It's hard to share information across your exec team, rest of company and board. Carrot makes it easy to do this and reduces the amount of work that goes into deciding / formatting communication for each audience. If slack helps the team stay in touch with one another, Carrot helps leaders stay in touch with their teams.
As you grow, alignment and transparency become harder and harder. At some point, email and slack become too noisy, and you need something to help communicate the important things effectively. Carrot's incredible for that.