NeverBounce is an email verification and list-cleaning service: upload a list or call the API to find addresses likely to bounce before you send.
isBusinessEmail is not a list cleaner. It classifies the domain behind an address so B2B products can tell company signups from personal ones, and see whether the company runs Google Workspace or Microsoft 365.
Side by side, in plain terms
| Need | Better fit |
|---|---|
| Remove bounces from a marketing list | A verifier such as NeverBounce |
Block or flag @gmail.com signups on a B2B product |
isBusinessEmail |
| Detect disposable and relay addresses at signup | isBusinessEmail (verifiers often flag disposables too; check their docs) |
| Know if a company uses Microsoft 365, and its tenant ID | isBusinessEmail |
| Route leads by company suite | isBusinessEmail |
| Confirm a specific mailbox exists | A verifier |
For NeverBounce’s current features and pricing, check their site.
What you get from isBusinessEmail
category: business, personal, disposable, relay, education, government, invalid, unknownrecommendation: allow, review or block, underb2b,strictorlenientpoliciesworkspace: Google Workspace / Microsoft 365 detection, tenant ID, region, federation and identity providerreasons: explainable signals for every verdict- No mailbox probing, no full addresses stored, EU database
- Free, with fair-use limits
A common combined setup
- Signup: isBusinessEmail decides allow / review / block and stores the suite on the account.
- Onboarding: the stored suite pre-selects the Google or Microsoft connector.
- Before campaigns to old lists: a verifier removes undeliverable addresses.