Give Once.
Update Everywhere Keep Your address Private.

Mass Address™ lets you privately manage and update your mailing and email address across all the nonprofits you donate to.Nonprofits get 100% accurate contact info directly from you — no more outdated data, returned mail, or reliance on shady third-party data brokers.

For Donors

For Nonprofits

Donor-controlled
Privacy-first
No data brokers ever

Nonprofits waste thousands every year on bad donor data.
Donors hate the hassle of updating the same information over and over.

  • Addresses change → mail comes back

  • Emails go stale → appeals get ignored

  • Staff spends hours cleaning lists or buying unreliable broker data

  • You lose control over who has your personal information

The result? Lower response rates, wasted budgets, frustrated donors, and damaged trust.

With Mass Address™, you stay in control.

1. Create a Mass Address™ with your mailing address and email.
2. Approve or Deny who gets your address changes
3. Your validated addresses flow automatically and securely to every organization you support.Nonprofits receive fresh, first-party data directly from you in real time.No brokers--No scraping--No chasing.