Ex-DOJ antitrust chief Jonathan Kanter launches AI legal startup FluxCap

In short: Former DOJ antitrust leader Jonathan Kanter has launched FluxCap, a startup that sells an AI tool to help lawyers build antitrust cases.

What happened

Jonathan Kanter, who led the Justice Department’s Antitrust Division until 2024, is moving his work into the private sector. He and former acting Antitrust Division chief Doha Mekki have started a company called FluxCap.

FluxCap sells a legal research and analysis tool powered by AI. In simple terms, it is meant to act like a fast assistant that can read, sort, and summarize huge amounts of legal material, then point out strengths and weak spots in an argument. The company is starting with antitrust work, which is the area of law focused on illegal monopolies, and it says it plans to expand to other types of cases.

FluxCap’s team includes former DOJ staffers and former engineers from Palantir. Kanter told The Verge the tool is designed to help smaller legal teams take on much larger ones, and he compared its impact to adding “20-plus people working around the clock.” One early customer mentioned in reporting is the antitrust firm Kressin Powers.

Kanter said one hard part is teaching the system to find meaningful evidence in messy real-world communications. In antitrust cases, direct admissions are rare, so the tool needs to understand context, like how a sentence can act as a threat without saying it plainly.

Why it matters

Antitrust cases often involve mountains of documents and very expensive legal work. If tools like FluxCap actually help smaller teams review evidence faster and spot key details, it could make it easier for governments, states, and private plaintiffs to challenge powerful companies.

Source: The Verge AI