Investor-ready financial modelling
From first pitch to selling out, we help you build, polish and present bullet-proof financial forecast models.
Some of our clients
We build models for a broad range of companies, helping with fundraising and strategy.
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D2C hardware and software
Seed
Model build
$3m equity raise
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Marketplace
Series C
Model Review + Dashboard
Equity raise + Debt facility
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Recruitment tech marketplace
Series A
Model review + Dashboard
$5.5m equity raise

Residential property developer
Growth stage
Model build
Equity raise + Senior debt facility

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Drinks brand - D2C/Retail/Wholesale
Pre-Seed
Model build
£750k equity raise
81%
of the companies we've
built models for have gone on to successfully raise funds¹.
We have helped companies raise over
£200m.
We help...
Early-Stage Founders
(Pre-Seed & Seed)
Learn to build your own 'investor-ready' model using our expert-designed course and template. Perfect for founders raising their first round on a budget.
Or let us build it for you with a bespoke full-model build tailored to your business.
Growth Stage Teams
(Series A/B/C+)
Already raised and scaling fast?
We can either build you a bespoke model, or review, refine and redesign your existing model with dashboards and metrics that matter to investors, boards and acquirers.
Founders and Operators Exploring Buyouts or Debt
Need support for a management buyout, strategic acquisition, or debt raise?
We design complex, lender- and buyer-friendly models to help you negotiate confidently.
What we do...
Model Reviews
We review your existing model, refine the logic, and create beautiful dashboards to tell your growth story.
New: Early-stage model + Deck Review
Are you at pre-Revenue/Seed stage and already have a model and deck? We'll review both and give you practical, fast feedback to sharpen your fundraising story.
Why Founders and CFOs work with us...
Because our Founder has sat on the other side of the table
GRAY Financial Modelling is led by Joe Hartman — a former VC investor who now sits on the Investment Committee of an early-stage tech fund.
Joe has reviewed hundreds of pitch decks and financial models, giving him a sharp eye for what gets investor buy-in (and what doesn’t).
When Joe builds or reviews a model, he does it through the lens of an investor:
- Is this credible and defensible?
- Does it align with the pitch narrative?
- Are the metrics telling the right story?
He ensures every model stands up to scrutiny which gives you and your investors confidence in the vision and the plan to get there.

"I've always been frustrated by the financial models I receive from companies, having to spend hours either re-building, or searching for input cells and KPIs. Thank goodness GRAY have finally changed the game with their financial modelling product and Founder support."
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Edward Keelan
Partner, Octopus Ventures
What our clients say
"Joe is unique. He combines impressive financial modelling skills with VC investment experience and provides commercial, honest feedback.
It’s a powerful combo."

Adam Levene
Founder, Hero and 37W Investments
What our clients say
"I wouldn't look any further than GRAY for a forecast model. The structure and sophistication was exactly what investors were looking for when evaluating our business. It wasn't just the model though. Joe's input was also extremely helpful during the fundraising process.”

Nnamdi Emelifeonwu
CEO/Founder, Definely
What our clients say
"Joe balances decades of experience in Venture Capital with a uniquely measured and insightful approach. He is one of the most impressive individuals I have met in the space."
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Dr. Reuben Wilcock
Head of Ventures, Blackfinch
What our clients say
"We came to GRAY at a critical juncture. What Joe was able to put together in a short period of time was nothing short of exceptional. Not only did the financial model completely realign our strategy, it presented as a seamless companion document and feedback loop for the pitch deck and brand itself. We would strongly recommend GRAY to anyone attempting to navigate the challenging and choppy waters of venture capital."

Ed Bennett-Coles
Co-Founder, ARK
What our clients say
"Joe came highly recommended. He really took the time to understand our business and how our specific revenue model works, developing a sophisticated model we could use both for our pre-Seed fundraise and also, importantly, at an operational level to track our spend and cash going forward. I'd recommend GRAY to any startup needing a professional model for fundraising and operations."

Darren Westlake
CEO/Founder, Disco
What our clients say
"We received so much positive feedback about your model - it definitely helped us get the fundraising round closed. Thank you.”

Richard Remington
Co-Founder, SalesRook
What our clients say
"Joe was outstanding to work with. The concept of the fully integrated model for investment was a difficult problem to solve, with multiple areas of the business we know so well having to be forecasted out with detail we hadn't previously explored. Joe worked with the thought and process of a vast organisation but with the speed and nimbleness of a small one. He quickly became a critical part of the team. A BIG thank you for your brilliant work.”

Joe Jaques
Jaques of London
What our clients say
" I was just doing a quick sweep of the data room - I couldn't help but mention that the Executive Summary tab in your financial model is BY FAR the best laid out summary tab I have ever come across! ”

Investor
Investor
What our clients say
“Joe worked to a tight timeline for us and delivered an exceptional model to support our financial planning.”
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Elin Haf Davies
CEO, Aparito
What our clients say
“Our model needed tidying up for our Series A round. Gray professionalised the model, introduced sensitivity analysis and built an Executive Summary that highlighted our KPIs. I know the model impressed investors and helped us achieve our desired valuation.”
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Mikhil Raja
CEO, SonicJobs
What our clients say
“Joe was a pleasure to work with and built a fully-integrated three statement forecast model very efficiently. The modelling was high quality, reliable and flexible, which made it easy for us and the management team to adopt it. Joe, and the team at Gray, were a key part of all parties reaching a successful outcome. I wouldn’t hesitate to recommend Gray’s services.”
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David Fernie
Vice President, Kester Capital
What our clients say
"'To prepare for our late-stage seed round, Joe took our existing financial model and upgraded it on multiple fronts, including a much-improved sensitivity analysis and a complex earnings predictor that took into account multiple revenue streams. He was the ultimate professional to work with and I have no hesitation in strongly recommending his services."
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Gerry Lianos
CEO, Raffolux
What our clients say
"Joe worked tirelessly to produce an amazingly high quality model in record time. Really good comms and a pleasure to deal with. All at a very reasonable cost. I will happily recommend Joe to friends, family and colleagues."
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Naveen Cavale
CEO, Real Plastic Surgery
What our clients say
"Most start-ups find it challenging to create a strong financial model due to its complexity, and our company was no different. Despite my background as a data analyst and creating a decent model, it lacked clarity. Luckily, Joe was able to restructure the data in an easy-to-read format. He grasped our business model quickly and was friendly and easy to talk to. I strongly recommend Joe to anyone seeking assistance with their financial model. Thank you Joe!"
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Anderson Caicedo
Co-Founder, GreenBay
What our clients say