Big news today for Stewart Butterfield and Slack, his enterprise collaboration app. It's raised $42.75 million, led by new investor The Social+Capital| TechCrunch
We launched Slack to the world on February 12th, 2014. Thirteen months after starting work, nine months after releasing our early alpha version, and six months after starting our preview release. We crossed the finish line we'd been sprinting toward for the last year, not fully realizing that we were| Building Slack