Slack Achieves 53% Adoption Rate In Communication Category As Of September 2026

Slack, the business messaging platform for team communication and collaboration, ranks No. 2 in Ramp’s Communication category as of September 2026, with a 53% adoption rate, up 3 percentage points year over year. The platform supports channel-based messaging, workflow automation and third-party integrations, with 40% of new category adopters choosing Slack and a 45% competitor-switch rate. FOUNDERS: Stewart Butterfield, Cal Henderson, Eric Costello & Serguei Mourachov HQ: San Francisco, California #VentureCapital #Slack #Ramp #TradedVC