Is our PCI compliance better than Zendesk?

Yes. Freshdesk’s approach to PCI compliance is more comprehensive and allows for additional use cases, unlike Zendesk.
Zendesk's approach to PCI compliance is by redaction - i.e, the 15-19 digit primary account number (or PAN) entered into the Zendesk’s PCI Compliant Ticket Field is redacted to the last 4 digits prior to the data being submitted and stored on Zendesk.
On the contrary, in our approach - we store the PAN in its entirety in a secure vault. Account owners in Freshdesk have the authority to define who can unmask and view or edit this information - which is not possible in Zendesk.
Further, as part of our security by design approach, we employ data minimization principles to securely purge cardholder data after 30-days.