ZoomInfo data is powerful but not perfect - up to 30% of exported emails are stale or invalid. BounceZero verifies every contact in minutes before it hits your sender domain.
100 free verifications/month - No credit card required
ZoomInfo is the best B2B contact database on the market - but no database can outrun email decay. People change jobs, companies restructure, and mailboxes die between refresh cycles.
ZoomInfo email accuracy averages 70-80% at export time. B2B emails decay at roughly 22% per year, so even recently refreshed records include contacts who changed jobs last quarter.
Google and Microsoft flag senders above a 2% bounce rate. Blast an unverified 10K ZoomInfo export and a single campaign can push your domain into spam folders for weeks.
Every dead contact in your outreach tool consumes sending credits, inflates your list size, and poisons open-rate and reply-rate data your team uses to optimise campaigns.
Every email in your export runs through the full BounceZero pipeline - no sampling, no shortcuts - delivering up to 99.8% accuracy in internal testing on SMTP-verifiable addresses against an industry benchmark of ~95%.
Live SMTP-level confirmation that the mailbox actually exists - the check that catches contacts who left the company after ZoomInfo last verified them.
Around 23% of B2B domains accept everything. Our 3-probe method resolves catch-all domains that other verifiers give up on and mark "unknown".
Flags info@, sales@ and admin@ addresses that slip into exports - low-intent inboxes that rarely reply and often trigger spam complaints.
Identifies temporary and throwaway domains so short-lived addresses never make it into your CRM or sequences.
Confirms the domain still has functioning mail servers - instantly catching companies that shut down, rebranded, or migrated since export.
Detects recycled addresses converted into spam traps. Hitting even one can land your sender IP on a blocklist overnight.
No plugins, no complex setup. If you can export a CSV, you can verify a list - and be sending within 10 minutes.
Build your segment in ZoomInfo (SalesOS, TalentOS, or Engage) and export contacts to CSV. Include the email column - every other column passes through untouched.
Drag and drop your CSV into the BounceZero dashboard. Dashboard jobs up to 1,000,000 addresses are supported, so even your largest ZoomInfo exports fit in a single job.
All 6 checks execute on every contact - mailbox existence, catch-all resolution, role, disposable, MX, and spam trap screening. A 10K-row export completes in 5-10 minutes.
Get your list back split into Valid, Risky, and Invalid segments with per-email confidence scores, so you decide exactly how aggressive to be with catch-all contacts.
Push the Valid segment back into ZoomInfo Engage or your outreach tool. Cleaned lists consistently see bounce rates under 0.5% - well inside every provider threshold.
Prefer automation? Verify contacts programmatically as they leave ZoomInfo with our real-time API - provider-dependent response time.
You already invested in ZoomInfo data. Protecting that investment costs $3 per 1,000 contacts.
Want the exact numbers for your list size? Try the ROI calculator or see bulk pricing.
Everything sales and ops teams ask before verifying their first ZoomInfo export.
BounceZero works with ZoomInfo through CSV export/import - no plugin required. Export your contact list from ZoomInfo, upload it to BounceZero, and import the cleaned Valid segment back into ZoomInfo Engage or your outreach tool. For automated pipelines, our real-time API (provider-dependent response time) can verify contacts the moment they leave ZoomInfo via your CRM or workflow tool.
ZoomInfo email accuracy typically averages 70-80% at export time. That is strong for a data provider, but B2B email addresses decay at roughly 22% per year as people change jobs, so a meaningful share of any export will bounce if sent unverified.
Expect 20-30% of an unverified ZoomInfo export to be stale or invalid. On a 10,000-contact list, that is 2,000-3,000 hard bounces - more than enough to push your bounce rate past the 2% threshold where Google and Microsoft start throttling your domain.
A typical 10,000-contact export completes in 5-10 minutes through bulk verification. BounceZero supports dashboard jobs up to 1,000,000 addresses, so even enterprise-scale ZoomInfo exports run as a single job.
Around 23% of B2B domains are catch-all, meaning they accept mail for any address. Most verifiers mark these "unknown" and leave you guessing. BounceZero uses a 3-probe catch-all detection method plus confidence scoring, so you get an actionable verdict on catch-all contacts instead of a shrug.
At $3 per 1,000 emails, a 10,000-contact export costs $30 to verify - a fraction of what you paid for the data and far less than the cost of repairing a burned sender domain. Every account also includes 100 free verifications per month with no credit card required.
up to 99.8% accuracy in internal testing on SMTP-verifiable addresses. $3 per 1,000 verifications. Results in seconds. Start with 100 free verifications - no credit card required.
Start Verifying Free100 free verifications/month - Pay as you go - Dashboard jobs up to 1,000,000 addresses
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