Company leader
Daniel Nadler
Founder and CEO
OpenEvidence
Daniel Nadler is founder and chief executive of OpenEvidence, a Miami, Florida company whose AI search engine answers doctors' clinical questions with citations to peer-reviewed research. Before OpenEvidence he co-founded Kensho, an AI company for financial analysis that S&P Global bought in 2018.
Growing Up in Toronto
He grew up in Toronto, Canada, where his parents settled after emigrating from Romania and Poland. His grandfather survived Auschwitz. He earned a bachelor's degree at the University of Toronto.
Graduate Years at Harvard
At Harvard he earned a PhD in political economy, with a thesis on how credit derivatives are priced. He also studied poetry under the Pulitzer Prize winner Jorie Graham and served as a visiting scholar at the Federal Reserve, where he was surprised to find regulators making critical assessments in basic spreadsheets.
Building Kensho
While still a graduate student he teamed up with the programmer Peter Kruskall to start Kensho, which built software to make financial analysis as easy as a web search. S&P Global bought Kensho in 2018 for $550 million.
Founding OpenEvidence
He founded OpenEvidence in November 2021 with Zachary Ziegler, then a machine learning PhD student at Harvard. His own grandfather had died after a medical error. He put about $10 million of his own money into the company before raising outside funds, and in 2023 OpenEvidence joined Mayo Clinic's accelerator for health technology startups.
OpenEvidence is free for verified clinicians and earns its money from advertising, much of it from drug companies. Its search ranks papers from journals such as the New England Journal of Medicine and JAMA, and each answer cites the studies behind it. Forbes reported in July 2025 that doctors were running about 8.5 million consultations a month through it.
Life in Florida
He lives in Surfside, Florida.