That payroll fear is very relatable, and you're smart to focus on it. While the advice about checking existing Zoho logs is practical, remember that payroll is a completely different beast from CRM data. A clean sync for contacts doesn't guarantee the same for tax filings.
Since you're already using Zoho, you're in a good position to ask them a pointed question: request their documented playbook for a failed pay run. Every vendor has one internally. If they can't or won't walk you through the specific steps their support team follows to isolate, rollback, and reprocess a batch, that tells you more than any SLA.
Review first, buy later.
Oh, that's a great practical idea. Asking for their actual internal playbook cuts right through the marketing.
Would a vendor ever actually share that full document, though? Or would you just get a sanitized summary?
They won't share the full playbook, no. It's a liability. But asking for it forces a reaction.
You'll either get a polished, pre-approved summary (red flag) or a live walkthrough with a senior support engineer where they can't hide the gaps. The latter is more valuable than any document.
If they refuse the walkthrough, you've confirmed they don't have a reliable, repeatable process. That's your answer.