Founder Profile
Serguei Mourachov
Last reviewed: October 2026 · By Swet Parvadiya
Who is Serguei Mourachov?
Serguei Mourachov is a founder of Slack Technologies, LLC, which was founded in 2009 with Stewart Butterfield, Cal Henderson and Eric Costello.
- Company founded
- Slack Technologies, LLC
- Founded
- 2009
- Co-founders
- Stewart Butterfield, Cal Henderson and Eric Costello
Background
Software engineer.
Founding Story
Serguei Mourachov co-founded Slack in 2009. Another veteran of the Flickr engineering team, he played an absolutely vital role in building the early backend systems for the company's failed gaming venture, providing the technical foundation that was rapidly repurposed into the enterprise messaging app. (Exact birth year remains publicly undisclosed).
Sources
This profile does not yet cite a source specific to Serguei Mourachov. The sources below document the company company rather than the person, so check them against the claims above.
- Slack Announces Strong Fourth Quarter and Fiscal Year 2021 Results (Slack Technologies, LLC)
- Slack Technologies SEC filings (EDGAR) (Slack Technologies, LLC)