Benjamin Alarie is co-founder and CEO of Blue J, an AI-powered tax research platform serving more than 6,000 firms as of September 2026. He holds the Osler Chair in Business Law at the University of Toronto.

He has spent more than a decade applying artificial intelligence to tax and law. In 2016 he coined the term "legal singularity" in the University of Toronto Law Journal, arguing that artificial intelligence would eventually make legal reasoning far more predictable, coherent, and accessible. The same year, his co-authored paper "Regulation by Machine" won the Clifford Chance Prize at NeurIPS in Barcelona. Since then he has developed the thesis in two books and put it into practice at Blue J, which began as a commercialization of his academic work on machine prediction of legal outcomes.

Superjustice: Law in the Age of Artificial Intelligence (Oxford University Press, July 2026), co-authored with Samuel I. Becher, examines how AI can reshape public legal systems. The Legal Singularity: How Artificial Intelligence Can Make Law Radically Better (University of Toronto Press, 2023), co-authored with Abdi Aidid, won the 2024 Association of American Publishers PROSE Award in Legal Studies and Criminology and was shortlisted for the Donner Prize. He also co-authored Commitment and Cooperation on High Courts (Oxford University Press, 2017) and was a co-author of Canadian Income Tax Law through its sixth edition. His peer-reviewed scholarship on tax law, judicial decision-making, and the computational future of legal reasoning has appeared in the University of Toronto Law Journal, the Canadian Tax Journal, the British Tax Review, and the American Business Law Journal, among others.

He has held the Osler Chair since 2016, has been a full professor since 2018, and previously served as Associate Dean of the First Year Program from 2011 to 2015. He holds a BA in economics from Wilfrid Laurier University, an MA in economics from the University of Toronto, a JD from the University of Toronto, and an LLM from Yale Law School. He clerked at the Supreme Court of Canada for the Honourable Madam Justice Louise Arbour.

He is a Faculty Affiliate of the Schwartz Reisman Institute for Technology and Society at the University of Toronto. He lives in Toronto.