Kickbox is reliable, but its entry pricing is on the higher side and it is reported to bill duplicate addresses. We only charge for Passed and Failed results, our credits never expire, and your first 100 are free.
Get 100 Free Credits See pricing No credit card required · credits never expire · cancel nothing, there's no subscription.Kickbox earns trust on uptime and deliverability tooling, but reviewers note it charges for duplicate emails and its per-email entry price is comparatively high. Email Verifier API bills only Passed and Failed results, prices simply, and keeps credits that never expire, with a 16-point real-time API and 100 free credits.
The differences that actually change your bill and your code.
Fair billing: only Passed and Failed results consume credits.
Credits never expire, and 100 are free on signup.
A 16-point real-time API with SDKs in 6 languages.
Strong catch-all, disposable and spam-trap detection built in.
Compared on the things buyers and developers ask about most.
| Feature | Email Verifier API | Kickbox |
|---|---|---|
| Fair billing | Only Passed and Failed billed | Reported to charge for duplicates |
| Credits expire? | Never | Pay-as-you-go plus monthly plans |
| Real-time API | Yes, 16-point engine | Yes |
| Detection depth | Catch-all, disposable, spam-trap, role | Strong on reliability and uptime |
| Free credits | 100, no card | Limited free verifications |
| Best for | Cost-aware teams wanting depth | Reliability-focused senders |
A recurring Kickbox critique is that duplicate addresses still consume credits. We bill only for Passed and Failed verdicts, so cleaning a messy export does not quietly inflate your bill.
Our 16-point engine flags catch-all domains, disposable providers, known spam traps and role accounts, returning a clear status for each. These are the signals that actually protect your sender reputation.
No expiry, no subscription requirement, and 100 free credits so you can compare results against your current Kickbox output before switching.
Switching from Kickbox, answered.
Yes. Email Verifier API offers real-time, 16-point email verification at 98% accuracy on pay-as-you-go credits that never expire, with no subscription and 100 free credits to start, a simpler, developer-first alternative to Kickbox.
No. Credits never expire. You buy them once and use them whenever you need to, there is no subscription and no monthly reset.
Every new account includes 100 free verification credits with no credit card required, so you can run the same list through both tools and compare results before paying anything.
Yes. The 16-point engine is available as a real-time REST API with copy-paste SDKs for PHP, Python, Node.js, Go, Ruby and C#, returning a clear passed, failed, unknown or transient status.
The engine targets 98% accuracy using a 16-point check, including a live SMTP handshake that confirms mailbox existence without ever sending a message.
Run your own list through our 16-point engine and compare the results yourself. 100 free credits, no credit card, credits never expire.
Start verifying free