Validate bulk lists (.CSV, .TXT, Multi-Sheet .XLSX) and real-time web forms before hard bounces damage your sender reputation. Drop your file below for an instant 0-credit pre-scan and live 5-email Smart SMTP sample.
Supports .CSV, .TXT, .XLS and Multi-Sheet .XLSX. Duplicates and Unknowns are always $0.
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 |
Legacy email validation services charge up to $99 for 10,000 validations and still deduct credits when destination mail servers time out. KaijuVerifier combines sub-second DNS/MX/SMTP validation with transparent billing:
Validates RFC 5322 syntax, MX records, 1,000,000+ disposable providers, keyboard typos (@gmial.com), role accounts, catch-all servers, and live RCPT TO mailbox status.
Upload multi-tab Excel workbooks directly without losing formatting, or validate signups in <250ms via POST /api/v1/verify.
Get 5,000 non-expiring credits for $19 one-time, 10,000/mo for $19/mo, or 50,000/mo for $49/mo with automatic unused credit rollover.
Syntax checking only verifies that an address contains an @ symbol and a domain. Our email validation service performs a 7-Layer check including DNS MX resolution, disposable domain filtering, catch-all probing, and a live SMTP handshake to confirm the mailbox actually exists.
Every account includes 100 free email validations per month. Paid packs start at $19 for 5,000 never-expiring credits, or $19/month for 10,000 monthly validations with rollover.