Sof @sofletter
I write about cool startups, their stories and strategies of visionary founders. sofletter.com Joined November 2025-
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If you tell the right kind of person about the almost impossible goal you want to achieve, it will energize them rather than make them hopeless. Those are the people you want around you.
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@KyungSubLee @MalayVasa @typesafeai I just saw this today! Here we go ⚡
Sources Founder post: emigal.com/2025/05/05/ezr… (accessed August 31, 2026) Company announcement, Series A: prnewswire.com/news-releases/… (accessed August 31, 2026) Company announcement, Series B and MI Lab: functionhealth.com/article/functi… (accessed August 31, 2026) Company announcement, Getlabs: prnewswire.com/news-releases/… (accessed August 31, 2026) Company announcement, SuppCo: functionhealth.com/article/functi… (accessed August 31, 2026) Company announcement, growth financing: prnewswire.com/news-releases/… (accessed August 31, 2026) Company terms: functionhealth.com/legal/terms-of… (accessed August 31, 2026) Company privacy policy: functionhealth.com/legal/privacy-… (accessed August 31, 2026) Company consumer health data privacy policy: functionhealth.com/legal/consumer… (accessed August 31, 2026) Company leadership page: functionhealth.com/about (accessed August 31, 2026) Company pricing page: functionhealth.com/pricing (accessed August 31, 2026) Investor memo: a16z.com/announcement/i… (accessed August 31, 2026) CNBC: cnbc.com/2025/05/05/fun… (accessed August 31, 2026) Fierce Healthcare: fiercehealthcare.com/health-tech/st… (accessed August 31, 2026) Independent editorial commentary. Not affiliated with, endorsed by, or sponsored by Function Health, any company named, or any individual mentioned. Quotes are from public statements and published policies. For corrections, email: [email protected].
To read more startup stories like this, follow me @sofletter. I do this weekly!
In April 2023 a company launched a blood test subscription in beta. A year later it cost $499 a year. Its last disclosed valuation is $2.5 billion, and the membership price has gone down, not up. This is the story of Function Health (@function). Let's dive in! A thread🧵👇
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