We use ChurnZero for customer success automation. It is primarily used by our Customer Success Department, but other departments take advantage of it via the Salesforce connected app ChurnZero has provided.
This is not specific to ChurnZero but customer success automation, and in fact, customer success, in general, is a new and fledgling field so it takes a good deal of educating internal teams on how to take advantage of customer success automation.
ChurnZero is amazing if your company has a customer success team. If you don't have a customer success team yet, your product team or customer support teams can lead initiatives to drive product adoption and churn fighting efforts using ChurnZero.