Isabelle Smith

Principal, Venture Creation, Diagram Ventures
Isabelle Smith is a hands-on climate investor with engineering net-zero leadership at AtkinsRéalis/SNC-Lavalin, Decarbonomics co-founder, and UK-to-Canada standard-setter focused on building decarbonization, transport, airports, and the business case for decarbonization.
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Isabelle Smith
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Fintech
Climate
Web3 / Crypto
AI
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About Isabelle Smith

Isabelle Smith brings an unusually hands-on background for a climate investor, having previously led engineering net-zero work at AtkinsRéalis/SNC-Lavalin and co-founded Decarbonomics, with deep ties to building decarbonization, transport, and airport sustainability, plus standard-setting roles like founding LETI and involvement with the UK Net Zero Building Design Standard, UK FIRES, and the UK Green Building Council. She also frames her climate work around the business case for decarbonization rather than only the environmental case, combines UK net-zero roots with newer experience in Canada, has judged the Ontario Embodied Carbon Awards, and writes more broadly about systems thinking and resilience through her blog, The Panthalassan.

About their Fund

Diagram Ventures

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Fintech, Climate, Web3 / Crypto, AI, Insurtech
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Pre-Seed - Series A
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Diagram builds companies internally—validating problems and sometimes securing pilot customers or an MVP before recruiting founders—then stays closely involved from day zero, intentionally creating only about 2–3 startups per year in each focus area, and since Fund III has also started investing in outside startups it didn't create. This same systematic approach, which helped produce outcomes like Dialogue's IPO in fintech, is now being applied to climatetech through capital-efficient software bets like ReliON, with continued backing from pre-seed through exit via a dedicated Opportunity Fund.

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