How do you assess the security of your vendors?

A people and suppliers question from almost every security questionnaire. Here is a model answer, the evidence a reviewer may ask for, and what to say if you don't do this yet.

A model answer

Vendors that handle customer data are reviewed before use, by checking their security documentation, such as a SOC 2 report or trust center, and their data processing terms. They are re-reviewed [every year]. Our current subprocessors are listed on our trust center.

Replace the parts in square brackets with what's true for you, and only answer yes to what you do.

Evidence a reviewer may ask for

  • Your vendor review checklist
  • Your published subprocessor list

If you don't do this yet

Start by listing your subprocessors, then record a short review for each. Pointing a reviewer at a published list already answers half the question.

Answer it once, on your trust center, for every reviewer.