Serguei Mourachov

Founder

Co-founder of Slack. Stewart Butterfield's longest-tenured collaborator, working together since the dot-com bubble era. Immigrated to Canada from Russia in the late 1980s. At Tiny Speck, he built the Java servers powering the real-time messaging layer of Glitch, which became the foundation for Slack.

Overview

Companies
1
Roles
Founder

Companies

1 company
Slack $1.4B
Acquired Founder

Workplace messaging and collaboration platform that transformed business communication. Originally built as an internal tool at Tiny Speck during development of the game Glitch, then pivoted to become the fastest-growing enterprise software company in history.

Founder data is compiled from company records, public announcements, and verified sources. Roles reflect current or most recent known positions.