Sub-processors
Last updated: 25 October 2026
These are the companies that help us run ListBouncer and may handle personal data on our behalf. Each one is bound by its own data protection terms.
They handle the lists you upload
Hetzner Online
Runs the servers that check each address against its mail server.
United States (Hillsboro, Oregon), Germany (Nuremberg), Finland (Helsinki)
Neon
Database that stores your results, one row per address.
United States (AWS us-east)
Vercel
Hosts the website and dashboard, and handles uploads and downloads.
United States
Upstash
Queue that tells the checking servers a new list is waiting.
United States (us-east)
They handle your account only
These never see the addresses in your lists, only your own name, email and billing details.
Clerk
Sign-in and account security.
United States
Resend
Sends account emails, like "your list is ready".
United States
Polar
Takes payments and issues receipts.
United States
Zoho Mail
The support@listbouncer.com inbox.
United States
Changes
If we add or replace a company that handles your lists, we'll update this page at least 14 days before it starts. If you object to a change, email support@listbouncer.com and we'll work it out with you or close your account and refund your unused credits. Our data processing agreement covers this in full.