Everyone has bad days. Running a business can feel like a roller coaster you never agreed to ride. But rock bottom is different. When you hit it, you know.

Scroll social media on one of those days and everyone else seems to be winning, while you stand at the mirror counting everything going wrong. That is the hardest time to find strength, and the time you need it most. The nine founders below found theirs. Each faced a worst moment and channelled it into something that now helps other people.

Founders who built from their lowest point: turning the worst day into a company

Construction is the second-highest industry for suicide, after mining. Grant Gunnison knows the cost up close. He immersed himself into the work, he says, "after my dad took his life," building Zero Homes while confronting the problem inside an industry that rarely talks about it.

He had no illusions about how hard running a small contracting business would be. Three years in, a contracting partner pulled him into a bear hug at a holiday party, tears in his eyes, telling him how much being part of it meant. Build from a loss that personal, and you will outlast anyone in it for the money.

Becoming her own evidence

Mariela Hunter was at the peak of her career when she physically collapsed. The healthcare system sent her home with nothing, so she left the US and rebuilt herself through neuroscience, alone. "The hardest part was becoming the evidence first," she says, proving the method on herself before offering it to anyone else.

She turned that recovery into Cognitive OS, a training protocol for the brain, and applied it with 200 founders and executives. When a hedge fund manager told her it had measurably improved his decision speed and asked what it would cost to roll it out to his entire team, she had a business.

Alyona Mysko had a launch planned for her company, Fuelfinance, on the morning of 24 February 2022. Then Russia invaded Ukraine. "Half my team was in bomb shelters, half my revenue evaporated overnight," she says, and for two weeks she thought it was the end.

She and her team rebuilt the entire company over the next three months and came back bigger. The product had already proven its worth before the war, when a YC-backed company hit profitability within five months of using her early version and that CEO later became her co-founder. So when everything broke, there was something solid enough to rebuild on.

The firm he wished had existed

By 23, Kevin Leyes had lost close to $150,000 to online scams and impersonation attacks. The problem was how exposed his public data had left him, so he set out to build the company he had needed. "I went looking for a firm that could have prevented it, and realized one didn't exist," he says.

LeyesX sells prevention rather than the usual incident response, shrinking a client's digital footprint until attackers move on to easier targets. Billionaires and family offices started calling before anything went wrong, and he helped them avoid problems he had faced himself.

Built during his treatment

Maria Kardakova , a nutritionist and PhD researcher, watched her husband get diagnosed with a serious condition and receive zero guidance on how food could support his recovery. "If I didn't know where to start, what chance did everyone else have?" she says.

She built iCook while her husband was in treatment, raising two children, finishing her PhD and immigrating to a new country. The startup was the one thing she refused to drop, because it was the reason she started. She built it for the person she had been in that supermarket aisle, lost and afraid, and found that person was almost everyone.

What she made for her son

When Georgina Tang 's son went through chemotherapy, it left him with severe psoriasis and hair loss, and the medical treatments failed. So she made her own natural skincare and hair products, and they transformed his condition.

Other parents noticed how good her son's skin looked and started asking what she used, so she shared it with families going through cancer treatment. "I hadn't ever considered bottling it and selling it, I just wanted to help people," she says. YNNY is now a multi-award-winning, six-figure company. Sometimes the business finds you, once you have solved your own crisis.

The resource she couldn't find

An infertility diagnosis blindsided Kristyn Hodgdon in her late 20s, and she struggled to find trustworthy information about her own reproductive health. She quickly realised she was not the only one. "So many women feel this way when navigating major healthcare decisions," she says, "especially when they're scared or have had their concerns dismissed."

She built Rescripted to be the resource she couldn't find. Women started telling her they finally felt informed enough to advocate for themselves and ask better questions. The gap you fell into, with no one to catch you, is often the business itself.

Healing her own cycles first

Tiffiny Frances Hogg kept hitting what she calls The Wall, the burnout and breakdown that high achievers eventually meet. For her it ran deeper than strategy or mindset. "It's a nervous system and identity problem," she says, a system stuck in survival mode for too long.

Understanding the nervous system and how the body holds the past helped her heal her own cycles of burnout, breakdown and a Bipolar 1 diagnosis, and that became The Alignment Process. Heal the system that broke you, and you can teach others the way out.

Sarah Kagan built her work around something everyone experiences and no one wants to discuss, how people are treated as they grieve at work. She is, in her words, "doing it all for my mom."

When she floated changing the default bereavement leave from three days to a flexible three weeks, more than 200 people wrote in to back it, sharing how that support would have changed their lives as they navigated loss.

Strength found at rock bottom: how founders built from their worst moment

None of these founders asked for the moment that broke them. A death, a diagnosis, a collapse, a war, a loss they did not see coming. They sat at the bottom, watched everyone else seem to win, and found the strength to build anyway. That strength is in you too, on the days it feels furthest away. Channel the adversity into something that helps the next person standing where you stood.