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Sourcing Custom Mailing Lists (Datazapp)

If you need a more specific or granular mailing list than what the built-in Radius Search offers, you can use Datazapp.com to create highly targeted lists, then upload the CSV to thanks.io.

Step 1: Build a list on Datazapp​

Datazapp.com is a third-party data service. No subscription is required — you pay per record.

Typical pricing:

  • B2B lists with email and phone: ~$0.02/record
  • Homeowner data: ~$0.025–$0.04/record

Available list categories include B2B prospect data, consumer lists, political data, and real estate lists (recent home buyers, absentee owners, etc.).

To run a search:

  1. Choose a data type (e.g., homeowner list).
  2. Select the data fields you want — mailing address, phone, email. You can opt to have phone numbers scrubbed against the Do Not Call list.
  3. Specify a geography by zip code, city, or metro area.
  4. Use advanced filters to narrow further: AI-powered likelihood of selling, empty nester status, home equity, age, income, home value, and more.

Once your search is complete, Datazapp shows the record count and total cost. Purchase and download the list as a CSV.

Step 2: Upload the CSV to thanks.io​

  1. In your thanks.io dashboard, go to Mailing Lists.
  2. Click Add List and upload the CSV.
  3. Map the columns to the correct thanks.io fields. See CSV Upload & Format for details.
  4. Double-check the address field mapping — especially for absentee owner lists, which often include both a mailing address and a property address. Map the mailing address (not the property address) so mail reaches the owner.
  5. Confirm the import.

Need help uploading?​

If you run into issues or prefer not to handle the upload yourself, email your list to support@thanks.io or use the in-app chat. The thanks.io team can import it for you.