Ask Blue J is a generative AI–driven tax research platform developed by Blue J. It enables tax professionals to pose natural-language tax law questions and receive answers that include linked primary sources, commentary, and related legal content. The tool supports efficient and verifiable tax research workflows in U.S. federal tax law (and evolving jurisdictional coverage).

Key Features & Functions include:

Natural-language query interface
Users may ask tax questions in conversational language. The AI engine interprets the intent and returns structured responses with citations to relevant statutes, regulations, or rulings. 

Cited sources & verifiability
Each answer is accompanied by links to underlying primary materials (e.g. tax code sections, IRS rulings) and a summary of related content, enabling users to validate or further explore the reasoning. 

Case law integration
As of version 14, Ask Blue J includes curated federal tax case law, enabling precedent-based reasoning within responses. 

Performance optimizations
The v14 release claims substantially improved response speed (roughly “2× faster”) over prior versions, enhancing usability for real-time research work. 

Jurisdiction expansion & future roadmap
While initially focused on U.S. federal tax, Blue J plans to broaden jurisdictional coverage and deepen drafting, review, and API integration capabilities to leverage firm data.

Funding Information:
Blue J has raised a total of $140 in funding over 9 rounds. Past rounds include: 

• August 4, 2025 - Series D of $122M led by Oak HC/FT and Sapphire Ventures, with participation from Intrepid Growth Partners, and previous investors Ten Coves Capital and CPA.com.
• Dec 17, 2024 - Series C funding of an undisclosed amount from Ten Coves Capital.
• Aug 11, 2021 - A total of $9M in Series B funding led by Generation Ventures and including participation from Relay Ventures, Mistral Venture Partners and LDV Partners.
• Apr 14, 2020 - A grant of $2M from CIBC Innovation Banking.
• Nov 29, 2018 - $6.7M  in Series A funding from Relay Ventures, Mistral Venture Partners, LDV Partners, and Business Development Bank of Canada.
• Feb 1, 2017 - A seed round of an undisclosed amount from Mistral Venture Partners.
• May 9, 2016 - An undisclosed amount of pre-seed funding from UTEST, Toronto Innovation Acceleration Partners, and NEXT Canada.
• Oct 10, 2015 - An undisclosed amount of funding.
• Jan 1, 2015 - A pre-seed round of an undisclosed amount.