Backstage interview with the Slack engineers: <a href="http:&#x2F;&#x2F;techcrunch.com&#x2F;2016&#x2F;02&#x2F;09&#x2F;slack-wins-for-fastest-rising-startup&#x2F;" rel="nofollow">http:&#x2F;&#x2F;techcrunch.com&#x2F;2016&#x2F;02&#x2F;09&#x2F;slack-wins-for-fastest-risi...</a>