The face of the health membership movement is now worth $2.5B after Function landed $298M of Series B funding to prove that subscription care is here to stay.
Function is building an “operating system for human health.” The OS “fuses AI with medical expertise to empower 8 billion people to take control of their health and get ahead of disease.”
- Translation: Function offers personalized nutrition and lifestyle recommendations based on a massive menu of lab tests that members can access for $365 per year.
- Unlike most annual physicals that measure ~26 biomarkers, Function offers 160+ tests spanning from the heart and hormones to heavy metals and cancer signals.
- It also doubled down with the acquisition of Ezra earlier this year, adding AI-guided full-body MRIs (for detecting cancers, endometriosis, strokes) and CT scans (for lung tumors, heart plaque, soft tissue damage).
The Medical Intelligence Lab takes the vision even further. Function just launched its Medical Intelligence Lab to unify all of its data – labs, imaging, wearables, and medical records – into a continuously learning model designed to reveal patterns and surface actionable insights.
The lab gives members immediate access to three new AI capabilities:
- Private AI Chat – answers health questions with responses informed by member data.
- Protocols – translate complex data into health plans with easy-to-follow steps.
- Health Records – members can securely upload lab results, visit notes, and medical records to feed into Private AI Chat and Protocols.
The testing gold rush is here… but that might not be great for everyone. Research has shown that direct-to-consumer testing companies have a history of wading into murky waters, particularly misleading marketing and a lack of care continuity.
- Function hasn’t fallen into that bucket, but its tests definitely go beyond established evidence, and multi-cancer screening still hasn’t demonstrated its clinical value.
- A shotgun approach to proactive screening is also a recipe for worried patients and incidental findings – not to mention low-value care.
- Function will have to prove that its benefits outweigh those risks, but hundreds of thousands of members are already voting with their wallets that the math checks out.
The Takeaway
Function will tell you that it isn’t just leading a new category, it’s setting the standard for how we understand, manage, and extend human health. If that turns out to be true, then $298M should go a long way toward proving it.
