Sergey Kotyrev
Founder of Umisoft (UMI.CMS) · Investor & Advisor to Co.Actor
CMS & SaaS pioneer · 25+ ventures as founder, investor, or advisor
Sergey co-founded Umisoft in 2007 — the software company behind UMI.CMS, a commercial content management system that has powered tens of thousands of websites across two decades. He has founded, backed, or advised 25+ ventures across web platforms, hosting, and SaaS, and is now an investor and advisor to Co.Actor.
How he helps Co.Actor
Co.Actor is a multi-site CMS built for the agent era — and Sergey has spent most of his career on the older version of that problem: making a commercial CMS survive contact with real customers, at scale, for years. He brings that operating pattern-matching to the team: where margins actually come from in SaaS, which platform decisions compound, and where founders typically waste a year on the wrong thing.
Track record
- Co.Actor · Investor & advisor · present
Working with the Co.Actor team on product positioning, SaaS pricing, and the operating discipline needed to scale an agent-native content platform. - Umisoft · Co-founder & CEO · 2007 – present
Software company behind UMI.CMS — a commercial content management system that has powered tens of thousands of websites across two decades. - UMI.ru · Co-founder · 2011 – present
Hosted website builder for small and mid-size businesses, built on top of the UMI.CMS engine. - 25+ other ventures · Founder / investor / advisor · ongoing
Backer, operator, or advisor across web platforms, hosting, SaaS, audio media, and consumer software — a portfolio built over two decades of operating experience.
Focus areas
CMS & platform architecture
Two decades of building and running a commercial CMS used at scale — what survives in production, what breaks under load, what really matters to customers.
SaaS economics
How to price a recurring product, where margins really come from, what cohorts to watch, and when to invest versus optimize.
Founder pattern matching
25+ companies as founder, operator, or investor. Useful for the kinds of decisions you only see clearly the second or third time around.
FAQ
Who is Sergey Kotyrev?+
Sergey Kotyrev is the founder of Umisoft — the software company behind UMI.CMS — and an investor and advisor in 25+ web and SaaS ventures. He advises Co.Actor on CMS architecture, SaaS go-to-market, and platform economics.
What is his relationship to Co.Actor?+
Sergey Kotyrev is an investor in and advisor to Co.Actor. He works with the team on product positioning, SaaS pricing, and the operating discipline needed to scale a content platform.
What is UMI.CMS?+
UMI.CMS is a long-running commercial content management system developed by Umisoft, the company Sergey co-founded in 2007. It has powered tens of thousands of websites and remains one of the established names in the commercial CMS market.