Founder loneliness and the co-founder relationship. The human side nobody warns you about.

Build with someone who closes your gaps

The partnership worked, for as long as it did, because it was built on complementarity from day one. For the first ten years the division of labor was clean and deliberate: I owned product, engineering, and operations; he owned sales and marketing. We were aligned around our actual strengths, not our egos, and neither of us wanted the other's job.

It evolved, too. After about ten years we implemented EOS, and our roles shifted to match it. My partner became the strategic visionary — running our largest customer relationships, the big sales deals, the investor conversations, and serving as the primary communicator of vision to the team. I became the integrator, with every function — sales, marketing, product, engineering, support, operations — reporting into me. Same complementarity, new shape.

But the deepest part of the fit is the part almost nobody talks about: we have opposite personalities. I'm more reserved and introverted; he's more outgoing and extroverted. When founders are told to find a co-founder who "closes the gap on their skills," that's correct but incomplete. Pick someone whose temperament is the inverse of yours too. The sum of the parts is what makes up the whole, and a partnership of two of the same person is just one person with more overhead.

The 3,000-mile mistake

Here's the honest part, and the thing I'd undo if I could. For most of the company's life we ran it from opposite coasts — him in Seattle, me in Philadelphia — with different team members and different functions in each location. It was messy. Decisions that should have taken a hallway conversation turned into scheduled calls. Context that should have been shared in passing got lost. And slowly, that distance did what distance does to any important relationship: it let small misalignments harden into real ones.

I believe our biggest mistake as partners was simply not being in the same room. There was a genuine low point in the relationship, and when I look back at what caused it, it wasn't a clash of values or a betrayal of trust — it was the steady erosion of running a growing, high-stakes business from 3,000 miles apart. The problem wasn't who we were. It was where we were.

Moving across the country to save it

So I moved. For the last five years of the business I relocated to Seattle, timed with our new alignment around EOS, and it helped the relationship enormously. Being in the same room changed everything — the casual context, the read on each other's mood, the ability to work through a hard decision face to face instead of across a video call and three time zones. Some problems a founder partnership faces aren't really disagreements at all; they're distance wearing a disagreement's costume.

I don't say this to claim everyone must be co-located — plenty of partnerships thrive remotely. I say it because we learned the cost of distance the hard way, and because founders rarely weigh proximity as the structural decision it actually is. If you're choosing to build apart, go in clear-eyed about what it will cost the relationship, and over-invest in closing that gap long before it becomes a fracture.

A partnership is a relationship

The most useful way I've found to think about a business partner is that it's like any other important relationship in your life — a close friend, a spouse. There will be disagreements. There will be ups and downs. What gets you through them isn't avoiding conflict; it's empathy and the willingness to actually work through it, the same way you would with anyone you intend to be bound to for years.

When I ask myself what kept ours intact for sixteen years, it's a short list: shared values, an enormous amount of time invested, a lot to lose, and — honestly — no great alternatives to staying. But underneath all of it was mutual respect, and a habit we never broke of bringing each other into the major strategic decisions each of us owned. He didn't make the big calls in my domain without me, and I didn't make them in his without him. That respect is what let the same alignment carry us all the way to an exit that felt like a non-event — two partners, still in sync, deciding together that it was time.

The loneliness a co-founder relieves

I coach founders now, and some of them are building without a co-founder. Watching them, it's become obvious to me how lucky I was. Entrepreneurship is a genuinely lonely place, and a co-founder is the one person who relieves a particular slice of that loneliness — because they're the only person you can be completely honest with.

There are things a founder simply cannot say to the rest of the team: the real state of finances, the anxiety about making payroll, a deal that's slipping, the cost reductions you're quietly modeling. Carrying all of that with no one to share it with is corrosive. A co-founder is the person on the other side of that wall. If you have one, don't take it for granted. And if you're solo and can't bring one in, my best advice is to let your leadership team play that role — it isn't the same, but it's a surprisingly decent proxy for most of the decisions, and the weight, that would otherwise sit only on you.

Sustaining yourself — and the takeaway

The partnership is half of it; the other half is keeping yourself whole. For me that was almost embarrassingly simple: exercise, and my dogs. Running three or four times a week was what kept me on an even keel — it cleared my head, held my perspective steady, and made me a better problem-solver and a better leader than I'd have been white-knuckling it at a desk. The human maintenance isn't a luxury you get to once the business is sorted. It's part of how the business stays sorted.

So if you're choosing a co-founder, here's what I'd tell you: pick someone who closes the gap on your weaknesses and your skill set — if you're strong in sales and marketing, find someone strong in product and engineering, or the inverse — and pick someone whose personality is the opposite of yours. And if you can't bring in a co-founder at all, build a leadership team that plays the part. The rarely-written truth is that the human side — the partnership, the loneliness, even the distance on a map — is every bit as central to whether you make it as any number on your dashboard. The metrics get all the attention. This is the part that actually decides whether you're still standing at the end.