Leon Eisen

Who they are

Leon Eisen is Founder and Executive Chairman at Oxitone Medical — he built the world's first FDA-cleared wrist pulse oximetry monitor and created Fundables OS™, a fundraising operating system used by 100+ Seed and Series A teams.

Person

Leon founded Oxitone Medical in May 2010 and served as CEO through August 2021, building the company from concept to the world's first FDA-cleared wrist pulse oximeter for continuous health monitoring — then stepped into the Executive Chairman seat. He holds a PhD (the 'Dr.' prefix appears consistently across profiles) and completed a program at Harvard Business School Online. Before or alongside Oxitone, he had a connection to Merantix Capital and served as a Venture Partner at BootstrapLabs, giving him a foot in both the operator and investor worlds. He's founded three distinct properties: Oxitone Medical (the medical device company), Quantum Business Thinking™ (a methodology aligning business strategy with nature's principles, hosted at leoneisen.com), and Quantum Business — plus he built Fundables OS™, a fundraising operating system that has helped more than 100 Seed and Series A teams. The through-line is inventor-turned-investor: he builds a thing, figures out how capital and founders work together, then systematizes that knowledge for others. He's an active public voice — Medium posts on AI in venture capital and seed/Series A investing, LinkedIn articles on fundraising and investor psychology, and a YouTube podcast called 'Venture Growth with Leon Eisen' where he interviews founders and investors; he also appeared on The Investor Relations Podcast ('What Investors See That Founders Don't'), Your Everyday AI, GIANT Health London, and the Persimmon Health Podcast. He's based in Kfar Saba and is a Forbes Business Council member.

Network

Leon's visible network spans healthcare entrepreneurs and venture-backed founders. Sophia Alj, Co-Founder & COO of Chari, appeared on his Intelligent Founder podcast. Amy-Renee Hovorka joined his Venture Growth with Leon Eisen show to discuss measuring and scaling innovation. He's also listed as a community member and advisor at BootstrapLabs, connecting him to a broader applied-AI venture network.

Sophia Alj· Co-Founder & COO, Chari
Amy-Renee Hovorka· Guest, Venture Growth with Leon Eisen (topic: measuring and scaling innovation)

How they likely show up

Long tenure as CEO of Oxitone Medical from May 2010 through August 2021, then transitioning to Executive Chairman → thinks in multi-year company arcs, not sprint cycles.
Dual identity as operator (device inventor) and investor/advisor (BootstrapLabs Venture Partner, Merantix Capital) → likely evaluates problems from both sides of the table simultaneously.
Built Fundables OS™ — a structured, repeatable fundraising system used by 100+ teams → strong tendency to systematize learnings rather than keep them tacit.
Active across Medium, LinkedIn, YouTube podcast, and multiple speaking circuits → comfortable being the visible voice; expects that counterparts have done the reading before the meeting.
Quantum Business Thinking™ is a proprietary methodology, not just a blog theme → he invests in framing original frameworks, which means he responds well to engagement with his ideas on their own terms.
Appeared on investor-facing podcasts ('What Investors See That Founders Don't') as well as founder-facing ones → code-switches fluently between investor and founder registers.

Conversation tips

→ Engage with Quantum Business Thinking™ on its own terms — ask what 'aligning business with nature's principles' means in practice for a company he's advising; he'll have a precise answer and will notice if you haven't looked at leoneisen.com.
→ Reference a specific Medium article or LinkedIn piece (e.g., 'Five Lessons and One Key Message from $6 Billion Deployed') — he writes to be read, and citing the actual title signals you did the work.
→ Ask about the CEO-to-Executive-Chairman transition at Oxitone — that's a deliberate move with a story behind it, and it frames everything about how he now spends his time.
→ If you're a founder, come with a crisp fundraising question — Fundables OS™ exists because he's mapped this problem in detail, and he'll engage substantively rather than generically.
→ Don't conflate his investor writing with his device-inventor background — both are load-bearing parts of his identity; treating him as purely a VC commentator undersells the hardware founder chapter.

Toolbox

Openers

Open on Fundables OS™ — he built a structured fundraising operating system that over 100 Seed and Series A teams have used; it's a concrete artifact of his theory that fundraising can be systematized, and it's a differentiator from every other 'startup advisor' positioning.
Mention his Investor Relations Podcast episode ('What Investors See That Founders Don't') — the title alone signals he's thought hard about the information asymmetry between founders and VCs, which is an unusual angle for someone who's been on both sides.
Reference Oxitone's Health Moonshot Showcase 2019 or StartUp Health TV 2020 appearances — he spent years pitching wrist-worn continuous monitoring before wearable health was mainstream, and that contrarian timing is worth acknowledging.

Discovery questions

Fundables OS™ has helped 100+ Seed and Series A teams — what's the single most consistent gap you see between fundable and unfundable decks at that stage?
Quantum Business Thinking™ applies nature's principles to business strategy — can you give a concrete example of how that framework changed a decision for a company you were advising?
You moved from CEO to Executive Chairman at Oxitone — what did that transition clarify for you about where you add the most value?

Avoid

Don't treat Quantum Business Thinking™ as soft or peripheral to his work — it's a named proprietary methodology he's built a platform around, and dismissing it will close the conversation down immediately.

Make it yours