Function Health vs Kareo
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.
Merged with PatientPop → Tebra 2021; $222M funding; $1B+ valuation; $72M 2023 (Golub); 100K providers; 90M patients; 1,000 employees; practice management/EHR leader
About
Kareo was founded in 2004 by Dan Rodrigues to build purpose-designed practice management and billing software for independent physician practices — a segment underserved by legacy healthcare IT vendors focused on hospital systems. The platform addressed the full administrative workflow of a small medical practice: appointment scheduling, patient registration, insurance eligibility verification, charge capture, medical billing, and accounts receivable management. Kareo also developed an integrated EHR module, making it one of the few vendors to combine clinical documentation and practice management in a cloud-native platform accessible to solo practitioners.\n\nKareo's products included Kareo Billing for RCM, Kareo Clinical for EHR and documentation, and Kareo Engage for patient communication and online reputation management. The platform served primary care, mental health, physical therapy, and chiropractic specialties. Its cloud-based delivery — accessible via browser and mobile without on-premises infrastructure — resonated strongly with independent practices managing lean overhead. A managed RCM service and QuickBooks integration rounded out the offering.\n\nKareo merged with PatientPop, a digital practice growth platform, in 2021 to form Tebra — targeting the full lifecycle of independent practice management from marketing through billing. The combined company has raised $222 million in total funding, achieved a $1 billion+ valuation, and serves over 100,000 providers across 90 million patients. Tebra continues operating the Kareo brand for billing and EHR while integrating PatientPop's digital presence capabilities into a unified independent practice growth platform.
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