WillItSurvive
Medical technology and health companies · United States

Function Health

functionhealth.com ↗

Membership service selling lab tests, biomarker tracking, and imaging add-ons direct to consumers.

Losing its protection
Assessed 22 July 2026 · Evidence as of 22 July 2026
The structural protection is eroding.
On the recordSince 22 July 2026 · Checkable from 2026 · Every call on the record Checkpoint: Function Health v. Superpower Health federal litigation reaches pretrial resolution
The call

Function Health sits on real physical infrastructure that AI can't touch, but Quest's slower-moving lab network and a price war with Superpower are the fights that decide if that infrastructure pays off.

Function Health operates a membership service that sends phlebotomists to your home to draw blood, partners with imaging centers like Ezra, and uses artificial intelligence to explain your test results and suggest lifestyle changes. The company is hard to copy in the short term because it has licensed labs, contracted phlebotomy networks, and access to Equinox gyms for marketing, but Quest Diagnostics already owns the lab infrastructure Function depends on and could launch their own subscription service tomorrow, while rivals like Superpower and InsideTracker charge less with similar features, and ChatGPT-style AI can now do the interpretation layer that Function built its value on. The one thing that could prove this sustainable is whether members actually renew year after year; if most cancel after their first test results, the impressive growth numbers hide a leaky bucket.

Why
01
AI pressure: General chatbots like ChatGPT and Claude. AI already reads lab panels and explains biomarkers for free, undercutting the interpretation layer members pay Function for. Could AI do the core job? Only partly.
02
Bigger players: Quest Diagnostics. Quest owns the 2,000+ draw sites Function rents and already runs its own DTC site, questhealth.com, at lower cost. Could a giant copy it? Probably.
03
What protects it. Owned physical assets like Getlabs mobile draws, Ezra imaging, and 200k-member data that AI and copycats can't instantly replicate.
What would change this call
Quest Diagnostics launches or expands a subscription DTC product using its owned lab network. Would show Quest closing the price/access gap and pressuring Function's margins.
Outcome or settlement of Function Health v. Superpower Health (C.D. Cal. 2:26-cv-00810). Would show whether litigation reshapes marketing practices or competitive standing.
Function discloses year-over-year member retention/renewal rates in future funding or press materials. Would show whether the 450% growth reflects durable renewals or one-time churn.
Key numbers
  • $298M Series B at $2.5B valuation (2025-11-19)
  • Members grew 40k to 200k+ in one year (2025-05-07)
  • Price cut $499 to $365/year, 27% drop (2025-11-19)
Named risks
  • Unproven multi-year member retention; growth could be a one-time data-dump treadmill. Severity: high
  • Quest or LabCorp could launch a serious rival DTC subscription, collapsing Function's price umbrella. Severity: high
  • Active federal litigation with Superpower Health filed January 2026. Severity: medium
  • 27% price cut in Nov 2025 pressures unit economics amid membership growth push. Severity: medium
  • Integration risk from three acquisitions (Ezra, Getlabs, SuppCo) within about 12 months. Severity: medium
Rivals, as read in July 2026
RivalDirectionEvidence
Quest DiagnosticscontestingOwns 2,000+ draw sites Function rents; runs questhealth.com DTC since Dec 2024
LabCorpcontestingRuns Labcorp OnDemand, its own direct-to-consumer lab testing arm
Superpower HealthcontestingUndercuts at $199/year; sued by Function for false advertising, Jan 26 2026
InsideTrackercontestingComparable DNA and biological-age testing at $489-589/year as of June 2026
Marek Health, Mito Health, OneTwenty, Parsley Healthgaining onFunded peers offering feature parity, prescriptions, or lower prices as of 2026
Questions people ask
Is Function Health profitable?
No profitability figures are disclosed. Sacra estimated Function hit a roughly $100M revenue run rate in February 2025, up about 450% year over year, while the company raised $298M in a Series B at a $2.5B valuation on November 19, 2025, suggesting investors are betting on growth over current profitability.
Could AI replace Function Health?
AI could replicate Function's interpretive layer (turning lab values into readable reports), which is why it launched its own Medical Intelligence Lab chatbot in November 2025. But its physical moat, 2,000+ Quest draw sites, Ezra MRI/CT scans, and Getlabs phlebotomy (acquired April 2026), resists pure AI replacement.
Who owns Function Health?
Function Health is private and venture-backed, with no parent company. Its Series B closed November 19, 2025 for $298M at a $2.5B valuation, led by Redpoint Ventures with a16z, Battery Ventures, Aglaé Ventures, NFDG, and celebrity investors including Matt Damon and Kevin Hart.
Is Function Health being sued?
Yes. Function Health filed a federal lawsuit against Superpower Health on January 26, 2026 (C.D. Cal., Case No. 2:26-cv-00810) alleging false advertising and Lanham Act violations over comparative marketing claims. The case was still in pretrial stages as of June 2026.
Who is Function Health's biggest competitor?
Quest Diagnostics is the structural threat since it owns the 2,000+ draw-site network Function rents and already runs its own DTC arm, questhealth.com, launched December 2024. Superpower Health ($199/year) directly undercuts on price and is now in litigation with Function as of January 2026.
Has Function Health cut its prices?
Yes. In November 2025 Function cut its annual membership price 27%, from $499 to $365 per year, alongside acquiring Ezra's full-body MRI (repriced from $1,495 to $499) and launching a $349 Heart & Lungs CT add-on, moves aimed at driving volume amid rising competition.
Timeline
  • 2026-05Acquired SuppCo, a supplement rating and testing platform
  • 2026-04-10Acquired Getlabs, adding mobile and at-home phlebotomy
  • 2026-01-26Sued Superpower Health in federal court over comparative advertising claims
  • 2025-12Expanded Equinox partnership into Equinox's Precision offering
  • 2025-11-19Closed $298M Series B at $2.5B valuation, launched Medical Intelligence Lab AI chatbot
  • 2025-11-19Cut annual membership price 27%, from $499 to $365
  • 2025-05-07Sacra estimated Function reached a ~$100M revenue run rate, up ~450% YoY
  • 2025-05Acquired Ezra, adding full-body MRI/CT scanning
  • 2024-06Raised $53M Series A led by a16z at a ~$191M valuation
  • 2022-03Raised ~$3M pre-seed round
Revision history
22 July 2026
First assessed. Losing its protection. The text above is fixed as of this date and is not edited afterwards.
In the same band
NeuralinkKingmed DiagnosticsMeinian Onehealth
More in Medical technology and health companies →
Sources