This seems really cool. As an engineering manager, I can't see how I'd make use of this in my day-to-day, but I could definitely see the sales team using it.
One of my biggest questions is: why Slack? It seems like the majority of the incoming streams would come from email. And it seems like you're targeting integration with SalesForce -- at least that's what I get from the home page.
Other than that -- not to nitpick, but there's a grammar error in your first graphic: https://www.tryscribe.com/static/img/email.png . It says "You've have an email".