Protect your sender reputation at both the front door (real-time REST API signup validation) and inside your CRM (scheduled bulk CSV & Multi-Sheet .XLSX list hygiene).
Drop any .CSV, .TXT, or .XLSX export to see your list hygiene score and 5 live Smart SMTP checks.
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 |
One-off list cleaning fixes past decay, while continuous email hygiene prevents bad data from entering your CRM in the first place. KaijuVerifier gives you both in a single account:
Scrub exports from Salesforce, HubSpot, Marketo, Klaviyo, and Mailchimp with native Multi-Sheet .XLSX support and 0-100 composite scoring.
Call POST /api/v1/verify on signup forms, checkout pages, and HubSpot/Zapier webhooks to block disposable burners and fix typos in <250ms.
Built in the EU with in-memory processing, signed Data Processing Agreements (DPA), and automatic $0 billing on Unknowns.
Traditional enterprise email hygiene vendors lock you into $500+/month annual contracts and charge extra for API access. KaijuVerifier includes both Bulk CSV/.XLSX Hygiene and our full REST API + Webhooks starting at $19 (5k non-expiring pack or 10k/mo Starter).
Yes! Every account includes free access to our 360° Email Deliverability Test, SPF/DKIM/DMARC/BIMI/PTR inspectors, and DNSBL Blacklist checks.