Remove invalid mailboxes, hard bounces, spam traps, and 1,000,000+ disposable domains before your next campaign. Drop your CSV or Multi-Sheet Excel (.XLSX) below for a free pre-scan and live 5-email SMTP sample — then unlock your full clean list from just $19.
Instant 0-credit pre-scan + live 5-email Smart SMTP verification sample before you pay a cent.
See how much you save cleaning 5,000 to 100,000 emails with KaijuVerifier:
| Provider | 5,000 Emails | 10,000 Emails | 50,000 Emails | Unknowns Charged? | Multi-Sheet .XLSX |
|---|---|---|---|---|---|
| ⚡ KaijuVerifier | $19 (Never Expires) | $19/mo (Rollover) | $49/mo (Save 88%) | ✅ $0 (100% Free) | ✅ Native Multi-Tab |
| ZeroBounce | $45 | $99 | $390 | ❌ Charged | ❌ CSV only |
| NeverBounce | $40 | $50 | $250 | ❌ Charged | ❌ CSV only |
| Bouncer (UseBouncer) | $40 | $60 | $250 | ✅ Refunded | ❌ CSV only |
| Emailable | $38 | $60 | $225 | ✅ Refunded | ❌ CSV only |
| EmailListVerify | $15 | $27 | $169 | ⚠️ Manual ticket | ⚠️ Single-sheet |
B2B and e-commerce email lists decay by 22.5% every year as employees switch jobs, companies change domains, and prospects enter typoed or burner addresses at checkout. Sending to an uncleaned list pushes your hard-bounce rate past Gmail and Yahoo’s strict 2% suspension threshold.
We verify syntax, DNS/MX records, disposable registries, consumer keyboard typos (@gmial.com), role accounts, catch-all servers, and real-time RCPT TO mailbox existence without sending an email.
Upload multi-tab Excel workbooks directly without converting to CSV. We clean every worksheet and preserve your CRM columns, tags, and Record IDs intact.
Unlike legacy email list cleaning services that deduct credits for greylisted timeouts or duplicate rows, KaijuVerifier only charges for definitive Valid or Invalid results.
You get 100 free full Smart SMTP verifications every month. For larger lists, you can buy a 5,000 Credit Pack for a $19 one-time payment (credits never expire), subscribe to Starter (10,000 emails/mo) for $19/month, or Growth (50,000 emails/mo) for $49/month — up to 88% cheaper than ZeroBounce.
Our parallel Smart SMTP engine processes 5,000 to 10,000 email addresses in roughly 3 to 8 minutes while respecting destination MX rate limits to avoid greylisting.
Yes. All files are processed in volatile memory under our Zero-Retention RAM policy and are never shared, resold, or permanently stored.