ZapBounce vs Kickbox
Kickbox is a deliverability consultancy that happens to sell a verifier, and the Sendex score reflects that: it rates how good an address is, not merely whether it exists. One clause undoes a lot of that goodwill, and it is the twelve-month credit expiry.
| ZapBounce | Kickbox | |
|---|---|---|
| Accuracy figure published | Coverage and accuracy together, once measured | None published |
| 1,000 addresses | $5 | $5 for 500 |
| 10,000 addresses | $25 | Scales with volume |
| 100,000 addresses | $139 | About $0.004 an address at 250,000 |
| Free tier | 100 a month, no card | Not published |
| Credit expiry | Never | Credits expire after 12 months |
| Billed for unknowns | No | No |
Kickbox blocked automated checks or does not publish current pricing. Treat their figures here as indicative and confirm on their site.
How Kickbox prices it
$5 for 500 at the entry, falling to about $0.004 an address at 250,000. They only bill definitive results, which is the same principle we work on, and we credit them for it.
Where Kickbox is the better choice
Stated plainly, because a comparison page that never concedes anything is not worth reading.
- They only bill definitive results, which is the same principle we follow.
- The Sendex quality score goes beyond valid or invalid, which a binary verdict cannot.
- Deep deliverability consulting alongside the tool.
Where we differ
What ZapBounce does differently
- Their credits expire after twelve months. Ours never do.
- We publish coverage as a first-class number rather than only declining to bill unknowns.
What you give up leaving Kickbox
- They only bill definitive results, which is the same principle we follow.
- The Sendex quality score goes beyond valid or invalid, which a binary verdict cannot.
- Deep deliverability consulting alongside the tool.
Moving off 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.
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 Kickbox cannot do either
Questions people ask about Kickbox
How much does the twelve-month expiry actually cost?
Take what you bought, subtract what you used, and look at the purchase date. For a team that cleans a list twice a year, the unused remainder is often a third of the original spend. Our credits do not expire, which is the only reason this question favors us.
What replaces the Sendex score?
Nothing exactly. You would get a verdict, a catch-all label and an unresolved count. That is less nuance and more transparency about where the nuance ran out. Whether that trade works depends on how your segments are built.
Kickbox only bills definitive results. Do you?
Same rule. We never bill an address we could not resolve, and we took the idea from vendors like Kickbox who were doing it first. It should be standard by now and it is not.
Is ZapBounce cheaper than Kickbox?
We cannot compare reliably, because Kickbox does not publish current pricing where we could read it. Ours is $5 for 1,000 and $139 for 100,000.
Can I test both before deciding?
Yes, and you should. Run the same sample of a few thousand addresses through each and compare how many came back unresolved. That difference matters more than either accuracy claim.
Find your Kickbox purchase date. Their credits run out twelve months from it, and ours carry no expiry at all.
Run the same sample through us and Kickbox
100 free checks a month, no card, and the unknowns come back labeled.