How to Answer Subprocessor Questions in a Security Questionnaire
Subprocessor questions are really questions about where customer data goes. Buyers want to know which third parties support your product and whether those vendors create extra risk.
Quick note
This guide is practical product education, not legal advice, security advice, SOC 2 certification, GDPR certification, or compliance certification. Review every answer against your actual product and company processes before sending it to a buyer.
List vendors by purpose
A useful subprocessor answer includes vendor name, purpose, data category, and role. For example: hosting, database, payments, email, analytics, support, monitoring, or AI drafting.
Do not hide common vendors
Small SaaS teams often use Stripe, Vercel, Supabase, OpenAI, Postmark, Resend, analytics tools, or support tools. The exact list depends on your product. The point is to be complete and not pretend you run everything yourself.
Explain review and changes
Buyers may ask how subprocessors are reviewed and whether customers get notice before new subprocessors are added. If your process is lightweight, describe it honestly and improve it over time.
Create a subprocessor page
A public or private subprocessor page can reduce repeated questions. It does not need to be fancy. It needs to be accurate, updated, and easy to link.
Use VettBase to keep it consistent
VettBase has a subprocessor page generator and a workspace for saving answers, which helps keep vendor-related answers consistent across buyer reviews.
Make this easier in VettBase
VettBase helps small SaaS teams draft security questionnaire answers, save reviewed wording, reuse approved answers, and flag missing information before sending unsupported claims.