§ SEO EDITION · N° 050 · vs. MillionVerifierSLUG · VS/MILLIONVERIFIER
§ KillBounce vs MillionVerifierUpdated

KillBounce vs MillionVerifier: pricing and speed compared

Raw throughput on both providers is bounded by the same per-domain SMTP rate limits, so wall-clock time on a mixed-domain list is similar on both. What differs is pricing: KillBounce is cheaper at 10k to 100k volumes, MillionVerifier is cheaper at very large 1M+ enterprise tiers ($449 for 1M vs KillBounce $750). Pick by volume, not by speed claims.

$4
per 1,000
3-layer
SMTP probe
0–100
score
Get 100 free creditsSee pricing
  • Throughput on both is bounded by per-domain SMTP rate limits, not by the verifier engine
  • KillBounce is cheaper at 10k to 100k volumes; MillionVerifier is cheaper at 1M+ enterprise volumes
  • Both ship 100 free credits on signup (one-time, no card required)
  • Both parallelise per-domain probes, handle greylist backoff, and credit-back on wrong verdicts
§ Sample verificationN° 001
sarah.chen@acme.io
Sample result · what a clean Valid looks like
Status
Deliverable
Score
95
Syntax✓
MX records✓
SMTP accepted✓
Catch-all✓
Disposable✓
Role address✓
Mailbox provider
Google Workspace
+1 credit
§ 01 · THE TRUTHN° 001

The truth about "speed" claims

Every provider parallelises SMTP probes across domains. The bottleneck is not the verifier engine, it is the recipient mail server. Gmail, Outlook, Yahoo and every major provider rate-limit inbound SMTP handshakes per source IP. A list that is 80 percent Gmail addresses takes the same wall-clock time on any provider, because every provider is rate-limited against the same Gmail edge.

What actually varies is how each provider handles greylist retries, catch-all probe caching, and IP rotation. These are second-order effects that show up on skewed lists (single-domain B2B lists, obscure country TLDs). For typical mixed-domain outreach lists, throughput is within 20 percent across providers.

§ 02 · PRICING WHEREN° 002

Pricing where each one wins

VolumeKillBounceMillionVerifierWinner
Free credits on signup100 (one-time)100 (one-time)Tie
50,000 emails$70$89KillBounce
100,000 emails$120Slider (unpublished)Not directly comparable
1,000,000 emails$750$449MillionVerifier

MillionVerifier published anchors from millionverifier.com on 2026-09-23: 50k = $89 ($0.00178/email), 1M = $449 ($0.000449/email). Their middle-tier pricing sits behind a slider and is not directly published. KillBounce publishes every tier from 1k to 1M.

§ 03 · WHEN EACHN° 003

When each one is the right pick

  1. Pick MillionVerifier if you verify 1M+ at once or run enterprise volume.

    At the 1M tier MillionVerifier is $449 vs KillBounce $750. If your workload is dominated by one-off very large lists, that gap adds up. Their pricing curve is enterprise-tilted.

  2. Pick KillBounce if your monthly volume is 10k to 100k.

    This is the tier where KillBounce publishes cleanest pricing and where the value is highest. No sales calls, no minimums, credits never expire.

§ FAQ · Common questionsN° 100

Answers to the questions teams ask first

Q · 01

Does MillionVerifier actually verify faster in practice?

On mixed-domain lists, throughput is within 20 percent across every major provider because the bottleneck is recipient SMTP rate limits, not the verifier engine. Any provider claiming to be dramatically faster is either testing on unusual lists or comparing against a straw man.

Q · 02

How much does MillionVerifier give you for free?

100 credits on account signup, one time, no card required. Same as KillBounce. It is a trial-sized allowance, not a rolling daily quota.

Q · 03

Why is KillBounce cheaper in the 10k to 100k band?

Different market focus. MillionVerifier is priced for enterprise volumes (1M+ per job). KillBounce is priced for the cold-outreach and SaaS operator segment where 10k to 100k per month is the sweet spot.

Q · 04

Do both support the same API operations?

Yes. Single verify, bulk upload, job status polling, webhook on completion. The endpoint names differ, but the concepts and the migration path are 1:1.

Q · 05

What about accuracy differences?

Both offer credit-back on wrong deliverable verdicts. Independent benchmarks put every major provider within a few percentage points on accuracy. The credit-back policy is the more meaningful signal.

No card · No subscription · Credits never expire

Verify your first 100 emails free.

Sign up in under 30 seconds. Paste a list, hit verify, see the real SMTP-level result with a 0–100 deliverability score.

Get 100 free credits
§ Related · Keep exploringN° 999

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