On (also known as On Running) is a Swiss sports brand headquartered in Zurich, founded in January 2010 by three-time World Duathlon Champion Olivier Bernhard, multiple Ironman winner David Allemann, and Caspar Coppetti, who holds a doctorate in economics. The trio formally established the company to develop a product range fully engineered in Switzerland using the latest technology, with one simple mission: make running fun.

At the heart of On's product identity is its patented CloudTec sole, which provides a soft landing before engaging to offer a powerful take-off — the sensation that gave the brand its signature "running on clouds" feel. Shoe models also feature the Speedboard, a thermoplastic polymer plate sitting between the upper and midsole that helps absorb and redistribute footfall energy back into takeoff.

Growth has been dramatic: On is the fastest-growing running shoe brand in the world, available at more than 2,200 specialist running stores across 50 countries, and its shoes have reached more than seven million runners worldwide. High-profile endorsements accelerated this rise — Roger Federer became a fan and eventually invested in the brand in 2019, joining its leadership team and helping launch a tennis-inspired lifestyle shoe category called "The Roger."

Sustainability sits at the core of On's strategy: the brand only uses vegan fabrics in footwear and is developing fossil-free materials, recycled fibers, and bio-based materials, including CleanCloud soles made from captured carbon emissions. Its Cyclon subscription service delivers 100% recyclable shoes made from castor beans, shipped every six months as part of a circular business model. On has become a genuine challenger to Nike and Adidas in the global performance and lifestyle footwear market.