Impact Isn’t Enough: How Founders Can Build Investor Confidence
Updated: Oct 3
The UK social impact investment market now stands at £11.2 billion (Better Society Capital, 2024). That figure was framed during presentations during this week's Impact Unlimited; a summit dedicated to scaling positive change for people, places, and planet.
It offered a lot of food for thought on the strategic advice I give to founders, particularly those building impact driven startups and scale ups preparing for investment.
One session explored the familiar storytelling arc for early stage ventures: at Seed, you sell the ‘Grand Vision’; by Series A, you have the data to prove whether ‘This Is Working!’; signs of early product market fit, credible go to market plans, customer acquisition logic and ROI.
It’s a useful model, but I think it’s only half the picture.
Throughout my career, whether pitching high profile philanthropy, venture capital, or blended finance, or when I collaborate with founders to get them Seed investment ready, I anchor the pitch narrative around three core pillars:
1. Know Your Investor
Every investor has a worldview, a vocabulary, a theory of change. Assume they expect commercial returns, they will. But understand what else matters to them and how they articulate it. Do they frame impact through formal ESG reporting criteria? or through UN PRI or the SDGs? Do they use the Impact Management Norms’ five dimensions. Or, align with FCA Sustainability Disclosure Requirements or run highly thematic funds focused on Net Zero.
Look at their portfolio. Read their impact reports. Study their disclosures. Understand how they track data and what they consider credible evidence. Funds with defined impact mandates have committed to deploy capital against real-world problems, and their Limited Partners expect it.
Before you pitch, understand how they report; this will give you a better understanding of how to shape your story. Mirror their priorities. But do it with integrity: Investors recognise authenticity, but they also recognise pandering.
2. Know Your Data
When you pitch for Seed funding, investors don't expect historic revenue. They do however expect you to be so ingrained in the challenge your product addresses that you can show early signals of viability.
Prove the pain point with the real numbers. Then show your hypothesis for how your product has the potential to shifts those trends. Articulate who benefits, by how much. Be transparent about risks.
UX testing data gives you a baseline and an early read on market viability. Presenting "We showed this to 35 potential customers, and 85% agreed it solved X" is better than flying blind. Yes, it’s sentiment over commercial figures, but at Seed, it demonstrates momentum. Be candid about what it is, then show how many of those users are willing to convert into a formal pilot pipeline, a paid beta, or a signed Letter of Intent (LOI).
Finally, build your market sizing bottom-up. Name your buyer and what triggers their purchase: for institutional customers this may mean carbon targets, regulation or procurement mandates. Outline your estimates on the length of your sales cycle. Demonstrate you know competitor gaps, and where your product fits. Demonstrate your execution speed.
Investors care deeply about momentum at Seed stage. There is always data to share.
3. Know the social / environmental / human impact angle
The Grand Vision, the blue-sky thinking, isn't the whole pitch, but it is a full pillar of it. It shows you understand the big picture, world-view surrounding the impact you are wanting to make. Pillars 1 and 2 give it breadth and substance.
Remember to be human and grounded. Impact does not sell itself. Seed Investors back teams first: why you, and why now? They want reassurance that your commitment to your mission won't erode under pressure, whether at exit or in later rounds. Also, Founder fallout remains a core reason why start-ups fail, demonstrate that your Founders share the vision, and have full transparency and alignment with each other.
When real-world impact is genuine, your early users become your loudest evangelists. They create an organic, word-of-mouth momentum that high-value marketing campaigns can’t buy and anchor it against the core fundamentals of your business.
What the Afternoon Panel Confirmed
Later in the day, Richard Brass (Rothschild & Co) and Paul Miller OBE (Bethnal Green Ventures) shared their perspectives on securing investment for impact.
For me, coming from the other side, it was reassuring to hear them say that Founders approaching investment with ‘radical hope’, who are ‘optimistic that the challenges can be solved’ are often more successful. Because, having led multi-million $ and £ and multi-country social and environmental impact initiatives, including attracting the investment, I still maintain a radical hope and optimism that positive impact is not just possible, it's inevitable.
Richard advised start-ups should be able to "Articulate why its new, give measurement breadth, and depth contextualised, to drive investor confidence," and "Keep talking about how your product is delivering your purpose."
Paul advised start-ups should, "Know yourselves, know your business. Be confident in what you can achieve.”
Radical Hope, Stress Tested
The impact founders who scale do not simply dream about a better world; they stress test their optimism against problem data, UX testing, paid pilots, early unit economics and un inflated impact metrics. Optimism that has survived scrutiny is exactly what institutional investors fund.
When your real world impact scales in step with your revenue, mission and margin stop being a trade off. They become the same growth curve, transforming belief in your purpose into a genuine commercial advantage.
So, know your investor, know your data, know your grand vision. Be unapologetic about the impact you intend to create. And believe in what you can achieve. Then, tell one story that answers their questions before they ask: here is the future we are building, here is why it matters to your fund, and here is the evidence it is already moving.
Evidently, there’s at least £11.2 billion available for you to get started!
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