Sergei Filonov
Cofounder and CEO, Actogram
In Russian Сергей Филонов, also spelled Sergey Filonov.
Sergei Filonov is a serial entrepreneur who has been starting companies since 1992. He cofounded Actogram, which reads the daily rhythm of rest and activity from ordinary step counts, for watches, wearables and sleep research.
Now
At Actogram Sergei works with Tim Pyrkov and a small team. The algorithm is small enough for a watch chip, and the same core runs in an SDK for apps and in Biobank MCP, an AI research assistant for NHANES, the US national health survey. In October 2026 Sergei and Tim present abstract LBA22 and poster F170 at Sleep Europe 2026 in Maastricht.
Before Actogram
- Gero, cofounder and Chief Visionary Officer2015 to 2019A longevity biotech company he cofounded with Peter Fedichev and Maxim Kholin. It began in 2013 with a movement bracelet that he backed, and he later led its mobile health work.
- Eastern Peak, cofounder and early stage investor2010 to 2018Custom software development for young companies and large enterprises.
- inTaxi, cofounder2010 to 2013One of the largest taxi apps in Russia, in more than 50 cities.
- Aviamarket, cofounder and CEO2003 to 2013A heliport near Moscow with a pilot school and maintenance services. About 200 helicopters were sold over ten years, and in 2014 the company was acquired by NDV Group.
- Russian Web Resources, cofounder2001 to 2003International online services, among them frog.ru and unipart.com.
- Future Telecom, cofounder and CEO1997 to 2001Two pager brands in Russia with 700,000 units sold.
- Information Industry, cofounder1992 to 2001Wireless telecom infrastructure and equipment.
Flying
As a child Sergei dreamed of flying. In 2009 he came up with the idea of the first transatlantic flight by amateur pilots and flew it as one of the four pilots. Three Robinson R44 helicopters went from Redlands, California to the Istra airfield near Moscow, 15,700 km over 10 countries.
In February 2010 the Russian Helicopter Sport Federation gave the pilots its highest award, the medal For Contribution to the Development of Helicopter Sport.
Education
Bauman Moscow State Technical University, Informatics and Control Systems, 1987 to 1991. Before that Moscow School No. 2, a school for physics and mathematics.
Interests
Popular science, science fiction, nature, archery and anything to do with space.
In the press
- The story of Gero and its founders. Inc. Russia, 2021, in Russian
- The transatlantic helicopter flight. Forbes Russia, 2009, in Russian
- The medal for the flight. Russian Helicopter Sport Federation, 2010, in Russian
- Abstract LBA22 and poster F170. Sleep Europe 2026 programme