Blue J’s approach for scaling fast in complex, regulated domains

Traditional tax research starts by sifting through hundreds of sources before even beginning to interpret them. Tax professionals then spend hours parsing statutes, regulations, rulings, case law, and expert commentary to piece together how the rules interact and distill them into an answer.

Depending on the complexity of the question, this process can take hours, days, or even weeks—and still yield inconsistent or outdated results, with every missed nuance carrying real costs.

Blue J was founded in 2015 by tax law professors and practitioners who saw the need for better tools in tax research. Building on early explorations in leveraging AI for predicting the outcome of tax law cases, the team went on to develop a variety of products to support tax and accounting firms of all sizes.

When ChatGPT launched, Blue J saw an opportunity to create something new: combining advanced reasoning over dense regulations with structured retrieval to deliver expert-grade tax answers in seconds, complete with inline citations and source lists professionals can trust.

Within two years of launch, Blue J rolled out a tax research engine with GPT‑4.1 across the US, Canada, and the UK. They launched their first product just six months after ChatGPT’s debut, then iterated rapidly, learning from feedback and building a robust evaluation framework.

Today, more than 70% of users log in weekly, with a disagree rate of fewer than 1 in 700 responses. Blue J shared the lessons learned for breaking into a complex domain and scaling fast by making trust, accuracy, and speed non-negotiable.

“We moved quickly because we already knew the problem and how to solve it. OpenAI gave us the model quality we needed to make that expertise scalable.”

—Brett Janssen, CTO of Blue J

Leveraging domain expertise to build the solution no one else can

Scale trust through user feedback

In a field where rules shift and precision is everything, this closed-loop system is what keeps Blue J fast, trusted, and ahead of the market.