"I am one of the most hated people in the industry. I'm bad for business."
In a country with roughly 24,000 Medicare plans, the most valuable thing you can hand a 67-year-old is a straight answer. That is the entire business Cobi Blumenfeld-Gantz is in. Chapter, the company he started in 2020 and now runs as CEO, is an AI-powered platform that tells seniors which Medicare plan actually fits them - not which one pays the fattest commission. In April 2026 it raised a $100 million Series E led by Al Gore's Generation Investment Management, pushing its valuation to around $3 billion and capping a year in which revenue tripled past $100 million in annual recurring revenue.
The pitch is almost rude in its simplicity: most Medicare brokers are paid by insurers, so they are quietly motivated to steer you toward the plan that pays them best. Chapter flips the incentive. Its advisors are free to recommend whatever is right. That single design choice is why a 220-person startup near Union Square keeps winning customers - and why Blumenfeld-Gantz cheerfully accepts the title of Medicare's "most hated" man.
It started with two customers: his parents
The founding story is not a whiteboard insight. It is a kitchen-table mess. When Blumenfeld-Gantz's own parents tried to enroll in Medicare, they hit a wall of faxes, phone trees, and trips to the Social Security office, then took advice from a traditional broker that turned out to be wrong. They became the first two people Chapter ever helped - the company essentially began as a son fixing his parents' coverage mistakes.
That detail matters more than any market-size slide. He has said the goal is to build the products he wishes his parents had at the start of retirement, so that every senior can hold onto their "health, wealth, and purpose." The phrase shows up in his funding announcements, but it reads less like a tagline and more like a grudge against a system that nearly cost his own family.
I started Chapter because the Medicare enrollment and navigation process is broken, and consumers deserve better.- Testimony, U.S. Senate Finance Committee, October 18, 2023
Diplomacy, then Palantir, then this
The résumé does not look like a healthcare résumé, which is part of the point. As a college sophomore in 2009, he co-founded Dorm Room Diplomacy with Corey Metzman - a program connecting students in the United States and the Middle East through video dialogue. The project earned a Kathryn Wasserman Davis Project for Peace award. The instinct there - lowering the friction between people who do not understand each other - is the same instinct now aimed at seniors and insurance companies.
He studied Business Economics and History at the Wharton School and the University of Pennsylvania, then earned a Master's in Public Policy at the University of Cambridge as a Thouron Scholar. From there he landed at Palantir Technologies as a forward-deployed engineer leading U.S. government teams through their thorniest data problems. The Palantir years explain a lot about Chapter: a comfort with messy, high-stakes public data, and a belief that the right software can untangle a system everyone else has given up on.
A valuation that keeps doubling
The Series E was led by Generation Investment Management, with new backers Fifth Down Capital and 8VC joining existing investors Stripes, XYZ Venture Capital, Addition, Narya Capital, Susa Ventures, and Maverick Ventures. As one investor put it, Chapter "earned the trust of American seniors by building a data and AI platform that provides accurate information and impartial advice in an industry largely devoid of either."
An unusually political cap table
It is a rare thing for one startup to share a story with both a sitting Vice President and the founder of an Al Gore fund. Blumenfeld-Gantz frames the bipartisan footprint as proof, not paradox: he argues that anyone who has actually worked inside government - across parties - understands just how broken these systems are, which is exactly why Chapter's mission lands on both sides of the aisle.
Proud to be "bad for business"
Most founders dodge the word "hated." Blumenfeld-Gantz leans into it. The Medicare brokerage world runs on commissions, and a company that pays advisors to recommend the cheapest, best-fit plan is, by definition, a threat to everyone whose paycheck depends on the opposite. He has put the annual cost of Medicare fraud at more than $100 billion and treats that number as the size of the problem worth attacking.
His comfort with being disliked is strategic. In an industry where trust is the scarce resource, being the company that profits least from confusion is the strongest possible signal. The more the incumbents resent him, the better his marketing works. Chapter's newest framing - "the trust layer between seniors and technology in the age of AI" - is a bet that as more of retirement gets automated, the company that refuses to play the commission game becomes the default front door.
Our mission is to ensure every senior is able to preserve their health, wealth, and purpose.- Cobi Blumenfeld-Gantz
Things that don't fit the pitch deck
In his own words
Blumenfeld-Gantz on Medicare complexity, the $100B fraud problem, and how technology can fix it - in conversation on the World of DaaS podcast with Auren Hoffman:
▶ Chapter CEO Cobi Blumenfeld-Gantz - Medicare Complexity, $100B Fraud & How Tech Can Fix It ↗