Compare · Qualisend vs Kickbox
Qualisend vs Kickbox.
Both verify email addresses down to a real SMTP conversation. Kickbox fits larger senders who also want deliverability consulting-style tooling next to verification. Qualisend fits teams that want verification that just works, priced for smaller senders too, with EU data processing. Everything below is sourced and dated - where we haven't verified a Kickbox capability, we say so instead of guessing.
Choose Qualisend if
You want a clean, modern verifier with per-address evidence and honest catch-all verdicts, EU processing rather than US-only, and pricing that starts at $6 per 1,000.
Choose Kickbox if
You're a larger sender who wants verification bundled with deliverability tooling and reputation guidance, and US data processing works for you.
Side by side
Eight criteria buyers actually decide on - not every feature either product has. Kickbox facts come from their public pricing and docs, captured 2026-07; recheck before relying on them.
| Criterion | Qualisend | Kickbox |
|---|---|---|
| Entry price | $6 / 1,000 pay-as-you-go, no minimum plan | $5 / 500 (~$0.01 per address)source: kickbox.com/pricing · 2026-07 |
| Free tier | 100 credits, never expire | 100 free verificationssource: pricing page · 2026-07 |
| Catch-all handling | Reported as catch-all, with the SMTP evidence shown - never rounded up to "valid" | Returned as an accept_all flagsource: API docs · 2026-07 |
| Per-address evidence | MX record, inferred provider, SMTP reason code on every result | Sendex quality score (0.0-1.0) plus status flagssource: API docs · 2026-07 |
| Bulk cleaning | CSV or paste up to 1M addresses, live progress, duplicates charged once | CSV upload and cleaned downloadsource: product pages · 2026-07 |
| Developer API | REST, scoped keys, per-key rate limits | REST API, developer-friendlysource: API docs · 2026-07 |
| Adjacent tools | None - verification only, by design | Deliverability tooling and reputation guidancesource: product pages · 2026-07 |
| EU data processing | All processing on EU infrastructure (Ireland) | US-based (Seattle); no EU residency documentedsource: docs · 2026-07 |
Pricing at real volumes
One example bracket each. Both providers get cheaper at volume - the difference is at the entry point and in the subscription model.
Qualisend
$6
per 1,000 verifications, pay-as-you-go
- Credits never expire
- Pro subscription: any volume 1k-1M at 20% below pay-as-you-go
- Duplicates in a list charged once
Kickbox
$5
for 500 credits (~$0.01 each) · captured 2026-07
- 100 free verifications to start
- Credits don't expire
- Sendex deliverability score included
The real difference: what a verdict means
Feature tables hide the philosophical gap. These two are why teams switch to us.
We don't round catch-all up
When a domain accepts every address, no vendor can truly confirm the mailbox - so we say exactly that, show the probe evidence, and let you decide your risk tolerance. Verdicts that quietly upgrade "unverifiable" to "valid" look better in a demo and cost you bounces in production.
Every result shows its work
Each address carries its MX record, inferred provider, and the raw SMTP reason. When a result surprises you, you can see why instead of trusting a black box - which also means you can defend the clean to a client or a deliverability auditor.
Common questions
Other comparisons
Weighing more options? Read our roundup of Kickbox alternatives →
Run the same list through both.
100 free credits, no card. Verify a sample in Qualisend, compare the verdicts and the evidence against what Kickbox told you, and keep whichever you trust more.