysis, and financial planning, giving me the rare ability to cut through noise and focus on what drives real business impact.
While highly technical, my approach is and always will be client-first. I don't just deliver a solution, I empower you and your team to understand it and own it from there on out.
Client voices
What they say…
I am a former McKinsey Consultant at McKinsey & Company, Investment Banker at Goldman Sachs and Hedge Fund Investor at Bridgewater Associates. I am accustomed to working with the smartest people in their fields who the deliver the very finest quality of work and Vittorio ranks among them. He is smart, incisive, sees things that I didn't and suggests helpful modifications to my work and is THE best Freelancer with whom I have worked. He is my trusted Thought Partner and go to Freelancer for all complex excel and valuation modeling from this day forward.
Vittorio is an exceptional FP&A and financial modeling analyst and more importantly, a true strategic partner. We worked together on several complex projects that required not just technical skill, but real business judgment: things like restructuring service pricing, modeling out multi-scenario forecasts, and cleaning up messy assumptions. He's fast, thoughtful, and highly collaborative. I never had to over-explain things, he just got it. I'd absolutely work with him again and again!
Ready to start
Book your free consultation
Not sure where to start? Book a consultation to discuss your goals, review your existing models, and identify the best path forward. We'll map out scope, timelines, and deliverables so you know exactly what to expect and when.
Book now
Get in touch
Contact us
Interested in working together? Want to know more? Fill out some info and we will be in touch within 24 hours. We can't wait to hear from you!