Email verification with deep ESP integrations, now part of the ZoomInfo stack.
NeverBounce is one of the longest-running email verification services, founded in 2014 and acquired by ZoomInfo in 2020. The product runs the same fundamental check as Emailable, ZeroBounce and Kickbox: per-address SMTP verification with catch-all detection, role-account flagging, disposable-domain detection and free-mail tagging. The differentiator is breadth of ESP integrations — NeverBounce is often the default verifier already plumbed into Mailchimp, HubSpot, Salesforce, Pardot, Marketo and dozens of others — and a generous 1,000-credit free tier that beats most rivals.
Upload a CSV, post addresses to the API, or trigger verification from inside an integrated ESP. NeverBounce runs syntax validation, MX lookup, SMTP handshake, catch-all detection and disposable-domain matching, returning a verdict (valid, invalid, accept-all, disposable, unknown) plus sub-flags. Real-time API verification returns in under a second; bulk runs at roughly 250,000 addresses per hour. Native integrations cover Mailchimp, HubSpot, Salesforce, ActiveCampaign, Constant Contact, Pardot, Marketo and Eloqua, with Zapier and webhooks for the rest.
The free tier is 1,000 verifications, generous versus Emailable's 250 and Kickbox's 100. Pay-as-you-go starts at $10 for 1,000 credits and slides to roughly $0.003 per credit at million-plus volumes. Monthly subscriptions start at $50/month. Enterprise plans add SSO, dedicated support and volume commits. NeverBounce sits roughly in line with ZeroBounce on price and slightly above Emailable for SMB-volume buyers. Where NeverBounce wins on cost is bundled into existing ZoomInfo contracts, where it is usually included rather than billed separately.
| Tool | Free credits | Starter price | Strengths | Weaknesses |
|---|---|---|---|---|
| NeverBounce | 1,000 | ~$10 / 1k | ESP integration depth, ZoomInfo bundle | UI feels dated |
| Emailable | 250 | ~$30 / 5k | Cleaner UI, cheaper at SMB volume | Smaller brand |
| ZeroBounce | 100 | ~$16 / 2k | Activity score, AI scoring | Pricier per credit |
| Kickbox | 100 | ~$10 / 1k | Sendex quality score | Slower bulk |
Buy if: your team is already on ZoomInfo, where NeverBounce verification is usually bundled or steeply discounted; you use Mailchimp, HubSpot, Salesforce or Marketo and want the verifier with the deepest native integration; you need to clean a list once before a big send and 1,000 free credits is enough.
Skip if: you prefer a more modern dashboard and slightly cheaper SMB pricing — Emailable or Kickbox are stronger choices; you are an enterprise buyer who has already negotiated ZeroBounce or Briteverify into a stack-wide contract; your verification is purely API-driven and the ESP integration breadth is irrelevant.
1,000 free verifications on signup. Pay-as-you-go from $10 per 1,000 credits, monthly subscriptions from $50/month.
Marketers upload subscriber lists to NeverBounce before sending campaigns, removing invalid addresses to improve open rates and sender reputation. This is especially critical after list acquisition or long periods of inactivity.
RevOps teams integrate NeverBounce's API into landing page forms to catch typos and invalid domains on entry. This reduces bad data flowing into CRM and improves lead quality scoring.
Founders use NeverBounce to maintain high sender reputation scores, which directly impacts email delivery rates and inbox placement. Critical for onboarding flows, transactional emails, and retention campaigns.
Quarterly access to product leadership.
Bonus credits redeemable on partner tooling.
We re-verify the offer every quarter so it never goes stale.
Hit the button on this page — opens the partner site in a new tab.
Check your investor or accelerator benefits portal for the NeverBounce partner code. Y Combinator, Sequoia, and most Tier 1 VCs have codes available.
Renewals stay at the same rate — verified by us, not the vendor.
| Feature | NeverBounce |
|---|---|
| Free trial | 14 days |
| Cheapest paid plan | $0/mo |
| Annual discount | Up to 25% |
| Refund window | 30 days |
| Setup time | < 1 hour |
| Best for | Founders |
“Reliable verification, competitive for mid-volume use”
“Real-time API catches bad emails at signup”
“Cleaned our list and reduced bounce rate from 4.2% to 0.7%”
