No subscription, 70% cheaper, EU data residency. Same deliverability guarantee.
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| Feature | BounceZero | Kickbox |
|---|---|---|
| Free credits | 100 every month | Trial credits¹ |
| Price per 1,000 emails | $3.00 | Not machine-verifiable¹ |
| Monthly subscription | None - pay as you go | Optional subscription¹ |
| Credits expiry | Never expire | Reported no expiry¹ |
| Verification signals | 65+ signals | Sendex score + flags (count not published) |
| SMTP deep check | ✓ | ✓ |
| Catch-all detection | ✓ Advanced | ✓ |
| Disposable email detection | ✓ | ✓ |
| Spam trap detection | ✓ | ✓ |
| Bulk CSV upload | ✓ | ✓ |
| REST API | ✓ | ✓ |
| Webhooks | ✓ | ✓ |
| EU data residency | ✓ UK/EU | ✗ US only |
| Plain-English explanations | ✓ | ✗ |
| Domain intelligence | ✓ | ✗ |
| Advertised accuracy (vendor claims²) | 99.8% | 99% |
| Support | Telegram + Email | Email only |
¹ Kickbox blocks automated access to its pricing page (last attempted 7 Aug 2026), so we do not print Kickbox prices as fact - figures circulating in third-party reviews put entry pricing around $8-10 per 1,000, and Kickbox prepaid credits are reported not to expire. Confirm at kickbox.com/pricing. We only assert competitor figures we can date and source. ² Accuracy figures are vendor claims, not independent benchmarks.
Kickbox returns a Sendex score from 0 to 100 - a proprietary number with no published breakdown of what moved it. When an address scores 65, you cannot tell whether the domain looks suspicious, the mailbox could not be confirmed, or the address pattern is merely unusual - three situations that call for three different actions.
BounceZero attaches an explanation to every verdict. A real example: this email scored 82 because SPF and DKIM pass and SMTP confirmed the mailbox exists, but no social profile was found, slightly reducing confidence. You can route on that - send, suppress, or re-check - instead of guessing at a bare number.
To be fair to Kickbox: its flags (accept-all, disposable, role) are solid, its prepaid credits are reported not to expire, and a single quality score is convenient when you just want a threshold. The difference is explainability, and it matters most on the risky middle of your list.
BounceZero costs a flat, published $3 per 1,000 with no plan tiers, no monthly commitment, and credits that never expire. Kickbox does not expose its pricing to automated verification, so compare rates yourself at kickbox.com - and ask why a per-email price needs to be hard to check.
Kickbox returns an Acceptall flag, Disposable flag, Role flag, and a SendEx score. BounceZero returns 65+ verification signals including SPF, DKIM, and DMARC per email, breach database checks, social profile detection, Bayesian scoring, and a plain-English explanation of why each email got its verdict.
Kickbox is a US-based company. BounceZero processes and stores all verification data exclusively in the EU (OVH France infrastructure) and is UK-registered under ICO registration ZC132839. If you operate under GDPR or handle EU personal data, BounceZero's data residency model removes a compliance step from your DPA process.
api.kickbox.com with api.bouncezero.io.result field from Kickbox to the status field in BounceZero - the values are equivalent.Our price is published; theirs requires a visit
Kickbox blocks automated price verification (last attempted 7 Aug 2026), so no Kickbox figures are quoted. BounceZero figures: bouncezero.io/pricing.
BounceZero charges $3 per 1,000 verifications with no subscription and credits that never expire. Kickbox blocks automated access to its pricing page, so we do not quote a current Kickbox rate here - third-party reviews have reported roughly $8-10 per 1,000 at entry volumes, but check kickbox.com for current pricing. Kickbox prepaid credits are also reported not to expire.
No. BounceZero is 100% pay-as-you-go with no monthly subscription. Kickbox offers both pay-as-you-go and monthly subscription plans. BounceZero credits never expire regardless of when you bought them.
Both services offer REST APIs with similar response structures. BounceZero returns 65+ signal fields per email including plain-English explanations, domain intelligence, and breach data. Kickbox returns its flags and Sendex score. BounceZero standard verification runs a deep multi-stage SMTP check, so a full fresh verification takes seconds; a separate realtime endpoint answers sub-second for signup-form use.
Yes. BounceZero is a UK-registered company (ICO registration ZC132839) with EU/UK data residency and full GDPR compliance. All email data is processed and stored in the EU/UK. Kickbox is US-based.
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