It started with a question nobody could answer.
Why when predicting future value do we just default to ‘add on 5%’?
When Alexander was evaluating his first flat purchase, he did what most analytically-minded buyers do. He asked questions.
Specifically, he asked every advisor the same one: how do you arrive at a future value figure?
The answer, from every agent, every broker, and every sourcer he spoke to, was a version of the same thing.
Add 5%. It's the industry standard. It's what we use.
As a financial analyst, Alexander knew that wasn't an answer. It was an assumption dressed as expertise. He pushed back. He asked where the 5% came from, what data it was built on, what model produced it.
The answer, uncomfortably, was that nobody really knew. The 5% had been passed from advisor to advisor for long enough that it had become convention. No model. No reasoning. No data behind it. Just an industry-wide figure that everyone had inherited and nobody had interrogated.
What unsettled him wasn't just that the 5% was a guess. It was the scale of the decision it was being used to inform. These were six-figure commitments, made by careful, intelligent people, on a projection that amounted to: we've always done it this way.
So he built something to replace it.
Not a replacement, a supplementation
Quoin is a property data platform. It tells investors whether a property is a good investment (today's value, projected future value up to ten years, rental yield, and the financial KPIs that matter) in plain English, with the reasoning visible.
It was built for UK property investors outside London: the people building a portfolio of one to five properties alongside a career, making significant financial commitments, and being underserved by an industry that gives institutional operators better data as a matter of course.
The platform does not tell investors what to do. It gives them the information to make decisions they can genuinely stand behind. There is a difference between making a decision and understanding one. Quoin is for the second kind.
Quoin is not a replacement for letting agents, mortgage brokers, or financial advisors. Their expertise, their relationships, and their market knowledge are genuinely valuable, and the 5% problem was never their fault. They were working with the data available to them.
What Quoin does is give every investor (and every professional they work with) a better common foundation. A projection with a model behind it. A figure with a reason. A conversation that starts from something more rigorous than an inherited assumption.
Built here. For here.
The UK property market outside London is not a secondary market for a product built around the capital. It is a genuinely different market, with different yield dynamics, different growth drivers, and different investor profiles.
The investors building portfolios in Edinburgh, Glasgow, Leeds, Manchester, Sheffield, and Bristol are not using London-native tools adjusted for the regions. They are using tools that were never really built for them.
Quoin was built in Edinburgh, for a non London centric market with specific characteristics, and designed from the outset for the cities and regions where buy-to-let economics work. That is not a positioning statement. That is the reason the data is as accurate as it is.
The Team
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Alexander Koveleski
Co-Founder & CEO
Financial analyst turned property investor turned founder. Alexander's career was built on financial modelling and investment analysis, which made it all the more frustrating when the property market couldn't give him a straight answer. The question that started Quoin; why 5%? is still the best description of what the platform is trying to answer. He leads Quoin's strategic direction and has spent the last several years making sure the data gives investors the answer nobody else was willing to build.
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Supraja Balasundaram
Co-Founder & COO
Supraja's background is in robotics, automation, and engineering, which turns out to be an unusually good preparation for building a data platform in a market that has historically resisted rigour. As COO, she oversees operations and the technical execution of Quoin's platform development. She has been part of the business from the beginning, and her instinct for how systems actually work (rather than how they're supposed to work) is built into how Quoin is engineered.
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Federico Moro
Co-Founder
Federico has spent his career working across communications, community, and investor relations in markets across Europe. At Quoin, he focuses on the relationships that matter to a platform built on trust: investor communities, industry networks, and the professional ecosystem the platform is designed to serve. His approach to building those connections is straightforward: the product earns the conversation, and the conversation earns the trust.
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Gabriel Marques
CTO
Gabriel brings a background in mathematical optimisation, data engineering, and software development to the problem at the heart of Quoin: building projections that are genuinely grounded in data rather than inherited convention. His work sits at the intersection of rigorous modelling and practical systems architecture, which is precisely the combination Quoin requires. He is responsible for the technical infrastructure that turns regional property data into the transparent, interrogatable outputs the platform is known for.
Property investing in the UK is not a level playing field.
Larger investors have better data, better modelling, and better access. They can tell with reasonable confidence whether a property is worth buying, what it will be worth in five years, and how it sits within a wider portfolio.
Smaller investors (the ones building something significant alongside a career, alongside a family, alongside everything else) are making the same scale of financial commitment with significantly worse information.
That is not acceptable. And it is not necessary.
Quoin was built because one investor asked a simple question; why 5%? and the answer turned out to be: nobody knows. It's just what we say.
We thought that was worth fixing.
Quoin is not a replacement for your agent, your broker, or your financial advisor. Their knowledge, relationships, and experience are irreplaceable. Quoin is the thing that makes every conversation with them better, because you walk in with your numbers properly reasoned, not just vaguely remembered from a spreadsheet.
We show today's value. We project forward up to ten years. We present the numbers that matter in plain English. And we show our working.
Because an investor who understands the reasoning owns the decision. And that is the only kind of decision worth making.
Quoin. The figures, finally making sense.
See it on a property you're thinking about.
Start with one property. Full analysis, free. No card required.