WarmerlyWarmerly ahead on this row
5,000 a month on Starter, 25,000 on Growth, 150,000 on Agency.
Warmerly
Mailivery
One-to-one · Email verification
Email verification
One row, in depth: what each tool does, the verified numbers, and who each suits.
Mailivery details read from its pricing page, home page, product pages and API page on 21 October 2026.
Warmerly
5,000 a month on Starter, 25,000 on Growth, 150,000 on Agency.
Mailivery
One-time credits: 100 on Starter, 500 on Professional, 2,000 on Business.
The short answer
Email verification, in one look.
Warmerly includes 5,000 email verifications a month on Starter, 25,000 on Growth and 150,000 on Agency, and they renew. Mailivery lists one-time verification credits: 100 on Starter, 500 on Professional and 2,000 on Business, and describes a two-stage check with a database screen. Both are bundled with the product rather than sold separately, and neither publishes an accuracy figure. Last checked 22 October 2026.
Mailivery
One-time credits: 100 on Starter, 500 on Professional, 2,000 on Business.
The picture
Drawn side by side.
What each checks
As each page describes it
WarmerlyMailivery
A monthly allowance
- Free: 250 a month
- Renews each month
Layers described
- Database screening
- Syntax and domain checks
- Mailbox ping
- Role and disposable detection
Neither company publishes an accuracy figure.
How Warmerly does it
Warmerly, in detail.
A monthly allowance that renews, rising with the plan, with plain recommendations, a confidence score and an optional test send for uncertain addresses.
01
A monthly allowance
Verifications are 250 a month on Free, 5,000 on Starter, 25,000 on Growth and 150,000 on Agency.
Warmerly product, checked 21 October 2026
02
It renews
The allowance is monthly, not a one-time pool.
Warmerly product, checked 21 October 2026
03
Metered with other things
Verifications sit with lookups, exports, placement tests and AI credits as monthly allowances.
Warmerly product, checked 21 October 2026
04
Four plain answers, five underlying statuses
Each result reads Safe to send, Send with caution, Do not send or Unknown, with a confidence score and a one-line reason. Behind those sit valid, invalid, risky, catch-all and unknown.
Warmerly product, checked 21 October 2026
05
Invalid only on hard evidence
An address is marked invalid only for a bad format, no mail server, a disposable domain or a server that says the mailbox does not exist. A blocked or timed-out check stays Unknown, so ambiguity is not turned into a deletion.
Warmerly product, checked 21 October 2026
06
Bulk batches of up to 50,000
Paste addresses or upload a CSV or TXT file. A batch holds up to 50,000 addresses, duplicates are removed, and for lists over 2,000 you are asked to confirm because it uses part of your allowance and cannot be stopped once started.
Warmerly product, checked 21 October 2026
07
Repeat checks are free
A result Warmerly already holds is served instantly and does not use your allowance. It is reused for 30 days when valid, 90 days when invalid, 14 days for catch-all, 7 days for risky and 3 days for unknown.
Warmerly product, checked 21 October 2026
08
A test send for uncertain addresses
For a catch-all, risky or unknown single result you can confirm with one short message from your own connected mailbox and watch for a bounce. It counts as a normal send for that mailbox, is not billed as a separate verification, and cannot settle a true catch-all domain.
Warmerly product, checked 21 October 2026
09
Straight into a campaign
From results you can export CSV or Excel, or add addresses to a campaign. Only Safe to send addresses are added by default, and Do not send and Unknown are never added.
Warmerly product, checked 21 October 2026
10
Also in the API
Single and bulk checks, a history list and a usage read are in the Verify API, which sits behind the Agency plan like the rest of the API.
Warmerly product, checked 21 October 2026
How Mailivery does it
Mailivery, in detail.
Verification is bundled in every plan, with credits that the table calls one-time and a verification page that describes a database screen, an SMTP check and a third-party re-check.
01
One-time credits
The pricing table lists verification credits as one-time: 100 on Starter, 500 on Professional and 2,000 on Business.
mailivery.io/pricing · read 21 October 2026
02
Layers
Its verification page lists database screening, syntax and domain checks, a mailbox ping, role and disposable detection and a re-check through a third-party system.
mailivery.io/email-list-verification · read 21 October 2026
03
Results
Valid, Invalid, Catch-All and Unknown, with downloads by type.
mailivery.io/email-list-verification · read 21 October 2026
04
Inputs
CSV upload, pasted emails or single addresses, with duplicates removed.
mailivery.io/email-list-verification · read 21 October 2026
05
A database screen first
It says every address is first run against an internal database of over 100 million known bad emails, spam traps and flagged actors.
mailivery.io/email-list-verification · read 22 October 2026
06
Double verification
The list is re-verified through an external service after its own checks, which it says is because no tool catches everything.
mailivery.io/email-list-verification · read 22 October 2026
07
A mailbox ping
It tests the SMTP connection to see whether the address exists, and says it does so without risking deliverability.
mailivery.io/email-list-verification · read 22 October 2026
08
Role and disposable detection
Its page lists syntax and domain validation, role-based and disposable address detection among the checks.
mailivery.io/email-list-verification · read 22 October 2026
09
Live status while it runs
It shows Processing, Verified and Error as a list is checked, and auto-detects and maps the email column in an upload.
mailivery.io/email-list-verification · read 22 October 2026
10
Why it says it matters
It lists higher bounce rates, damaged IP and domain reputation, blacklisting and ESP suspension as the risks of sending to invalid addresses.
mailivery.io/email-list-verification · read 22 October 2026
11
Extra credits
Its pricing page says additional verification credits can be purchased within the platform. It gives no price.
mailivery.io/pricing · read 22 October 2026
What Mailivery does not say
We looked, and found no statement on these. That is about its published pages only, not about the product.
