You spend hours researching prospects. Don't let a bad email address kill the conversation before it starts. BounceZero gives every rep a clean list before the cadence fires.
Prospecting tools give you email guesses, not guaranteed addresses. Every guess that bounces chips away at the one asset your whole team shares: the sending domain.
B2B contacts change jobs constantly. Roughly 22% of business email addresses go stale every year - the Apollo export from last quarter is already rotting. Verification catches decay before your sequence does.
Gmail and Outlook score bounce rates per sending domain, not per rep. When one SDR blasts an unverified list and crosses the ~2% bounce threshold, every rep on that domain starts landing in spam.
Outreach, Salesloft, and Apollo sequences send on schedule - they never pause to ask if the address is real. By the time bounce alerts appear, the damage to your domain reputation is already done.
Every address in your list runs through the full BounceZero pipeline - up to 99.8% accuracy in internal testing on SMTP-verifiable addresses on the verdicts your cadence depends on.
SMTP-level confirmation that the prospect's mailbox actually exists and accepts mail - not just that the domain looks plausible.
23% of B2B domains accept everything, then silently drop it. Our 3-probe method separates real inboxes from catch-all traps.
Flags sales@, info@, and team@ addresses that rarely reach a decision-maker - so reps stop personalizing emails nobody reads.
Catches temporary and throwaway domains that pollute enriched lists and skew your reply-rate metrics.
Confirms the domain has live mail servers before your sequence attempts delivery - dead domains never enter the cadence.
Identifies recycled addresses turned into traps by blocklist operators. One trap hit can blacklist your entire outreach domain.
Slot BounceZero between enrichment and outreach - no workflow changes, no new tools for reps to learn.
Pull contacts from Apollo, Sales Navigator, ZoomInfo, Clay, or your CRM - any CSV with an email column works.
Drag the CSV into the bulk dashboard, or verify programmatically via the API at timing that varies by provider and verification path. Dashboard jobs up to 1,000,000 addresses.
Mailbox existence, 3-probe catch-all, role, disposable, MX, and spam trap screening - a 10K list finishes in 5-10 minutes.
Get your list back split into valid, invalid, and risky - with a per-address verdict your team can filter on instantly.
Push valid addresses into Outreach, Salesloft, or Apollo. Bounce rate stays under 0.5%, and replies land where reps can work them.
Warming a replacement outreach domain takes 4-6 weeks of lost pipeline. Verifying the list first costs $3 per 1,000 emails.
Prospecting tools like Apollo, Hunter, and ZoomInfo provide pattern-based email guesses, not confirmed addresses. Combined with 22% annual B2B email decay, a typical sourced list contains 10-25% undeliverable addresses. Sending sequences to those addresses drives bounce rates past the ~2% threshold where Gmail and Outlook throttle your entire sending domain - hurting every rep on the team.
Around 23% of B2B domains are catch-all: they accept mail for any address, so a basic SMTP check marks everything "valid". BounceZero uses a 3-probe catch-all detection method to distinguish real mailboxes from catch-all acceptance, so reps know which addresses are genuinely safe to sequence and which are risky.
A 10,000-email list processes in 5-10 minutes via bulk CSV upload, with dashboard jobs supporting up to 1,000,000 addresses. For real-time workflows, the API returns a verdict with timing that varies by provider and verification path on average - fast enough to verify addresses as reps add them to the CRM.
BounceZero costs $3 per 1,000 verifications with credits that never expire. An SDR sourcing 2,000 new prospects a month costs about $6/month to keep fully verified. Every account also includes 100 free verifications per month with no credit card required.
Yes - via CSV round-trip or API. Export prospects, verify with BounceZero, and import only the valid segment back into your sequencer. Teams with engineering resources use the REST API to verify addresses automatically before contacts enter a cadence. Documentation is at bouncezero.io/api-email-validation.
No tool can guarantee zero bounces - mailbox status can change between verification and send. BounceZero verifies with up to 99.8% accuracy in internal testing on SMTP-verifiable addresses (industry benchmark is ~95%), and cleaned lists typically bounce below 0.5%, comfortably inside the safe zone for Gmail and Outlook domain reputation.
100 free verifications every month. up to 99.8% accuracy in internal testing on SMTP-verifiable addresses. $3 per 1,000 thereafter. Your reps did the research - make sure the email arrives.
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