Speed vs. Depth: Choosing the right tool for your verification needs.
NeverBounce (ZoomInfo) prioritizes speed, often skipping deep checks on complex domains to return results instantly. EmailAddress.ai prioritizes depth, taking the extra milliseconds needed to penetrate "Accept All" firewalls.
NeverBounce is famous for its speed and sleek interface. It was acquired by ZoomInfo to power their vast data ecosystem. However, in the verification world, speed often comes at the cost of accuracy.
When NeverBounce pings a corporate server and receives an "Accept All" response (meaning the server doesn't immediately reject invalid emails), it stops there. It marks the email as "Unverifiable" or "Accept All".
This is where we differ. EmailAddress.ai treats an "Accept All" response as the start of the verification process, not the end. We continue to query the server using different protocols until we find a definitive signal.
"Verify as fast as possible. If it takes too long, mark it unknown."
"Verify as accurately as possible. Take extra time to resolve firewalls."
| Feature | NeverBounce | EmailAddress.ai |
|---|---|---|
| B2B Accuracy | Moderate (Struggles with Firewalls) | High (Deep-SMTP) |
| Result Categories | Valid, Invalid, Accept All, Unknown | Deliverable, Undeliverable, Risky |
| Cost Efficiency | Expensive (~$0.008/email) | Affordable (~$0.0045/email) |
| Credit Expiry | Credits expire after 365 days | Pay-as-you-go never expires |
| Instant API | Yes (Real-time) | Yes (Real-time) |
You should use NeverBounce if you are already deeply integrated into the ZoomInfo ecosystem and want seamless credit sharing, or if you need to clean a massive list (1M+) in minutes rather than hours and don't mind losing 10-20% of the leads to "Accept All" statuses.
You should use EmailAddress.ai if every lead counts. For ABM (Account Based Marketing) and high-ticket sales, losing 20% of your list to "Accept All" statuses is unacceptable. We recover those leads so your sales team has more targets.
NeverBounce charges a premium for their brand. For 10,000 verifications, you pay significantly more for less actionable data.
Run a free test on your hardest list. See how many "Unknowns" we resolve into "Deliverable" leads.