Payroll platforms handle bank accounts and SSNs — what can you verify from the outside?

Payroll platforms literally have your employees' bank account numbers and social security numbers. The trust bar should be as high as banking.

I checked what you can verify about payroll providers from the outside — security headers, privacy policies, compliance evidence, DMARC configuration.

For small business owners — did you check any of this before uploading your employees' financial data? What would you want to verify?