Whilst the bulk of ProActive Campaigns is clearly meant for marketing purposes, we've found great use for it with Zendesk for bulk-notifications for Customer Service notices. The ability to import lists of customers from Excel and keep track of the tickets for each campaign has been of great help to us, as well as being able to personalise the messages using the imported data. Review collected by and hosted on G2.com.
At the moment, there isn't a way to populate Zendesk Ticket Form Fields using imported data (such as imported customer order numbers etc), which would be a feature we'd greatly appreciate. Review collected by and hosted on G2.com.