Zendesk Support holds one of the more sensitive categories of customer data an organization collects: whatever a person chose to say in a support ticket, often including account details, complaints, and sometimes information they wouldn't have volunteered anywhere else. That makes it a near-certain target whenever someone exercises an access or deletion right, and a genuinely awkward one to fulfill by hand, since tickets and their comment threads are exactly the kind of unstructured, high-volume data manual review handles badly.
Ketch connects to Zendesk Support to handle both directions of that request, with a deliberate safeguard against deleting a conversation that isn't actually finished.