Function Health has reached a valuation of $2.5 billion following a $298 million oversubscribed Series B round led by Redpoint Ventures, positioning the Austin-based company among a select group of global healthtech unicorns. With hundreds of thousands of members and more than 50 million completed lab tests since 2023, the company is expanding its mission to redefine preventive health by launching a Medical Intelligence Lab and introducing new AI-driven tools for personalized care.
Founded to help people live 100 healthy years, Function began by popularizing a membership that provides more than 160 lab tests, giving individuals a detailed view of their biology. The company later accelerated its vision through the acquisition of Ezra, enabling it to offer advanced MRI and CT scans at scale. To broaden access, Function is lowering its annual membership fee from $499 to $365, making its comprehensive testing platform available for $1 per day.
The Medical Intelligence Lab (MI Lab), co-directed by Chief Medical Scientist Dan Sodickson, MD, PhD, brings together leading clinicians, technologists, and researchers. While AI alone cannot fully interpret the complexity of human biology, Function integrates it with medical research, imaging, lab data, wearables, IoT signals, and clinical expertise to create a unified system that identifies patterns, early signals, and health trajectories that traditional reactive care often misses.
As the company expands, members will receive early access to new AI capabilities that leverage integrated health data. These include Private AI Chat for personalized, context-aware medical explanations; Protocols that convert complex data into actionable daily steps; and an Upload Health Records feature enabling users to integrate external medical history into their accounts.
Function is simultaneously strengthening its leadership team. New appointments include Dr. Sodickson as Chief Medical Scientist and Co-director of the Medical Intelligence Lab, Tiffany Lester, MD, as Women’s Health Medical Director, and Neil Shah as Chief Operating Officer following his tenure scaling Slack.
The Series B, which brings together prominent investors such as a16z, Aglaé Ventures, Battery Ventures, NFDG, QuantumLight, Samsung Next, Redpoint, and a wide range of athletes, entertainers, and founders, will support the company’s Medical Intelligence initiatives and global expansion. With its expanded AI capabilities and new leadership, the company is positioning itself as an intelligence layer for human health, aiming to transform how people detect disease, understand their bodies, and make informed decisions about lifelong wellness.
Function states that integrating lab testing, imaging, and continuous learning models will create a more proactive health system that reveals early warning signs before symptoms occur. As the company advances its Medical Intelligence platform, it aims to provide a comprehensive, real-time understanding of human biology to help prevent avoidable suffering and enable better health outcomes worldwide.
KEY QUOTES:
“Function is the most powerful approach I’ve seen in my career as a doctor. It delivers uncompromising depth with no shortcuts. This is the new standard for health.”
Mark Hyman, MD, Chief Medical Officer and Co-Founder at Function and former Cleveland Clinic physician
“This is bigger than any company or trend. Function’s MI Lab and Medical Intelligence introduces a new chapter in human health. This is the most important application of AI—helping people avoid suffering and preventable death.”
Jonathan Swerdlin, CEO and Co-Founder of Function
“We’ve spent decades waiting until people are sick to act. Function changes that. Medical Intelligence connects important signals — from blood to imaging to wearables — creating a continuously learning model of your health. It’s not AI replacing doctors; it’s clinical expertise amplified by intelligent systems that never stop learning.”
Daniel K. Sodickson, MD, PhD, Chief Medical Scientist and Co-director of the Medical Intelligence Lab
“Once I saw what Function can do, it felt irresponsible as a father and husband not to use it. And I had to invest.”
Elliot Geidt, Managing Director, Growth at Redpoint
“Function is building the intelligence layer for human health. This is where technology, data, and medicine converge — turning years of fragmented health information into clarity and action. Function isn’t just leading a new category in health; it’s setting the standard for how we understand, manage, and ultimately extend human health.”
Daisy Wolf, Investing Partner at Andreessen Horowitz and Board Member at Function
“Function allows consumers to take their health into their own hands — putting power back where it belongs, helping turn medicine from reactive to proactive, and sparking a movement around better everyday health. At a16z, we’ve been proud to back the team from the very beginning as they build the future of preventative health care.”
Bryan Kim, Partner at Andreessen Horowitz
