The New York brand that fixed the one thing everyone hates about no-show socks: they slip off.
ONDO makes no-show socks that stay on your feet. That sounds almost too simple to build a company around, which is exactly why it worked. Founder Daniel Shim, who grew up between South Korea and the United States, spent four years at JP Morgan - the last two covering startups from a treasury desk - before quitting in September 2019 to obsess over an everyday annoyance nobody had solved: low-cut socks that slide off your heel mid-stride.
His first idea was to import Korean socks, after noticing his Korean friends bought socks from home while his American friends pieced them together from scattered sources. He scrapped it once he realized it wasn't solving a real problem. The real problem was grip. ONDO launched in October 2020, just as e-commerce was reshaped by the pandemic, and hit $100,000 in revenue by its second month.
The name means "temperature" in Korean and Japanese - both warm and cool at once. That idea of holding two opposites together runs through the brand: quality with affordability, style with sustainability, performance with comfort.
Most no-show socks try to grip with scattered silicone dots printed onto the fabric. ONDO's difference is mechanical, not marketing: a single wide silicone strip, cut and sewn flat into the heel. Reviewers testing it report no heel slip at all - the reason ONDO can offer a No Slip Guarantee, promising a refund if a pair slips.
Printed rubber dots peel and lose grip; the sock creeps down into the shoe.
One thick, flat strip cut-and-sewn into the heel keeps the sock locked in place all day.
ONDO's merino no-show sock blends Woolmark-certified Australian merino wool with performance nylon and a touch of spandex for stretch - engineered for temperature regulation, moisture-wicking, and a double-layered toe.
Composition per ONDO's merino wool no-show sock listing. Organic cotton styles use certified cotton blended with Aerolight and Aqua-X nylon.
Woolmark-certified Australian merino, silicone grip, double-layer toe. Sold in 4, 8, and 12-packs.
Core · 2020Certified organic cotton with Aerolight and Aqua-X nylon for moisture-wicking, in 10 colors.
Core · 2020A touch more coverage than the classic no-show, across seven colorways.
2021Longer crew socks with contour compression for support and everyday wear.
2023No-slip merino wool headbands and a merino baseball cap - the grip playbook, applied to accessories.
2022Grip socks tailored for studio floors, plus sock-shaped mesh laundry bags.
2023“Be very, very niche. Nike started with just shoes.” Daniel Shim, Founder & CEO of ONDO
Roughly 99.99% of ONDO's sales run direct-to-consumer through ondo.com, built on Shopify Plus, with a handful of SKUs on Amazon. There are no wholesale accounts and no retail stores - just multi-packs of premium socks and accessories sold at accessible prices, with a No Slip Guarantee to earn trust and repeat purchases.
The seasonality is stark: 35 to 40% of annual revenue arrives in the fourth quarter. Rather than fight it, ONDO plans the whole business - inventory, cash, hiring - around that holiday rhythm. And after early traction, Shim chose steady double-digit growth over hyper-growth, building in deliberate "plateau years" to reinvest in supply chain, operations, and team.
The customer base spans everyday wearers, gym and athleisure buyers, and gift shoppers. When Apple's iOS 14 update broke ad attribution across DTC, ONDO leaned harder on product quality and retention - the assets it actually controls.
One pair touches four countries: designed in New York, tested in South Korea, ethically made in Vietnam, and shipped from a warehouse in Pittston, Pennsylvania - traceable, as the brand puts it, from seed to sewn.
The American sock aisle is loud - Bombas and its donation model, Nike and the athletic majors, a swarm of DTC upstarts, and Amazon private labels underpricing everyone. ONDO's wedge isn't a cause or a price. It's a single functional promise most brands never nailed: a no-show sock that stays on, backed by a guarantee.
Daniel Shim quits finance in September to develop a better sock.
Debuts in October with no-show socks built around a patented silicone grip - and reaches $100K in revenue by month two.
Adds merino headbands, a cap, and holiday laundry bags, and closes a $2M Seed financing in December.
Launches contour compression crew socks and yoga/Pilates grip socks.
Ships to 33+ countries with more than 20,000 five-star reviews.
ONDO doesn't run an official channel we could verify, so these point to independent reviews and searches where you can watch the grip in action.
Sources include ONDO's own site, its LinkedIn page, and third-party coverage (Common Thread Co. founder interview, independent product reviews).
ondo.com · Common Thread Co. interview · LinkedIn · Effortless Gent review