The pharmacist's engineer, off duty
He once helped make the pill bottle obsolete for people. Now he is doing it for the golden retriever asleep on your couch - one on-time refill at a time.
Most founders chase the shiny thing. Gavin Cotter went looking for the boring one: the chronic refill nobody remembers until the bottle is empty and the dog is overdue.
Koala Health, the company Cotter runs out of Boston, is a digital pet pharmacy. That sentence undersells it. The hard part of pet medicine is not the pill - it is the choreography around it: a prescription stuck inside a busy vet clinic, a pet parent who forgets the renewal, a chronic condition that needs the same dose every month for the rest of an animal's life. Koala's bet is that this choreography can be automated, coordinated, and made quietly reliable. Work directly with the vet. Work directly with the owner. Make running out of medication something that simply stops happening.
If that approach sounds familiar, it should. Cotter spent his formative years at PillPack, the mail-order pharmacy that pre-sorted human medications by date and time and turned the chaos of a kitchen-counter pill organizer into something you barely had to think about. Amazon bought PillPack in 2018. Cotter took the lesson with him: people do not want a pharmacy, they want to not worry. He simply pointed that idea at a different patient - one with four legs and no thumbs.
The founding story is less a lightning bolt than a reunion. Cotter and co-founder Jordan Smith met as early members of the PillPack team, where they learned firsthand how punishing it is to manage multiple medications at scale. When they decided to build Koala, they pulled in Stephen Hendel, formerly of Blink Health, as the third founder and head of product. Three operators who had already seen how this movie ends for humans, deciding to reshoot it for pets. They launched in October 2021.
Consider the shape of the problem Cotter chose. A dog with a heart condition or a cat managing a thyroid issue does not need a one-time prescription - it needs the same medication, on schedule, indefinitely. The pet parent loves the animal but is human: busy, forgetful, prone to discovering the empty bottle at the worst possible moment. The veterinarian, meanwhile, is buried. Clinics are busier than they have ever been, and the in-house pharmacy is often an afterthought bolted onto an already overloaded practice. Somewhere between the owner's good intentions and the vet's stretched hours, refills fall through the cracks. Koala's entire reason for being is to stand in that gap.
What makes the model interesting is that Cotter refused to pick a side. The easy version of a digital pet pharmacy treats the veterinarian as friction - something to route around with a slick consumer app. Koala does the opposite. It works directly with both the pet parent and the clinic, positioning itself as the fulfillment engine the vet never wanted to run. For the clinic, that means shedding the burden of storing and dispensing chronic medications in-house. For the owner, it means the prescription, the renewal, and the doorstep delivery all happen without a phone call. The vet stays in the loop on the medicine; Koala takes the logistics. It is a quietly diplomatic piece of design, and it is the kind of thing an operations engineer thinks of before a marketer does.
That instinct is the through-line of Cotter's career. At PillPack he watched a company take the single most mundane chore in chronic illness - sorting pills - and turn it into a product people loved precisely because they stopped having to think about it. The genius was never the pharmacy; it was the removal of anxiety. Amazon paid a reported near-billion-dollar sum for that insight in 2018. Cotter internalized it and reapplied it to a market with its own enormous, under-served base: the tens of millions of households that treat a pet as family and would happily pay for the certainty that the medication will simply be there.
He scaled the company deliberately. Koala opened in a few dozen states, ironed out the machinery, then expanded to all fifty by 2023. The 2025 Series B, led by Valspring Capital, was less a coming-out party than a refueling stop - capital aimed squarely at scaling chronic medication delivery rather than chasing a flashier story. For a founder whose product philosophy is "make it boring and reliable," a fundraise framed around exactly that is a fitting sort of validation.
Veterinary clinics are busier than ever, and many pet owners face long wait times. At Koala, we make staying on top of pet medications easier by working directly with both pet parents and their veterinarians. - Gavin Cotter, on why Koala exists
Cotter is a mechanical engineer by training - MIT, class of 2009 - before he is a CEO. That order matters. It shows up in the way Koala is built: the obsession is not the app's color palette, it is the unglamorous machinery of getting the right pill to the right pet on the right day. He went back to MIT for an MBA at Sloan, then spent years in operations roles where the scoreboard was throughput and reliability, not press clippings.
Koala's core team reassembled from PillPack alumni. When you have already shipped a hard idea once, the second time you bring the people who survived it the first time.
Cotter's pitch is not cheaper medication - it is never running out. He is selling the absence of a 9pm panic over an empty bottle.
Rather than route around overworked clinics, Koala plugs into them - removing the burden of in-house storage and fulfillment while keeping the vet in the loop.
A look at how the capital stacked up on the way to roughly $63M total.
The Series B was led by Valspring Capital - a vote that the unsexy work of refilling the family pet's prescriptions is, in fact, a real business.
Cotter does not run Koala alone, and the company's bench reads like a checklist of the exact disciplines a pet pharmacy needs. Each founder arrived with a problem they had already wrestled in a previous life.
Met Cotter as an early PillPack teammate and previously led software engineering at Wayfair. The technical half of the original partnership.
Joined as the third founder after a stint at Blink Health, where he ran strategic projects in the thick of digital pharmacy.
The operations engineer holding it together - MIT-trained, PillPack-tested, and allergic to the idea of a customer running out of medication.
It is a deliberately operator-heavy roster. Nobody on the founding line came to play with branding; they came because they had each, in their own corner of the medication world, seen how often the simple act of keeping someone supplied goes wrong. Koala is their second attempt at fixing it - this time for the patient who cannot make the phone call itself.
The koala is the mascot. The actual product is on-time refills and vet-coordinated prescriptions - about as warm and fuzzy as a spreadsheet, and that is the joke that works.
The whole founding crew traces back to PillPack, the pharmacy Amazon acquired in 2018. Koala is what happens when that talent goes looking for the next medication problem.
Two MIT degrees and a career in operations mean Cotter treats a pharmacy like a system to be tuned, not a storefront to be decorated.
The market Koala is chasing is vast and deeply ordinary: the pet parents who just want the meds to show up before they run out.