Start free with 100 full SMTP verifications/month — no card required. Subscribe from $19/mo (with rollover) or buy never-expiring credit packs.
Choose between Monthly Subscriptions (up to 70% cheaper per email, with credit rollover) or Pay-As-You-Go Credit Packs that never expire.
Unknown, catch-all, duplicate, typo-squatter, and syntax-error rows are 100% free. Credits are only deducted for definitive Valid or Invalid verdicts.
On Starter, Growth, and Scale plans, unused monthly credits automatically roll over into your next billing cycle (up to 1× your monthly limit). Pay-As-You-Go packs never expire.
Backed by our 7-Layer Smart SMTP & Catch-All Engine. If your campaign hard-bounce rate exceeds 2% on addresses verified as Valid, we refund the verification credits in full.
🔒 Secure checkout by Stripe · Cancel anytime · Unused monthly credits roll over · No card for the free tier · GDPR-compliant
Clean a list once a quarter or top up your account anytime. One-time payment, full Smart SMTP + Catch-All + Multi-Sheet Excel verification, and 0% expiration.
Side-by-side comparison at 10,000 and 50,000 verifications against the leading email verification platforms.
| Service | Free Tier | 10,000 Emails | 50,000 Emails | Unknown / Catch-All Billing |
|---|---|---|---|---|
| ⚡ KaijuVerifier | 100/mo free forever (Full SMTP) | $19.00 | $49.00 | $0 (100% Free) |
| EmailListVerify | 100 one-time | $28.00 | $99.00 | Refunded |
| MillionVerifier | Trial only | $39.00 | $79.00 | Refunded |
| NeverBounce | 10 signup credits | $50.00 | $250.00 | Charged |
| Bouncer (UseBouncer) | 100 one-time | $60.00 | $250.00 | Refunded |
| Emailable | 250 one-time | $60.00 | $225.00 | Refunded |
| Kickbox | 100 one-time | $70.00 | $350.00 | Refunded |
| ZeroBounce | 100/mo (business domain only) | $129.00 | $410.00 | Charged |
Email verification pricing has historically been inflated by legacy vendors charging $80 to $410 for 50,000 checks while deducting full credits on duplicate rows and inconclusive greylisted timeouts. KaijuVerifier re-engineered verification unit economics from first principles: $19 for 5,000 non-expiring Pay-As-You-Go credits, $19/month for 10,000 rollover credits, and $49/month for 50,000 rollover credits.
Every plan — including our 100 Free/Month Forever tier — includes full 7-Layer Smart SMTP verification, Catch-All canary risk scoring, 112,000+ disposable domain blocking, native Multi-Sheet Excel (.XLSX) upload, REST API & webhook access, and our $0 Unknown/Duplicate billing guarantee.
| Monthly Verification Volume | KaijuVerifier Rollover Plan | ZeroBounce / NeverBounce Cost & Your Annual Savings |
|---|---|---|
| 10,000 Verifications / Month | $19 / mo ($0.0019 / email) | ZeroBounce $99/mo · NeverBounce $50/mo → Save up to $960/yr |
| 50,000 Verifications / Month | $49 / mo ($0.00098 / email) | ZeroBounce $390/mo · NeverBounce $250/mo → Save up to $4,092/yr |
| 250,000 Verifications / Month | $149 / mo ($0.00059 / email) | ZeroBounce $1,375/mo · NeverBounce $1,000/mo → Save up to $14,712/yr |
| Unknown & Duplicate Rows | $0 Free (0 Credits Deducted) | Competitors deduct 1 full credit per unknown/greylisted timeout |
KaijuVerifier starts at $19 for 5,000 non-expiring Pay-As-You-Go credits or $19/month for 10,000 monthly rollover credits ($49/month for 50,000), saving you 75% to 88% compared to ZeroBounce ($99–$390) and NeverBounce ($50–$250).
No. Unlike legacy verifiers that burn credits on inconclusive server timeouts, KaijuVerifier charges $0 for Unknown, Greylisted, Duplicate, and Syntax-error rows.
Pay-As-You-Go credits never expire, and unused credits on Monthly/Annual Subscriptions automatically roll over into the following billing cycle.