- Accuracy rates
- Which third-party service is used
- List size limits
- Whether credits renew each month
- A price for extra verification credits
- Whether verification covers addresses already inside a warm-up network
- A statement on how catch-all addresses are scored
Where the sources disagree
We report each version rather than pick one.
- Its verification page says verification is included in all plans and gives no credit counts, while its pricing table lists them.
The numbers
Only what we could verify.
| Measure | Warmerly | Mailivery |
|---|---|---|
| Email verification | 5,000 a month on Starter, 25,000 on Growth, 150,000 on Agency. | One-time credits: 100 on Starter, 500 on Professional, 2,000 on Business. |
| Verifications on a starting plan | 5,000 a month | 100 one-time credits |
| Verifications on the top published plan | 150,000 a month | 2,000 one-time credits |
| Free plan allowance | 250 a month | No free plan listed |
| Credit model | Monthly allowance, resets on the 1st | One-time, per its pricing table |
| Largest batch | 50,000 addresses | Not stated |
| Repeat checks | Free within the memory window | Not stated |
| Result types | Valid, invalid, risky, catch-all, unknown | Valid, invalid, catch-all, unknown |
| Checks described | Format, mail server, mailbox, catch-all, disposable, shared inbox, free provider | Database screen, syntax, mailbox ping, role and disposable, third-party re-check |
In practice
What it means for you.
Our reading of the facts above. Not a promise, and not the only reasonable reading.
Check what you need
If you verify lists of a few thousand at a time, a monthly 5,000 covers it. A hundred credits is a spot check.
Its layers are described
Mailivery explains how it verifies. We do not publish accuracy figures either.
A 2,000 address list
On Mailivery's Business plan that one list would use all 2,000 one-time credits. On Warmerly Starter it uses 2,000 of a monthly 5,000 and the allowance comes back on the 1st.
Counting the credits you get for the price
Mailivery's Starter costs $29 a month and lists 100 credits. Professional at $79 lists 500, and Business at $199 lists 2,000. If you verify large lists often, the table suggests buying credits, which its page says you can do in the platform.
Re-checking the same list
Run the same 1,000 addresses again within a week and Warmerly serves the known results free, apart from any marked unknown, which are held for three days. Mailivery does not say whether a re-run costs credits.
A catch-all heavy list
Google Workspace and Microsoft 365 domains often answer for any address, so many business contacts come back catch-all on any tool. Warmerly says so plainly and offers a test send for single addresses. Mailivery lists Catch-All as a result but does not describe how it handles them.
Verifying before a campaign, not after
Both products position verification as the step before sending. Warmerly lets you add the Safe to send results straight into a campaign. With Mailivery you export by result type and import into whatever sender you use.
Who it suits
Pick the one that fits.
Warmerly
Warmerly is the better fit if
- You verify lists regularly and want a monthly allowance
- You want verification inside the same app as campaigns
- You verify thousands of addresses a month and want the allowance to renew
- You want results to go straight into a campaign
- You want plain recommendations as well as raw statuses
Mailivery
Mailivery is the better fit if
- You want a described multi-layer check with a database screen
- You verify only occasionally
- You want a screen against a large internal database of bad addresses and spam traps
- You want a second, third-party pass on every list
Questions
How many verifications does Warmerly include?
250 a month on Free, 5,000 on Starter, 25,000 on Growth and 150,000 on Agency.
How many does Mailivery include?
Its pricing table lists one-time credits: 100 on Starter, 500 on Professional and 2,000 on Business.
Do Warmerly verification allowances renew?
Yes. The allowance is monthly and resets on the 1st. Results Warmerly already holds are free to repeat within their memory window.
What does Warmerly do with catch-all addresses?
It marks them catch-all and Send with caution, because a server that accepts everything cannot confirm one mailbox. It never turns that ambiguity into Invalid.
Does Mailivery use a database of bad addresses?
Its verification page says it screens against an internal database of over 100 million known bad emails, spam traps and flagged actors, then checks the mailbox and re-verifies through a third-party service.
Sources
Mailivery pages were read on 21 October 2026. Plans and wording change, so check the vendor's own page before you decide. Warmerly details come from the product as it runs today.
More features
See it on your own mailbox.
Connect a mailbox. Warmerly runs alongside whatever you send from now, so you can compare before you move anything.
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