One bounce spike on a fresh domain and you are blacklisted. BounceZero integrates with every cold email platform - clean your list before the first email goes out.
Verify once with BounceZero, import clean to any platform. Works with every tool that accepts CSV - which is all of them.
Protect your sending infrastructure and inbox rotation from bounce spikes.
Keep every Smartlead inbox clean and every campaign firing at full capacity.
Personalised outreach needs real addresses. Verify before you customise.
Apollo averages 70-85% accuracy. Close the gap before your campaign starts.
Clay enriches at scale. BounceZero verifies at scale. Use both.
Protect your Outreach domain health score and sequence performance.
SDR cadences depend on clean data. Verify before the first cadence step.
Multichannel sequences fail when email bounces. Verify the email leg first.
Inbox rotation only works when every contact is real. Verify before import.
Woodpecker suspends accounts on high bounce rates. Prevention beats cure.
Protect your sender reputation across every Mailshake campaign.
Klenty cadences on verified data deliver measurably higher reply rates.
CRM data decays 22%/year. Audit your HubSpot contacts before every campaign.
Apollo, ZoomInfo, Lusha and Cognism all have accuracy gaps. Verify exports with BounceZero before they enter your cold email workflow.
Up to 15-30% of exported emails will bounce without pre-verification.
Up to 15-25% of exported emails will bounce without pre-verification.
Up to 18-28% of exported emails will bounce without pre-verification.
Up to 12-22% of exported emails will bounce without pre-verification.
Takes 10 minutes. Saves your domain.
Export contacts from Apollo, ZoomInfo, Lusha, Clay, LinkedIn Sales Navigator, or any source as a CSV with an email column.
Drag your CSV into BounceZero bulk verify. No formatting required - we detect the email column automatically. 10,000 emails processes in ~8 minutes.
Every address is categorised: Valid, Invalid, Risky, Catch-All, Disposable, or Role-Based. See the breakdown before downloading.
Download only Valid addresses. For high-volume cold email, also exclude Catch-All. For newsletter sends, Risky addresses can be included with caution.
Import the clean CSV directly to Instantly, Smartlead, Lemlist, Outreach, or any platform. Your domain starts clean. Your first send is your last surprise.
Most verifiers check 2-3 layers. BounceZero runs a full 6-layer validation so catch-alls, disposables, and spam traps do not slip through.
Rejects malformed addresses before any network request.
Confirms the domain is registered and has live mail servers.
Connects to the mail server and verifies the mailbox accepts mail - without sending.
3-probe fingerprinting identifies catch-all mail servers that accept every address.
Database of 8,000+ temporary email providers updated daily.
Flags admin@, info@, noreply@ and 300+ other role-based patterns that hurt cold email.
Different teams use cold email differently. Find the guide that matches your workflow.
Cadence-first workflows where bounce rate directly impacts SDR activity metrics and quota attainment.
Build verification into delivery SLAs and protect client sender domains across accounts.
List hygiene between issue sends to protect deliverability and maintain primary inbox placement.
Verify at scale across multiple client campaigns with per-client reporting and team access.
100 free credits. No credit card. Your first list clean is on us.
Ayoub built BounceZero's 5-stage validation pipeline, its dedicated BGP-announced IP infrastructure, and the Patroni HA PostgreSQL cluster behind every verification. Previously built high-volume email delivery infrastructure. Trained at 1337 Benguerir (École 42 network, 2019). Open-source: bgp_analyzer.
Strategy, writing, sequences, and lead generation
6-step B2B system: ICP, list build, verify, sequence, infrastructure, metrics
6-step process: ICP, list build, enrich, verify, segment, and sequence
5-part framework, before/after rewrites, and 10 writing rules
7-layer system: infrastructure, ICP, list, verify, copy, sequence, metrics
10 templates that get replies from C-suite executives
How many, when, and what to write in each sequence position
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