Apollo is the #1 lead source for cold email - and the #1 source of email bounces. BounceZero processes your full Apollo export in minutes, flagging exactly which contacts to drop.
Apollo.io is a phenomenal prospecting database - but its 275M+ contacts are aggregated and pattern-guessed, not live-verified at export time. Sending raw exports is how domains get burned.
Apollo builds many emails from name + domain patterns ([email protected]). A meaningful slice of every export was never confirmed to exist - and it bounces the moment you hit send.
B2B contacts change jobs constantly. An email that was valid when Apollo indexed it may be dead by the time you export it. Older database entries decay at roughly 22% per year.
Around 23% of B2B domains accept mail for any address, so Apollo marks them "verified" even when the mailbox is fake. These slip through basic checks and quietly wreck deliverability.
Every email in your Apollo.io export runs through the full BounceZero verification pipeline - not just a syntax pass.
We connect to the mail server and confirm the exact mailbox exists - catching the pattern-guessed addresses Apollo never confirmed.
Our triple-probe test identifies catch-all domains and scores real deliverability instead of blindly trusting an "accept-all" server.
Flags info@, sales@ and admin@ addresses that rarely convert in cold outreach and often trigger spam complaints.
Filters temporary and throwaway domains that occasionally leak into scraped B2B databases.
Confirms the domain still has live mail servers - catching companies that shut down or migrated since Apollo indexed them.
Detects recycled addresses converted into spam traps - the single fastest way to get your sending domain blacklisted.
From raw Apollo.io export to send-ready list in about ten minutes. No plugins, no API keys required.
In Apollo.io, select your saved list or search results and export to CSV. Include the email column - everything else passes through untouched.
Drag your CSV into the BounceZero dashboard. We auto-detect the email column and handle up to 1,000,000 addresses per dashboard job.
All 6 checks run on every address - mailbox existence, catch-all probing, role, disposable, MX and spam trap screening. A 10K export finishes in 5-10 minutes.
Get your list back split into Valid, Risky (catch-all) and Invalid - with all your original Apollo columns preserved.
Re-import the Valid segment into Apollo.io sequences or your sending tool of choice, and launch knowing your bounce rate stays under 0.5%.
Less than the cost of one burned sending domain. Simple flat pricing - $3 per 1,000 verifications, no subscriptions.
Common questions about verifying Apollo.io email exports in bulk.
BounceZero works with Apollo.io through CSV export/import - no plugin or connector needed. Export your list from Apollo.io, upload the CSV to BounceZero, and re-import the cleaned Valid segment in minutes. Developers can also automate the loop with our REST API at provider-dependent response time.
Apollo verification is done at indexing time, not export time - and B2B emails decay at roughly 22% per year as people change jobs. Apollo also marks catch-all domains as verified even though the specific mailbox may not exist. BounceZero verifies each address live, at the moment you upload, with catch-all 3-probe detection.
A typical 10,000-contact Apollo.io export takes 5-10 minutes. BounceZero supports up to 1,000,000 addresses per dashboard job, so even the largest Apollo exports process in a single upload.
No. BounceZero preserves every column from your Apollo.io CSV - names, titles, companies, LinkedIn URLs - and simply appends verification results. Your re-import into Apollo.io or your sequencer maps cleanly.
Around 23% of B2B domains are catch-all. Our 3-probe detection scores how likely each catch-all address is to be real. Most teams send Valid contacts first, then test Risky contacts from a separate warmed domain in small batches to protect their primary sender reputation.
Pricing is a flat $3 per 1,000 verifications - a 10K Apollo export costs $30, a 100K export costs $300. You also get 100 free verifications every month with no credit card required, so you can test with a sample of your list first.
Verify your first 100 Apollo.io contacts free - no credit card, results in minutes. up to 99.8% accuracy in internal testing on SMTP-verifiable addresses, $3 per 1,000 after that.
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