Kickbox alternatives
Teams leaving Kickbox usually compare Bouncer, MillionVerifier and ZapBounce. Kickbox charges $500 for 100,000 checks, and its credits expire one year after purchase (both read on kickbox.com on 24 September 2026). ZapBounce charges $139 for 100,000, never bills an unknown, and its credits never expire.
| Service | 100,000 addresses | Credits expire? | Bills unknowns? |
|---|---|---|---|
| ZapBounce | $139 | Never | No |
| ZeroBounce | Subscription only | Credits roll over while the subscription is active | Not stated |
| Bouncer | $400, and 1,000,000 for $2,000 | Never | No |
| Emailable | Custom | Never | No |
| Clearout | Not listed | Never | No |
| MillionVerifier | Not shown; 50,000 is $89 and 1,000,000 is $449 | Never | No |
| Kickbox | $500 ($1,100 for 250,000; $2,999 for a million) | Credits expire one year from purchase | No |
Read from each vendor's own pricing page in September 2026. Prices move, so confirm theirs before you buy. Ours are published in full on the pricing page.
Why people look elsewhere
Twelve-month credit expiry, more than anything else. Buy for a migration, use two thirds, and the rest evaporates on the anniversary. For anyone cleaning a list twice a year that single clause decides the vendor.
Kickbox sells pay-as-you-go packs from $5 for 500 to $2,999 for a million, and unknown results don't count against the balance (kickbox.com, read 24 September 2026). The clause that changes the arithmetic is expiry. Credits lapse one year after purchase, so your real rate is what you spent divided by what you used before then. ZapBounce credits carry no date at all.
What ZapBounce changes for a Kickbox user
The differences that show up on the first invoice and the first results file.
The short version
- Credits never expire. Kickbox credits expire twelve months after purchase, so a balance bought for a migration can lapse before the next list arrives.
- Published prices on one page: $5 for 1,000, $25 for 10,000 and $139 for 100,000, with no minimum.
- Coverage reported as a headline number on every list, beside the unknowns we never bill.
- 100 credits free each month, no card, to test a sample before you buy anything.
- Four plain results and three flags that any segment rule can read, with the literal SMTP code attached to every row.
Before you move off Kickbox
Run the same sample through two vendors and the interesting number is not how many came back valid.
Look up your purchase date
Kickbox credits expire twelve months after you buy them. Anything left on that date is gone, so the anniversary sets the value of what you already hold.
Trace where the Sendex score is used
Anything that thresholds on a quality grade needs rewriting against a verdict plus a catch-all label. That rewrite is the real migration, so scope it first.
Work out your true rate
Divide what you spent on Kickbox by the credits you used before they lapsed. Set that figure beside ZapBounce's ladder: $25 for 10,000 and $139 for 100,000, with no expiry.
Keep the unknown rule you have
Kickbox doesn't count unknowns against your balance. ZapBounce never bills an unknown or a duplicate, and prints both rules on its pricing page.
What switching actually involves
Easy, but the Sendex score does not come with you. If your workflow thresholds on it, you are replacing a quality score with a binary verdict plus a catch-all label, and that is a real change to how you segment.
What stays true whichever verifier replaces Kickbox
Questions about moving off Kickbox
Do Kickbox credits really expire?
Yes, one year from the date of purchase, per the Kickbox terms of service effective 26 August 2025. Check the purchase date on your last pack so you can spend what's left before it lapses. ZapBounce credits never expire.
Can we verify a purchased list after leaving Kickbox?
Yes, if you have a lawful basis to process every address. Kickbox's acceptable use policy bars purchased lists whatever the source (read 24 September 2026). ZapBounce's terms ask for a lawful basis instead, which covers lists from a data provider. Verifying never creates consent to email anyone.
Do we need a quality score after we leave?
Only if your rules were built around one. ZapBounce returns four fixed results, three flags and the literal SMTP code, with a reason on every row. A rule written against those doesn't drift, because nothing inside the product moves a threshold.
Why do people leave Kickbox?
Twelve-month credit expiry, more than anything else. Buy for a migration, use two thirds, and the rest evaporates on the anniversary. For anyone cleaning a list twice a year that single clause decides the vendor.
How hard is it to switch verifiers?
For bulk cleaning, no harder than uploading the file somewhere else. For real-time checks on a signup form it is an API swap, which is an afternoon.
Spend your Kickbox balance before its anniversary, then move to credits that never expire.
Put us next to Kickbox on your own list
100 free checks a month, no card.