A physics-and-philosophy mind who scaled a solar startup to $30M, then bet his whole career on the harder problem.
Most founders chase a market. Zack Gray chased a problem that scared most people off, wrote it down on a single page, and decided the thing simply had to exist.
Listen to the market, but as long as you're seeing positive signal at each step, keep going.- Zack Gray
The pivot from solar to founder was not a sideways step. Gray left a working business and an MBA pedigree to start a company in one of the most heavily regulated corners of the economy. The bet was that the bottleneck in this market was not science or technology, but access: the rules, the licensing, the friction that keep a good model from reaching the people who need it. Gray became convinced that a digitally native, telemedicine-first company could route around that friction.
He has been blunt about the philosophy underneath the company. Gray argues that private capital, deployed well, can do more good than charitable capital, because a venture-backed company is forced to build something durable, repeatable, and large enough to matter. It is a contrarian line for a founder in a mission-heavy field, and it tells you how he thinks: incentives are a tool, not a dirty word.
The co-founder pairing reinforces the point. Griffel was a teacher in the orbit of Gray's business education. Founding a company alongside someone who once stood at the front of a classroom is its own quiet statement about how Gray learns: he tends to keep the people who sharpen him close enough to argue with daily.
Consider the syndicate that lined up behind him. The Series B was led by Tiger Global Management, the crossover fund that spent that era writing some of the largest and fastest checks in technology. Around it sat Menlo Ventures, General Catalyst, Refactor Capital, 640 Oxford Ventures, Interplay Ventures, and Elliot Cohen, the co-founder of PillPack, the pharmacy company Amazon bought. That last name matters more than its size on the cap table. Cohen had already built and sold a company that bent a slow, regulated, deeply analog industry toward something digital and consumer-friendly. His presence is a tell about the kind of operator Gray wanted in the room: people who had done the unglamorous work of making regulated care feel modern.
The pace tells its own story. The Series A landed in May 2021. The Series B, more than three times larger, closed roughly seven months later in December. Investors do not compress timelines like that unless the underlying numbers are moving in the right direction. For a founder who preaches "keep going as long as you see positive signal," it was the market handing back exactly the signal he had been chasing, in the form of term sheets.
Ophelia began as a one-page business plan. Gray wrote it, read it back, and decided the company had to exist.
He believes private, venture-backed capital can do more good than charity, because it forces something durable to be built.
He launched Ophelia with Mattan Griffel, a lecturer tied to Columbia Business School. The student kept the teacher.
Read it from the bottom up and it looks inevitable. Lived forward, every step was a fork.
Studies astrophysics and philosophy. Serves as a Columbia University-funded research scholar.
Joins a New York residential solar startup as employee #2. Runs growth, helps scale it to $30M in revenue.
Earns his MBA at The Wharton School. Is chosen to deliver the graduation speech.
Co-founds Ophelia with Mattan Griffel. The company is selected for Y Combinator.
Ophelia raises a $15M Series A.
Closes a $50M Series B led by Tiger Global, bringing total funding to about $68M.
Continues as co-founder and CEO of a roughly 360-person company.
Seven months between rounds. The Series B was more than three times the size of the Series A.
"The only difference between you and these people is that they've managed to put one foot in front of the other for longer."
"Make sure that you leave room in your life for other things."
Gray is the rare founder who is openly suspicious of building purely for profit, yet completely fluent in how profit gets things built. He talks about leaving room in life for things outside the work, which is not the usual founder swagger. It reads less like a slogan and more like a guardrail he installed on purpose.
There is a stubbornness in him that physics rewards: keep going as long as the signal is positive, and do not confuse noise for a verdict. He frames perseverance as the whole game, the difference between people being mostly a matter of who kept moving longer. Coming from someone who left a comfortable, growing company to start over in a hard market, it is not abstract advice.
It also helps explain why he chose this market at all. Plenty of founders with a Wharton MBA and a growth track record optimize for the easiest path to a large outcome. Gray went the other direction, toward an industry tangled in licensing, regulation, and friction, on the theory that the friction itself was the opportunity. If the bottleneck is access rather than science, then the company that removes the friction wins, and removing friction is a problem an operator can actually attack. It is a bet on his own discipline more than on luck.
The graduation speech is a small thing that says a lot. Wharton does not hand the microphone to the loudest person in the room. The honor tends to go to someone whose classmates trust to speak for them, which suggests Gray's appeal is not just to investors but to peers. He is, by all available evidence, a person other ambitious people choose to follow into a hard idea.
Gray's stated ambition is scale: to take a model that works and make it private, convenient, and affordable enough to reach people across the country, not just in the cities where good options already cluster. That is the whole reason the access thesis matters. A boutique that helps a few hundred people is admirable. A national platform that reaches everyone the old system left behind is a different order of thing, and it is the order Gray keeps pointing at in interviews.
The funding milestones are best read as permission slips rather than trophies. The $15M Series A bought the right to prove the model in more places. The $50M Series B, and the roughly $68M in total capital, bought the runway to do it without flinching at the regulatory headwinds that scare smaller players off. Gray's job now is the unglamorous middle of the story: turning capital into infrastructure, headcount into reliability, and a 360-person company into something that still feels like the one-page plan even as it grows past the point where any single person can see all of it.
If there is a through-line from the astrophysics classroom to the corner office, it is comfort with the long arc. Stars do not resolve on a quarterly cadence. Neither do hard companies in regulated markets. Gray seems to have made peace with that early, which is probably why he keeps repeating the same quiet instruction to anyone building something difficult: leave room in your life for other things, and as long as the signal stays positive, keep going. It is not the loudest founder philosophy on the market. It may be one of the more durable ones.