Stop uploading
your email lists.
BounceBuster cleans format, dead domains, and undeliverable mailboxes right on your computer. Nothing uploaded, nothing stored, nothing billed per email. Unlimited lists, $19 once.
Two things a cloud validator can't sell you.
Everyone checks email the same way. The difference is where your list ends up, and how much you pay to clean it again next month.
Your list never leaves the machine.
No uploads, no API calls, no third-party processors. Validation happens entirely on your computer, so there is nothing to breach, retain, or sign a DPA for.
☁ cloudnever in the loop
$19 once. Not $19 a month.
No per-email metering, no subscription, no usage caps. Pay once and clean unlimited lists for as long as you own a computer.
And it genuinely catches the bad ones:
Format & syntax
Typos, missing domains, and malformed addresses, caught before they bounce.
Dead domains
Addresses on domains that no longer resolve or have been abandoned.
Mailbox (MX) checks
Confirms the domain is actually set up to receive mail, not just registered.
Parallel speed
Thousands of addresses a second, on your own cores. No API rate limits.
How it runs. All of it, on your machine.
Four steps, start to clean list. None of them touch the internet.
- 01
Drop your list in
Drag a CSV or Excel file onto BounceBuster. It opens on your desktop, like any other app. Nothing is sent anywhere.
- 02
Validation runs locally
Every address is checked for format, dead domains, and undeliverable mailboxes, in parallel, on your own cores. No cloud, no API calls, no waiting on rate limits.
- 03
Review the reasons
See a clear breakdown of valid and invalid addresses, each with the specific reason it failed. Filter, search, and sort the results.
- 04
Export a clean list
Download the cleaned file and send with confidence. Your original list never left the machine it started on.
The people who can't upload their lists.
Legal, medical, finance, and agency teams switched the moment the data stopped moving.
“We handle sensitive client data in the legal sector. BounceBuster lets us clean email lists without anything ever leaving our network. That isn't convenience, it's a compliance requirement we can finally meet.”
“We were paying $400/month to ZeroBounce for our 50K lists. BounceBuster cost $19 once. Our GDPR officer loved that the data never moves.”
“Our prospect lists are the whole business. No way I'm uploading them to a cloud service. BounceBuster keeps everything local.”
Pay once. No per-email fees, ever.
Start free, up to 600 emails a month. When you need more, it's a single $19 payment, not a subscription that scales with your list.
Free
For small lists and trying it out.
Download free- Up to 600 emails / month
- Format, DNS & MX validation
- CSV and Excel support
- Export cleaned lists
- No account required
Professional
Less than a single month of any cloud tool. Unlimited, forever.
Get Professional for $19- Unlimited emails, no caps, no throttling
- 100% local; your data never leaves the machine
- Format, domain, and deliverability validation
- Detailed bounce reports with reasons
- CSV and Excel support
- Free lifetime updates
- Priority support
What the same job costs on the cloud
Competitor pricing based on publicly available plans as of 2025. Subject to change.
Clean your lists. Keep your data.
Download BounceBuster and validate up to 600 emails free. No account, no upload, no recurring bill. Upgrade to unlimited whenever you're ready.
Free up to 600 emails / month · unlimited for $19 once →