John Lilly

John Lilly is a former Mozilla CEO and longtime Greylock partner who angel-invests from San Francisco, writing $250k+ checks at seed and Series A. His healthcare focus per the profile is health IT software and consumer wellness, with no AI focus flagged, which fits a generalist software-investor pattern rather than a healthcare specialist. Founders building healthcare software with strong product instincts, consumer-facing wellness platforms, or companies that benefit from a senior product-and-platform operator on the cap table are the natural fit. The check size is meaningful enough to be a real signal but not large enough to lead institutional rounds; treat him as a high-quality participant in a round with an institutional lead. He is not a domain-deep healthcare investor and is the wrong audience for biotech, devices, or anything requiring clinical expertise. Outreach is best handled through warm introductions from his Greylock-era network, Mozilla alumni, or fellow product-led founders. Without a Twitter presence or website link in the profile, LinkedIn is the primary cold channel, and notes should be tight and product-focused rather than vision-led. Without an explicit thesis statement attached to this profile, founders should treat him as a generalist with healthcare appetite rather than a sector specialist, and prioritize him only if the company has a strong product-led story.