Emailfortify compared with ZeroBounce, NeverBounce, Hunter and Kickbox
Every email verifier runs much the same checks. What differs is the price per address, what you pay for an unknown, what extra data sits behind the verdict, and what else comes bundled. Here it is side by side, including where we come out behind.
ZeroBounce alternative: verification without the deliverability suiteA $99 suite or $39 for 2,000 checks, against $9 for 5,000. What the extra money buys, including spam trap detection we don't have.→
NeverBounce alternative: the same checks for a fraction of the price per address$8 per 1,000 against $1.16. What NeverBounce's integrations and auto-sync are worth, and how each tool reads a catch-all.→
Hunter alternative: when you need to verify addresses, not find themHalf a credit per check inside a $49 prospecting plan. When that bundle is worth it, and when a verifier on its own is enough.→
Kickbox alternative: a monthly plan instead of buying in batchesBatches against a $29 month. The arithmetic for one big clean, a regular clean, and verifying at sign-up.→
A reason with every verdict
Deliverable, risky, undeliverable or unknown, plus the reason in plain words ("the mail server says this mailbox doesn't exist") and a score from 0 to 100.
Domain tools free, no account
SPF with its DNS lookups counted against the limit of 10, DKIM at common selectors, DMARC, MX and a one-page domain health report.
Open about how it checks
The server, IP and conversation behind every mailbox check are published. No email is ever sent, and lists are deleted after 30 days.
What a small sender pays
Free plans, the cheapest way in, the price per 1,000 addresses, and the two details pricing pages bury: whether unknown results cost you, and what happens to credits you don't use.
| Free | Cheapest way in | Per 1,000 | Unknown results | Unused credits | |
|---|---|---|---|---|---|
| Emailfortify | 100 a month with any email address, plus 5 a day without an account | $9 a month for 5,000 | $1.80 (Starter), $1.16 (Pro) | Free: the credit goes back | Reset on the 1st of each month |
| ZeroBounce | 100 a month, with a business or premium email domain | $39 for 2,000 (pay as you go); $99 a month for 10,000 (ZeroBounce ONE) | $19.50 pay as you go; $9.90 on ONE | Free | Never expire while subscribed to ONE |
| NeverBounce | Free test credits | $8 per 1,000 (pay as you go); $49 a month for up to 10,000 (Growth) | $8 pay as you go; $4.90 on Growth | Not stated on its pricing page | Pay-as-you-go credits expire 12 months after purchase |
| Kickbox | 100 free verifications | $40 for 5,000; $150 for 25,000 (no subscription) | $8 at 5,000; $6 at 25,000 | Refunded | Not stated on its pricing page |
| Hunter | 50 credits a month (a verification costs half a credit, so 100 checks) | $49 a month for 2,000 credits, which is 4,000 verifications (Starter) | $12.25, with email finding and outreach included | Free | Reset each month |
From each vendor's pricing page, checked October 19, 2026. Per-1,000 figures are the plan price divided by its verifications.
What any verifier can see, by mail provider
A mailbox check is a question to the recipient's mail server, and each provider answers differently. These are the answers our own checks get.
The Yahoo and catch-all rows apply to every verifier that checks over SMTP: when the server says yes to everything, no one can confirm the mailbox without outside data. The Outlook row is ours. Microsoft blocks checks from many cloud server addresses, including the one we use, so until Microsoft clears our address, Outlook.com and Hotmail addresses come back unknown. Those don't use a credit.
The same results under different names
If you're moving from another verifier, this is how its statuses map onto ours.
| What happened | Emailfortify | ZeroBounce | NeverBounce | Kickbox | Hunter |
|---|---|---|---|---|---|
| The mail server confirmed the mailbox | deliverable | valid | valid | deliverable | valid |
| No such mailbox, domain or mail server | undeliverable | invalid | invalid | undeliverable | invalid |
| The domain accepts every address | risky (accept_all) | catch-all | catchall | risky (accept-all) | accept_all |
| A temporary inbox | risky (disposable) | do_not_mail (disposable) | disposable | risky (disposable) | disposable |
| The server gave no clear answer | unknown | unknown | unknown | unknown | unknown |
| Known spam trap or complainer | — | spamtrap, abuse | — | — | — |
From each vendor's documentation, checked October 19, 2026. "—" means no separate status.
When Emailfortify isn't the right choice
- Your list is mostly Outlook.com or Hotmail. Microsoft currently refuses our checks.
- You need spam trap or complainer detection. That takes data about specific addresses, which ZeroBounce has and we don't.
- You want it inside your CRM. NeverBounce lists 80+ integrations; we offer CSV upload and an API.
- You're finding addresses, not checking them. That's Hunter's job.
- You verify more than 25,000 a month. Contact us, or look at Kickbox's batches.
Competitor details from each vendor's own pricing and help pages, checked October 19, 2026. Provider behaviour from our own mailbox checks. Emailfortify facts are from our code and plans.
Clean a whole list
Upload a CSV and get every address checked: syntax, domain, mailbox, catch-all and disposable.
Start with 100 free credits- Finds the email column in any CSV, keeps your other columns
- Deliverable, risky, undeliverable or unknown, with the reason for each
- Download everything, or only the addresses that are safe to send to
- An API for sign-up forms and CRMs
- Lists are deleted after 30 days