Former top antitrust chief launches AI tool to help sue Big Tech

Jonathan Kanter ran the Justice Department's Antitrust Division until 2024. Now he has started a company that sells AI to people building cases against powerful corporations. It is called FluxCap, and he launched it with Doha Mekki, a former acting chief of the same division. The pitch is that a small legal team can get the muscle of a much bigger one.

What the tool does

FluxCap is a research and analysis tool for lawyers. It runs on the company's own technology plus existing large language models, the kind of AI behind chatbots. It is trained to spot the facts and legal rules that decide whether a case succeeds, then look for holes in an attorney's reasoning.

It also helps with discovery, the stage where each side hands over huge piles of documents. FluxCap searches them for signs a company acted to block rivals. Kanter says teaching it to find that evidence was one of the hardest parts, because executives rarely admit to being monopolists. Context gives messages their meaning.

He points to the Live Nation-Ticketmaster trial. A customer testified that a call from the Live Nation CEO, who mentioned a new arena that could make it harder to deliver concerts, felt like a "not-so-veiled" threat.

Why it was built

Government lawyers are badly outnumbered. Congress gave the whole Antitrust Division $245 million for fiscal year 2026, and it has more than 400 attorneys. Its targets have market values in the billions or trillions and large legal teams. State attorneys general have even less. Kanter says a large one might have 10 people on a case.

Kanter says FluxCap gives a small team the output of roughly "20-plus people working around the clock." That is his claim, not an independent test. He also says general chatbots and legal software do okay on antitrust questions but "miss the nuance."

Who is using it

• The team includes former DOJ staffers and former Palantir engineers.
• Antitrust firm Kressin Powers is one of its first customers.
• Kanter says it is in talks with public and private enforcers.

What is not known yet

No court results from FluxCap have been reported. The article does not give a price or say how many customers it has. Kanter himself says technology cannot fully level the field. In his words, government "desperately" needs more funding and more staff.

What happens next

FluxCap is starting with antitrust and plans to move into other areas of law. If it works as promised, cases against big companies could become easier to bring. That could mean more competition and, over time, better prices for ordinary customers. For now, it is a promise from the people selling it.