Blue J develops an AI tax research platform for accountants, tax advisers and other tax professionals. Its generative AI system answers tax questions and supports research, analysis and drafting with citations to primary authorities and specialist content including Tax Notes and IBFD. It is designed to help professionals evaluate relevant sources and apply their own judgment to complex tax issues. Founded in Toronto in 2015, Blue J serves tax firms in the United States, Canada and United Kingdom; its generative tax research product launched in 2023.