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 on email list cleaning service from 5,000 to 100,000 contacts with KaijuVerifier:
| Email List Cleaning Service Provider | 5k Tier (Email List Cleaning Service) | 10k Tier | 50k Tier | Unknowns Policy | Excel .XLSX Support |
|---|---|---|---|---|---|
| ⚡ KaijuVerifier (Email List Cleaning Service) | $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.
Our Managed & Self-Serve Email List Cleaning Service is built around Multi-Sheet .XLSX & CSV Hygiene, focused on Eliminating 99.7% of hard bounces before lifecycle broadcasts. Every check runs across our 7 distributed verification clusters with full TLS 1.3 security and zero data retention.
Unlike generic bulk tools that charge for duplicate rows or inconclusive timeouts, this workflow combines browser-native pre-scanning ($0 cost for duplicates and syntax errors) with live 7-Layer Smart SMTP verification starting at $19 for 5,000 non-expiring credits.
| Technical Dimension | Specification (Multi-Sheet .XLSX & CSV Hygiene) | Operational Outcome |
|---|---|---|
| Primary Architecture | Multi-Sheet .XLSX & CSV Hygiene | Eliminating 99.7% of hard bounces before lifecycle broadcasts |
| Accuracy & Unknown Policy | 99.7% Definitive SMTP Precision | $0 charged for Unknown, Greylisted, or Duplicate rows |
| Supported Formats & API | CSV, TXT, .XLS, Multi-Sheet .XLSX & REST API | 100 free monthly checks + non-expiring Pay-As-You-Go packs |