Why install clunky desktop verifiers that get your home or office IP blacklisted on port 25? Use KaijuVerifier’s cloud email & lead verification software right in your browser — with 100 free Smart SMTP verifications every month and instant CSV/.XLSX pre-scanning.
100% browser-based. Instant duplicate removal ($0) + live 5-email Smart SMTP verification preview.
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 |
Running downloadable desktop email verification software from your local network fails because residential and office ISPs block outbound TCP port 25, and probing mail servers from a single IP gets your domain blacklisted on Spamhaus within minutes. KaijuVerifier runs everything in the cloud:
All SMTP handshakes execute from our managed cloud infrastructure with automatic MX pacing, 24h catch-all caching, and Consumer Provider Zero-DHA protection.
Verify Apollo, LinkedIn Sales Navigator, ZoomInfo, and HubSpot lead lists with composite 0–100 lead quality scoring and catch-all isolation.
Drop multi-tab Excel files directly into your browser and download segmented Valid-Only, Catch-All, or Full Annotated workbooks.
Yes. You can run unlimited instant file pre-scans (counting duplicates, syntax errors, role accounts, and typos) plus 5 live SMTP sample probes per upload without even logging in, and registered accounts get 100 full Smart SMTP verifications free every month.
Absolutely. KaijuVerifier is engineered as B2B lead verification software: it detects corporate catch-all servers, verifies Google Workspace and Microsoft 365 mailboxes, and exports ready-to-send CSVs for Instantly, Smartlead, and HubSpot.