Mailthentic vs Kickbox: Best Alternative (2026) | Mailthentic
Mailthentic
Honest Comparison (2026)

Mailthentic vs Kickbox

An email verification service with a Sendgrid heritage and a quality score.

Kickbox is a respected verifier known for its deliverability focus and Sendscore metric. Mailthentic offers the same verification depth, adds SPF, DKIM and DMARC checks on every address, and prices lower with credits that never expire.

Try Mailthentic Free Free Email Checker

Feature Comparison

Every feature, side by side. No marketing fluff.

Feature Mailthentic Kickbox
REST API ✓ ✓
Bulk list cleaning ✓ ✓
Email verification ✓ ✓
SMTP mailbox check ✓ ✓
Catch-all detection ✓ ✓
Credits never expire ✓ ✗
Role-based detection ✓ ✓
Domain health scoring ✓ ✗
Pay-as-you-go credits ✓ ✓
Free credits on signup 100 100
CRM integrations (OAuth) ✓ ✓
SPF / DKIM / DMARC check ✓ ✗
Disposable email detection ✓ ✓
Free email checker (no signup) ✓ ✗

Pricing Comparison

Transparent pricing, no hidden fees.

Volume Mailthentic Kickbox
1,000 verifications $5.00 $10.00
5,000 verifications $19.00 $40.00
25,000 verifications $69.00 $160.00

Pricing as of June 2026. Mailthentic pay-as-you-go credits never expire. See full pricing

Why Teams Choose Mailthentic

  • Lower cost per verification across tiers
  • SPF, DKIM and DMARC checks included on every address
  • Domain health scoring with recommendations
  • Free public email checker, no signup required
  • Credits never expire
  • Independent pay-as-you-go pricing, no minimums

Where Kickbox Excels

We believe in honest comparisons. Here is where Kickbox has advantages:

  • Well-regarded deliverability reputation
  • Sendscore quality metric for each address
  • Mature API and long market history

Mailthentic Is Ideal For...

Teams that want Kickbox-grade accuracy plus DNS authentication checks and lower, non-expiring pay-as-you-go pricing.

Frequently asked questions

Is Mailthentic a good Kickbox alternative?
Yes. Mailthentic matches Kickbox on verification quality and adds SPF, DKIM and DMARC checks plus domain health scoring on every address, typically at a lower price per verification.
Does Mailthentic offer an API like Kickbox?
Yes. Mailthentic provides a REST API for single and bulk verification, with the same DNS authentication checks available on every call.
How do I migrate from Kickbox?
Upload your CSV lists to the bulk verifier or switch your API calls to Mailthentic. You can start on 100 free credits.

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