investing
Angel checks
small checks into founders I believe in.
I write small angel checks alongside my own companies. No fund and no thesis deck: just conviction in specific founders, most of whom I've watched operate up close. The list runs from the company doing best to the one that has already wound down, as far as public information goes. Company names link to their sites; the mono links on the right point to each latest public milestone. Some of these will be huge, some already wound down. That's the game.
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Modular nuclear reactors for heavy industry and AI compute. First VC-backed startup to split the atom; Ward 250 went critical in June 2026.
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The infrastructure layer for trusted outbound business texting. 21,000 businesses, two billion messages sent.
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An agent harness for security and IT teams to run autonomous technical operations.
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Upfront, transactable pricing for healthcare: the price before the appointment instead of a surprise bill after. 945 providers live, 388,000 patients.
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The AI front desk for dental groups: zero missed calls, around the clock. A million appointments booked.
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A hiring network that connects neurodivergent talent with the employers who need them.
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Helping brands see, and win, how AI answer engines talk about them.
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AI revenue infrastructure: sales conversations become CRM updates, follow-ups, and forecasts.
- Sammy Labs ↗ yc w25
Deterministic, interpretable legal and compliance AI.
- Antigen ↗ yc f25
Continuous offensive security for the enterprise.
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A physically accurate virtual fitting room: see clothes on your own body before you buy.
- Ender dead
An early real-estate software bet. Dead now, no longer functioning. Some rides end early.
