Unbounz tells you whether an email address is real, risky, or a waste of a send — one at a time, a million at once, or straight from your code via API.
No credit card · results in seconds · 1 credit = 1 email
We check the address format and confirm the domain actually runs mail servers (MX).
We open a real SMTP conversation with the mail server to see if the specific mailbox exists.
Catch-all, role, disposable and typo signals become one 0–100 confidence score you can act on.
Drop in a CSV of any size. We de-dupe, group by domain to stay polite to mail servers, and hand back a labelled file.
One REST endpoint, bearer-key auth, JSON in and out. Validate at signup, checkout, or form submit.
1 credit per address, cached results are free, and credits never expire. Reserve-on-start means you’re never overcharged.
We flag domains that accept everything so you can weigh the risk instead of trusting a false “valid”.
Throwaway and temporary-mail domains are caught before they pollute your metrics.
“gmial.com” → “gmail.com”. Recover addresses you’d otherwise have lost.
Buy a pack, spend it whenever. No subscriptions, no expiry.
Questions about volume pricing, on-prem, or the API? Send a note — we verify your email as you type, so replies actually reach you.