Get Kickbox-grade REST API ergonomics, 0–100 composite deliverability scoring (A–F grade), and HMAC-signed webhooks — at $19 for 10k and $49 for 50k instead of $70 and $350.
Slide to your monthly email verification volume to see your exact savings:
| Feature / Metric | ⚡ KaijuVerifier | Kickbox |
|---|---|---|
| 10,000 Verifications | $19 / mo (or $19 for 5k Non-Expiring Pack) | $70 |
| 50,000 Verifications | $49 / mo | $350 |
| 250,000 Verifications | $149 / mo | $1,200 |
| Recurring Free Tier | ✅ 100 / month forever (Full Smart SMTP) | 100 credits one-time only |
| Unknown / Greylisted Billing | ✅ $0 (100% Free — never deducted) | ✅ Refunded |
Multi-Sheet Excel (.XLSX) |
✅ Native Multi-Tab Upload & Export | ❌ CSV / single-sheet XLS only |
| Unused Credit Rollover | ✅ Monthly Rollover + Never-Expiring Packs | ❌ Expiring credits |
| Disposable Email Registry | ✅ 1,000,000+ domains updated daily | ~200,000 domains |
| Pre-DNS Consumer Typo Guard | ✅ Auto-suggests gmial.com → gmail.com ($0 cost) |
⚠️ Basic syntax only |
| Included Free Deliverability Suite | ✅ B2B Email Finder + 360° SPF/DKIM/DMARC/DNSBL Audit | ❌ Paid add-on or not included |
Kickbox is ideal if you require direct 1-click OAuth integrations with legacy enterprise ESPs like Marketo or Eloqua.
For 95% of SaaS products, growth agencies, cold outreach teams, and e-commerce stores, KaijuVerifier delivers identical 99%+ SMTP accuracy at up to 86% lower cost.
Read our in-depth editorial breakdown →Instant client-side pre-scan (0 credits) + live 5-email Smart SMTP sample check before you even sign up.
Compare our real-time latency, composite 0–100 score, and catch-all/typo detection against Kickbox — free and without signup:
Yes. Every verification response includes a composite 0–100 score and letter grade (A to F) calculated from syntax, DNS/MX redundancy, Smart SMTP handshake, catch-all status, role-based check, and disposable registry.
Yes. Any address at @sandbox.kaijuverifier.com (valid@, invalid@, catchall@, disposable@, role@, unknown@) returns deterministic responses in under 70ms without consuming credits.