01note
Ground-truth signals
Independent ESP engagement data plus our own sequencer delivery feedback. An open means the email works — not a provider's opinion.
live · pipeline online
§01 · the reportEvery provider
lies to SMTP.
We don't play that game.
Microsoft, Google, Yahoo — every major MX now detects verifiers and returns 250 OK to everything. Netrion fuses five independent signals before we ever touch port 25. SMTP is a last resort, not the first step.
live · /v1/stats/publicrefresh · 30s
contacts scored
0
domains mapped
0
signals fused
0
uptime · 7d
0.00%
rolling
§02 · interactive
Drop any email.
Watch every signal unfold.
No account. No card. The demo runs the same pipeline as production — cache check, data-join, optional Microsoft HTTP, then SMTP only if we’re out of smarter options.
try ·
§03 · field trial · january 2026 · 10,000 addresses
Your IPs want to stay quiet.
Ours almost never talk.
Same 10k-email list. Same verdict distribution. One vendor probes every address. Netrion probes 9.3%. The difference is the intelligence layer.
Typical SMTP vendor
every address gets probed
100%
10,000 SMTP sessions · 10,000 outbound connections · your IPs on blocklists by week 2
Netrion Verify
cache + data-join + ms-http first
9%
930 SMTP sessions · 91% of the list scored from ground-truth signals · zero reputational cost
tier · distribution · netrion
cache
42%
data·join
39%
ms·http
10%
smtp
9%
§04 · intelligence layer
Verification is really
employment verification.
john@ibm.com is valid if — and only if — John still works at IBM. We track that. Raw SMTP doesn’t.
02note
Cross-source fusion
Same contact in 5x5 + Salutary + MixRank = high confidence. One source = treated with skepticism. The scorer tells you which.
03note
Employment decay
People change jobs. Stale-title rows get penalties. Fresh updates get boosts. Your list stays alive even when the market isn't.
04note
Never bursty
When we do probe, we rotate across a pool of warmed senders with jittered pacing and per-domain caps. Your deliverability never takes the hit for a noisy neighbor.
DATA-FIRST · SMTP LASTPROVIDER BLIND SPOTS — SOLVEDCROSS-SOURCE SIGNAL FUSIONSCORED AGAINST LIVE ENGAGEMENTEMPLOYMENT-AWARE VERIFICATIONLETTER GRADES · A+ TO FGRACEFUL ON CATCH-ALL DOMAINSAPI-FIRST · BULK READYDATA-FIRST · SMTP LASTPROVIDER BLIND SPOTS — SOLVEDCROSS-SOURCE SIGNAL FUSIONSCORED AGAINST LIVE ENGAGEMENTEMPLOYMENT-AWARE VERIFICATIONLETTER GRADES · A+ TO FGRACEFUL ON CATCH-ALL DOMAINSAPI-FIRST · BULK READY
§06 · credits & plans
Fair pricing.
No asterisks, no surprises.
Every verification counts as one credit — cache hits, data-join resolutions, even SMTP. Unused credits don’t roll over. Cancel any time.
- 1k
- free / mo
- 0
- setup fee
- ∞
- retention