Old donor and supporter lists rot — people change jobs, abandon addresses, mistype at sign-up. Email those dead addresses and your sender reputation drops, so even your real supporters stop seeing you. ClearBounce finds the dead weight before you hit send — and nonprofits clean up to 5,000 addresses free.
10M+
Emails verified
99.5%
Accuracy
US·EU·APAC
Verification regions
99.9%
Uptime SLA
You don’t have a growth team spamming lists — you have supporters who opted in over years of events, petitions, and one-time donations. That’s exactly the kind of list that quietly goes stale.
When 5–10% of a list has gone bad, mailbox providers notice. Your year-end appeal lands in Promotions or Spam, your open rates fall, and the platform you pay by list size keeps charging you for people who will never open again.
Cleaning the list first fixes all three at once: more of your message reaches inboxes, your reputation recovers, and you stop paying to store dead contacts. That’s the whole reason we made this offer free for nonprofits.
Upload a CSV and ClearBounce sorts every address into deliverable, risky, or undeliverable — with a clear breakdown you can act on before your next send.
Sign up with the nonprofit link. The NONPROFIT code attaches automatically — no card, no trial trap.
5,000 credits land in your balance. Signed up another way? Enter NONPROFIT in the Have a coupon code? box on the Pricing page.
Upload your list and clean it. Paste addresses or drop a CSV/XLSX. Already-verified contacts are skipped, so you never spend a credit twice.
Registered nonprofits, charities, foundations, and mission-driven orgs that email donors, members, or volunteers. If that’s you, the offer is yours.
One credit verifies one address, so you can clean a list of up to 5,000 contacts free. The credits don’t expire, so use them before your next big campaign whenever that is.
Yes. Uploads run over encrypted connections, are never sold or shared, and you can delete your lists from the dashboard at any time.
99.5%. Every address runs through a multi-stage engine — syntax, DNS, live SMTP probing across US/EU/APAC, plus spam-trap and catch-all detection — and comes back classified as deliverable, undeliverable, risky, or unknown.
Claim your 5,000 free credits and start verifying in under two minutes. No credit card required.
Claim 5,000 Free Credits