Duet Partners
Tel: +44 (0) 20 7416 6630 / Email: partners@duetpartners.com

Startup to Scaleup Advisory

Duet provides specialist funding support to high growth Technology companies crossing the chasm from late Seed into the early stages of Growth.

The Chasm

The decline in the graduation rate of Seed stage companies to Venture and Growth stages has created increasing anxiety for entrepreneurs in recent times. Across Europe, only 1 in 5 startup companies make it to Series A and early scaling. Only half of these go on to reach Series B.

Yet this is at a time when venture funds have record amounts of capital to deploy. Investment risk appetite has reduced significantly in recent years - investors have tightened criteria as their deal flow pipelines have surged. Competition for capital has intensified as the number of early stage deals has reduced.

Duet Partners is a corporate finance adviser that helps early stage Technology companies navigate this journey. We have worked with dozens of founders & CEOs on the transition from startup to scaleup, often through multiple investment rounds. Through a combination of executive coaching, business model assessment, funding plan creation, and capital raising, we have helped companies raise over $100M and successfully cross the chasm.

We have helped dozens of companies transition to the scaleup phase

Who We Are

The founders have over 30 years' experience working in the Tech sector, from Silicon Valley corporates to UK startups.

We have raised over $200M during our careers and taken dozens of Technology businesses through the funding process, including our own.

What We Do

We provide advice on all aspects of the capital raising process, from 1/1 CEO support to funding mandates.

Successful entrepreneurs understand how to bring together a vision and a process to build a scalable business. We are practitioners of the process.

How We Do It

Our flexible engagement model enables us to provide funding support that is tailored for individual company needs.

We are not just transaction driven – we are true partners on the journey, from late Seed, through Venture and into the early phases of Growth.


We engage as early as possible in the new funding cycle to ensure alignment between the funding strategy and the business strategy.

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Funding Plan

Investment Analysis: the development of the optimal funding plan without having to commit entirely to the process. All stages from Seed to Growth.

"The investment analysis work that Duet does is first class, invaluable and worth every penny."
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Capital Raising

Funding Mandate: undertaking Venture & Growth stage fundraising projects from materials development to money in the bank.

"The process was managed in a highly effective, professional way and we achieved all of the targets we had set.."
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Corporate Advisory

Scaleup Support: specialist advice on all aspects of funding, business model validation, corporate development, and more. All stages from Seed to Growth.

"...a clear and insightful analysis of where our business was, and what we needed to do to deliver value and grow."


  • "I engaged Duet Partners to run an ‘A' round funding process for the company. They helped us engage with a high quality syndicate combining both financial and strategic VC’s. The process was managed in a highly effective, professional way and we achieved all of the targets we had set for ourselves at the beginning of the project. I would highly recommend John and the team to other organisations looking for VC funding."

    Steve Kelly, CEO/Founder, SmartKem

  • "Working with John is empowering and reassuring. He has a brilliant ability to get under the skin of a business and it’s key people, spot superb opportunities and help to execute on them. The investment analysis work that Duet do is first class, invaluable and worth every penny. I’d recommend it to any business looking to scale-up and seize every growth opportunity along the way. I also love the fact that they’ve very selective about the businesses with whom they choose to work. You know once they’re on your side, that you’re in the best hands and that they’re putting their ‘might’ behind you."

    Merlie Calvert, Founder & CEO, Farillio

  • “The Duet team brings a real depth of experience to early stage company building and this was immediately apparent in the funding preparation stage. A well managed capital raise was then successfully undertaken syndicating both VC and strategic investors. We really enjoyed working with John and Jonathan and look forward to further engagements in the future.”

    Andy Heaton, Founder & CEO, enModus Ltd

  • "Duet Partners are the very best at assessing and then delivering the best financing solution available. They have an extensive range of contacts throughout the industry both in the UK, the US and Europe. In my experience, this resulted in investments that supported our long term objectives whilst meeting immediate term needs. A great team to work with and would use them again."

    Mike LeGoff, former CEO, Plessey Semiconductors Limited

  • "Duet provided a clear and insightful analysis of where our business was, and what we needed to do to deliver value, and grow. Those priorities are on my desk and the focus of my activities every week. We much appreciated their work and hope to engage them further in the next round of fundraising."

    Chris Smith, Managing Director, G-Volution Ltd

  • "The Investment Analysis process provided great insight into the current funding market and an excellent critique of our investment proposition. We have since retained Duet to assist in the further development of the funding strategy for the next round and to help ensure our state of readiness. Their advice has been highly valued.”

    Andy Travers, CEO, Ceres Holographics Ltd.