Stewart Butterfield in Conversation with Farhad Manjoo - 2016 SXSW Music, Film + Interactive Festival
AUSTIN, TX - MARCH 15: Stewart Butterfield, CEO of Slack speaks onstage at 'Stewart Butterfield in Conversation with Farhad Manjoo' during the 2016 SXSW Music, Film + Interactive Festival at Austin Convention Center on March 15, 2016 in Austin, Texas. (Photo by Mindy Best/Getty Images for SXSW)