4-bucket deliverability intelligence for cold email agencies. Not just valid/invalid — SAFE, PROTECTED, RISKY, DEAD.
1 credit per verified result. Credits never expire. No inbox access required.
Free domain check · No signup required · No credits used
Enter any email or domain above to see real results
No signup · No credit card · Instant results
Cleaner
Lists before launch
Separate safe, risky, and dead emails
Lower
Bounce risk
Catch bad addresses before sending
Protect
Sending domains
Avoid burning warmed-up inboxes
1 credit
Per verified result
Credits never expire
Built for cold email teams that can't afford bad data
5-layer
Intelligence per email
Not just SMTP
30
Concurrent SMTP threads
Titan Engine
6
Dedicated sending IPs
No per-IP rate limits
1 credit
Per verified result
Credits never expire
They're failing because they never reach the inbox. Most cold email campaigns lose 20–30% of potential replies to deliverability problems — before a single prospect reads your subject line.
Every hard bounce signals to ISPs that your sending domain can't be trusted. It doesn't recover — it gets blacklisted.
Your email shows 'Sent'. Your prospect never saw it. Spam filters kill campaigns silently — no bounce, no trace.
A single dirty campaign can blacklist your sending domain permanently — and no amount of warming recovers a burned domain.
No guesswork. No waiting. Just clear intelligence before you send.
Drop your CSV into Campaign Scan. Any size, any format.
Full SMTP probe + 5 intelligence addons per email, in parallel.
See your bounce estimate and domain health before sending.
Clean list and risky list separated. One click download.
Launch knowing your domain is protected and your list is clean.
Every email check runs 5 intelligence addons automatically. No extra steps.
SPF, DMARC, DKIM, MX — scored per domain. Know which domains in your list are sending into spam before you send.
Full SMTP handshake — EHLO, MAIL FROM, RCPT TO — against the real mail server. No DNS-only guesses.
Check sending IPs against DNSBL blacklists before every campaign. Catch reputation issues early.
Role addresses, disposable emails, free providers flagged automatically. Filter for B2B quality.
Paste your subject and body — get a spam trigger score before you hit send.
Probes cycle across 6 dedicated IPs. No per-IP rate limits, accurate results at scale.
If your revenue depends on cold email, VerifyFlow protects it.
Protect client domains, deliver campaign health reports, and charge a premium for deliverability intelligence.
Verify prospect lists before outbound sequences. Stop burning your sending domain on bad data.
Qualify leads at the email level before handing to sales. Higher quality pipeline, fewer wasted calls.
Running Instantly, Smartlead, or Lemlist? Clean your list first. More emails reaching inbox = more pipeline.
Real SMTP server checks — not DNS guesses. Five addons where others give you one.
| Provider | 1k | 10k | 50k | 5 addons? | RISKY free? | 4-bucket? |
|---|---|---|---|---|---|---|
| ZeroBounce | $8 | $80 | $250 | — | No | ✗ |
| NeverBounce | $8 | $80 | $200 | — | No | ✗ |
| Kickbox | $10 | $100 | $350 | — | Yes | ✗ |
| Emailable | $5 | $50 | $175 | — | No | ✗ |
| VerifyFlow | $9.99 | $99.99 | $199 | 5 ✓ | Always ✓ | ✓ |
Credits never expire. Unknown and catch-all are always free.
Pay As You Go
$9.99 / 1k credits
No subscription. Buy when you need.
Growth
$99.99 ONE-TIME
10,000 credits — one-time purchase
Pro
$199 ONE-TIME
50,000 credits — one-time purchase
All verified results consume 1 credit · Credits never expire
We never ask for your email password or account access.
Enterprise-grade WAF + rate limiting on all endpoints.
Your email lists are never shared or sold. Ever.
Titan Engine runs on dedicated OVH infrastructure.
Everything you need to know before you start.
Run a free check in 60 seconds — before your next campaign burns your domain.
Run Free Deliverability Check →