OpenEvidence Cofounder Daniel Nadler Is Now A Billionaire
While at Harvard, Nadler studied evolutionary biology and became fascinated with the idea of trying to predict the future. He started a company called Kensho that used AI to predict the impact of events like terrorist attacks or natural disasters on financial markets, eventually selling it to S&P Global for $550 million in 2018. But Nadler had always been interested in healthcare and saw the enormous potential for AI to help doctors sift through the mountains of medical research to provide better care for patients.
With OpenEvidence, Nadler is now revolutionizing the way doctors access and interpret medical information. The software has become an indispensable tool for physicians across the country, allowing them to quickly find the most up-to-date research on a particular disease or treatment option. By providing doctors with accurate and reliable information, OpenEvidence is helping to improve patient outcomes and reduce the burden on overworked healthcare professionals.
The company’s rapid growth and success have attracted the attention of investors, with its latest funding round valuing OpenEvidence at $3.5 billion. This is a testament to the groundbreaking work that Nadler and his team are doing to transform the healthcare industry and make life easier for doctors and patients alike.
As OpenEvidence continues to expand its reach and influence, it is poised to become a major player in the healthcare technology space. With its innovative approach to using AI to streamline medical research, the company is paving the way for a new era of healthcare where doctors have access to the information they need to provide the best possible care for their patients. Daniel Nadler’s vision and determination have truly set OpenEvidence apart as a leader in the field, and the future looks bright for this game-changing company. Daniel Nadler is a remarkable individual who has achieved success in both the academic and entrepreneurial worlds. After obtaining his Ph.D. in political economy, with a thesis focused on credit derivatives, he delved into the world of poetry and technology, all while serving as a visiting scholar at the Federal Reserve. It was during his time as a grad student, surviving on a modest income, that he conceived the idea for his first company, Kensho.
Kensho, founded in collaboration with programmer Peter Kruskall, aimed to revolutionize financial analysis by utilizing algorithms to simplify the process. Their text-based chatbot, Warren, was a breakthrough in artificial intelligence at a time when the concept was still in its infancy in the startup scene. The success of Kensho, culminating in its acquisition by S&P for a staggering $700 million, marked a turning point in Nadler’s career.
In 2021, Nadler joined forces with Harvard Ph.D. student Ziegler to create OpenEvidence, a groundbreaking AI technology designed to assist doctors in their decision-making process. Motivated by personal experiences of medical errors and family health crises, the duo recognized the potential for AI to revolutionize healthcare. Their partnership attracted the attention of seasoned investors such as Jim Breyer, who saw the brilliance in applying AI to medical journals.
OpenEvidence’s participation in the Mayo Clinic’s accelerator program further validated the startup’s potential, allowing them to refine their technology using the hospital’s vast dataset. As AI continued to gain momentum, Nadler’s expertise in the field positioned OpenEvidence as a frontrunner in the healthcare AI sector. The startup’s reliance on reputable medical knowledge sources and commitment to accuracy set it apart from other AI-based platforms.
Despite concerns about the reliability of AI-generated information, OpenEvidence’s focus on quality and relevance has garnered praise from medical professionals like Dr. Stephen Krieger. The platform’s ability to provide accurate summaries and insights, even in areas beyond a physician’s expertise, highlights its potential to enhance patient care.
While skeptics like Dr. Daniel Byrne caution against relying solely on AI for medical decision-making, OpenEvidence’s medical director, Dr. Travis Zack, believes that the platform’s benefits outweigh the risks. By reducing errors and providing doctors with valuable insights, OpenEvidence empowers healthcare professionals to make more informed decisions.
As OpenEvidence explores new revenue models, such as sponsored answers from pharmaceutical companies, the startup aims to balance profitability with providing a valuable service to clinicians. By leveraging feedback from users to improve search results and refine their algorithm, OpenEvidence continues to evolve and adapt to the ever-changing healthcare landscape.
Daniel Nadler’s journey from academia to entrepreneurship exemplifies the transformative power of AI in healthcare. With a strong foundation in technology and a passion for making a difference, Nadler and his team are poised to revolutionize the way medical professionals access and utilize information, ultimately leading to improved patient outcomes. OpenEvidence, a groundbreaking healthcare technology startup, is revolutionizing the way doctors access and utilize medical research. Founded by Daniel Nadler and his team, OpenEvidence has created a “fantasy flywheel” where having more users improves the product, attracting even more users in a continuous cycle. While healthcare and pharma ad spending reached $30 billion in 2024, OpenEvidence stands out as a rare ad-based business in the healthtech industry, which typically relies on subscription models.
Despite the stigma surrounding advertising in healthcare, Nadler is a firm believer in its potential. With a vast inventory of ads worth over $350 million, OpenEvidence is following in the footsteps of tech giants like Google, gradually introducing users to the concept. Dr. Aneesh Singhal, vice chair of Massachusetts General Hospital’s neurology department, attests to the tool’s growing popularity among his colleagues. He praises OpenEvidence for its ability to streamline research tasks that would typically take hours to complete, providing valuable insights and recommendations for medical professionals.
As OpenEvidence continues to gain momentum, investors like Breyer are impressed by its rapid expansion among doctors. The startup’s latest feature, DeepConsult, utilizes reasoning models to enhance research capabilities and connect disparate studies seamlessly. By focusing on healthcare and prioritizing access to quality care, OpenEvidence aims to establish itself as the go-to platform for medical professionals worldwide.
Coatue cofounder Thomas Laffont envisions OpenEvidence evolving into a central hub for various AI-powered healthcare tools, streamlining the diagnostic process and improving patient outcomes. With a focus on innovation and collaboration, OpenEvidence is poised to revolutionize the healthcare industry, bringing together cutting-edge technology and medical expertise to drive positive change.
In a world where AI is transforming healthcare, OpenEvidence is leading the charge towards a more efficient and integrated approach to medical research and diagnosis. With a commitment to excellence and a dedication to improving patient care, OpenEvidence is setting a new standard for healthcare technology innovation.



