Apollo's database is powerful, but email addresses decay at 22% per year. BounceZero verifies every lead's address in real time - removing invalids Apollo can't catch before your outreach campaign fires.
100 free verifications/month - No credit card required
Apollo.io is one of the best B2B prospecting databases in the world - but no static database can keep pace with people changing jobs. Independent tests put Apollo email accuracy at 70-85%. That gap lands in your bounce column.
B2B email addresses decay at roughly 22% per year as people switch companies. An Apollo contact scraped or confirmed 8 months ago has a meaningful chance of being dead today - and Apollo has no way to re-check every record before you export it.
With 70-85% average accuracy, a 10,000-lead Apollo export typically contains 1,500-3,000 addresses that will hard-bounce. Mailbox providers start throttling senders at just a 2% bounce rate - well below what an unverified list produces.
Every hard bounce damages the reputation of the domain and IPs behind your sequences. Once Google or Microsoft flag your domain, even valid Apollo leads stop seeing your emails - and recovering deliverability takes weeks.
Every address from your Apollo.io export passes through the full BounceZero pipeline - results in seconds, with a clear verdict and confidence score per lead.
We connect to the recipient mail server and confirm the exact mailbox exists - catching leads who left the company after Apollo indexed them.
Around 23% of B2B domains accept all mail. Our 3-probe technique separates genuinely deliverable addresses from risky catch-all noise other tools mark "valid".
Flags info@, sales@ and admin@ addresses that slip into Apollo exports - low-intent inboxes that hurt reply rates and trigger spam complaints.
Identifies temporary and throwaway domains so they never enter your sequences or skew your campaign metrics.
Confirms the domain still has live, correctly configured mail servers - dead domains are a common failure mode in aging database records.
Screens against known spam trap patterns and recycled addresses. One trap hit can blocklist your entire sending infrastructure.
Five steps from raw Apollo export to a send-safe list. A 10,000-lead file is verified in 5-10 minutes.
Build your list in Apollo.io as usual, then export it to CSV. Keep the email column plus any fields you want to preserve - BounceZero returns your file with all original columns intact.
Drag and drop the export into the BounceZero dashboard. We auto-detect the email column and deduplicate. Dashboard jobs up to 1,000,000 addresses are supported.
Each lead runs through all 6 checks - mailbox existence, catch-all 3-probe, role, disposable, MX, and spam trap screening. A 10K-row Apollo export completes in about 5-10 minutes.
Get your file back split into Valid, Risky (catch-all), and Invalid, with a confidence score per address. Only the Valid segment goes into your sequences.
Re-import the cleaned CSV into Apollo.io (or push it straight to your sequencer) and start your campaign knowing your bounce rate will stay under 0.5%.
Verifying leads programmatically? Our real-time API responds with timing that varies by provider and verification path on average - validate Apollo leads the moment they enter your CRM.
$3 per 1,000 verifications. Compare that with what unverified bounces cost your domain reputation and wasted sequencer credits.
Want the exact numbers for your list size? Try the ROI calculator or see bulk pricing tiers.
Common questions from teams verifying Apollo.io leads with BounceZero.
Yes - via CSV workflow and API. Export any list from Apollo.io to CSV, upload it to BounceZero, and re-import the cleaned file in minutes. For automated pipelines, our real-time API (provider-dependent response time) can verify each lead as it syncs from Apollo.io into your CRM or sequencer, so no manual export step is needed.
Apollo marks emails as "verified", "likely" or "guessed", but that status reflects when the record was last checked - which may be months ago. With B2B addresses decaying at 22% per year, independent tests put real-world Apollo accuracy at 70-85%. BounceZero re-verifies every address live, at send time, with up to 99.8% accuracy in internal testing on SMTP-verifiable addresses.
Around 23% of B2B domains are catch-all, meaning the server accepts mail for any address - so a simple SMTP check can't tell real from fake. BounceZero's 3-probe catch-all technique scores deliverability confidence for these addresses so you can send to high-confidence catch-alls and drop the rest, instead of discarding a quarter of your Apollo list.
Typically 5-10 minutes for a 10K-row file, and single dashboard jobs scale up to 1,000,000 addresses. You get the results back segmented into Valid, Risky, and Invalid, with your original Apollo columns (name, company, title, etc.) preserved.
Directly and indirectly. Directly, you stop wasting sequencer sends on dead inboxes. Indirectly - and more importantly - keeping bounces under 0.5% protects your sending domain's reputation, which means more of your emails land in the primary inbox instead of spam, where replies actually happen.
BounceZero costs $3 per 1,000 verifications with no subscription - cleaning a full 10K Apollo export costs $30. You also get 100 free verifications every month with no credit card, so you can test the workflow on a small Apollo segment before committing.
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 every month - no credit card required.
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