Function Health vs Optum
Side-by-side comparison of AI visibility scores, market position, and capabilities
Raised $298M Series B (Nov 2025) at $2.5B valuation. Largest-ever longevity raise. 160+ lab tests + full-body MRI. Medical Intelligence AI model launched.
About
Function Health is a consumer preventive diagnostics company offering 160+ laboratory tests plus a $499 full-body MRI scan, all direct-to-consumer with AI-powered health intelligence layered on top. The company raised $298 million in Series B financing in November 2025 at a $2.5 billion valuation — the largest private fundraise in the longevity and preventive health space in history. The Medical Intelligence generative AI model, launched alongside the round, personalizes health guidance based on longitudinal biomarker data accumulated across repeat testing cycles.
UnitedHealth Group (NYSE: UNH) health services at $226B revenue combining Optum Health clinics, Optum Rx PBM for 65M+, and Change Healthcare analytics; largest US health services company competing with CVS/Caremark.
About
Optum is the health services subsidiary of UnitedHealth Group (NYSE: UNH) — one of the world's largest companies with $400 billion in annual revenue — operating Optum Health (care delivery: primary care clinics, urgent care, surgical centers), Optum Rx (pharmacy benefit management: managing drug benefits for 65+ million people), and Optum Insight (health data analytics, technology, and consulting for health plans, providers, and government). With $226 billion in annual revenue in its own right (making Optum larger than most standalone health companies), Optum generates approximately 50% of UnitedHealth Group's total revenue and is the largest health services company in the world.
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