If you use Slack at work, you’ve likely noticed that the number of channels you’re invited to proliferates incessantly. David Sacks, one-quarter of the popular All In podcast and a renowned serial entrepreneur whose past companies include Yammer — an employee chat startup that sold to Microsoft for $1.2 billion in 2012 — says he can solve this problem. Toward that end, he teamed up with Evan Owen, formerly the VP of engineering at a collaboration app, Zinc, that ServiceMax acquired in 2019. The ...