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About
Blue J was founded in Toronto in 2015 as Blue J Legal by three University of Toronto law professors — Benjamin Alarie (CEO), Anthony Niblett, and Albert Yoon — together with founding CTO Brett Janssen. The premise: tax law is data, and machine learning can predict how courts will rule. The company spent its first eight years selling prediction tools like Tax Foresight to accountants and lawyers. In January 2023, Alarie put those products — several million dollars of recurring revenue — into maintenance mode and gave the team six months to rebuild the company around generative AI. The bet worked. Ask Blue J, a conversational tax research platform grounded in legislation, case law, rulings, and licensed content from Tax Notes and IBFD, serves tens of thousands of tax professionals across more than 4,000 firms in the US, Canada, and the UK as of July 2026 (per bluej.com; 2,500+ organizations at the August 2025 Series D), including KPMG, RSM, and Crowe. Blue J grew 360% in 2024 and more than 250% in 2025, and in August 2025 announced a US$122M Series D led by Oak HC/FT and Sapphire Ventures, valuing the company at over US$300M.
Backers
Oak HC/FT and Sapphire Ventures co-led the August 2025 Series D, with participation from Intrepid Growth Partners, returning investor Ten Coves Capital (which led the December 2024 Series C), and CPA.com, the business subsidiary of the AICPA.
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Quick answers
What does Blue J do?
Blue J applies AI to tax research. Tax professionals ask a question in plain language and Ask Blue J answers in about ten seconds, citing the underlying legislation, case law, and rulings so the answer is defensible. Coverage spans US, Canadian, and UK tax, with licensed content from Tax Notes and IBFD.
Who founded Blue J?
Three University of Toronto law professors — Benjamin Alarie (CEO), Anthony Niblett, and Albert Yoon — founded the company in 2015 as Blue J Legal, alongside founding CTO Brett Janssen. It grew out of Alarie's conviction, formed while overhauling U of T's first-year law curriculum, that AI was coming for legal research.
Why is the company growing so fast?
In January 2023 Alarie put Blue J's existing prediction products — several million dollars of recurring revenue — into maintenance mode and rebuilt the company around generative AI. Since the pivot: 360% growth in 2024, more than 250% in 2025, 226% net revenue retention, and a US$122M Series D announced in August 2025 at a valuation over US$300M.