Send emails that
won't
bounce
Stop deleting good leads. Recover Yahoo, Zoho & Outlook catch-all emails other verifiers mark as “Risky”
Or check if a Gmail address is real, free, no account.
"Finally found a tool that handles Yahoo and Zoho emails with 100% accuracy. We struggled with false positives for months until we switched. It's frankly incredible that no other verifier could do this."
"We were chaining multiple tools like MillionVerifier and some SMTP pinging scripts. It was a mess. Wontbounce replaced our entire stack in one afternoon. The API is insanely fast too."
"Cleaned a list of 50k emails with 0.1% bounce rate afterwards. I've never seen precision like this. The disposable email detection is also top-tier. Simply the best."
We verify what others guess.
Stop burning your domains with "Risky" results. We give you clear answers so you can book more meetings.
Stop trashing 30% of your leads.
Most verifiers mark Yahoo, Zoho, and Outlook emails as "Unknown" or "Risky". You delete them to be safe, losing
thousands in potential revenue.
Wontbounce is
different. We accurately resolve
most catch-all servers to tell you exactly which ones are valid.
Protect your sender reputation.
Don't let a single bounce burn your domain. Our strict validation filters out threats that others miss, keeping your deliverability at 99.9%.
Verify at scale.
Need to check 100k leads? Done. Our infrastructure is built for high-volume cold email teams who can't wait.
Recover 20% more revenue.
By turning "Unknown" results into "Valid" leads, Wontbounce directly increases your campaign size and meetings booked.
Start recovering leadsWe resolve what others can't.
While other tools give you "Catch-all" or "Unknown" results, we dig deeper. See why teams switch to Wontbounce.
| Provider | Yahoo | AOL | Zoho | Outlook |
|---|---|---|---|---|
|
Wontbounce
|
|
|
|
|
| MillionVerifier | ||||
| ZeroBounce | ||||
| Emailable | ||||
| NeverBounce | ||||
| EmailListVerify | ||||
| Hunter | ||||
| Bouncer |
Same test, written up by brand: Debounce alternatives, Clearout alternatives, and Snov.io alternatives.
Drop your CSV.
We'll handle the rest.
Just upload your list, go grab a coffee, and get a notification when your clean list is ready.
Upload your list
Drag and drop your CSV or Excel file. We support lists of up to 5 million contacts.
Deep Clean Processing
Our system checks syntax, domain health, and pings mailboxes without sending emails.
Download & Alerts
Get an email or Slack alert when it's done. Download your clean list instantly.
New Verification
Drag & drop your CSV
or click to browse files
Maximum accuracy.
Minimum cost.
See how much you save with Wontbounce compared to legacy providers for 100k verifications.
Choose your plan
Best value for email verification at scale.
Common Questions
Everything you need to know about our accuracy, data handling, and integration.
Stop guessing.
Start verifying.
Join marketers who trust Wontbounce to keep their sender reputation pristine. Clean your first 100 emails for free.