Warmerly
5 on Starter, 25 on Growth, 100 on Agency; Max is custom.
Warmerly
Mailivery
One-to-one · Mailboxes covered
Mailboxes covered
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 on Starter, 25 on Growth, 100 on Agency; Max is custom.
Mailivery
Unlimited mailboxes on every plan, as its pricing page puts it.
The short answer
Mailboxes covered, in one look.
Warmerly connects 5 mailboxes on Starter, 25 on Growth and 100 on Agency. Mailivery lists unlimited mailboxes on all three plans, and limits the daily warm-up volume instead. Both connect Gmail, Google Workspace and Microsoft 365. Last checked 22 October 2026.
MailiveryMailivery ahead on this row
Unlimited mailboxes on every plan, as its pricing page puts it.
The picture
Drawn side by side.
On screen
What it looks like.
WarmerlySample data
How Warmerly does it
Warmerly, in detail.
A fixed mailbox count on every plan, shown next to the price. Disconnecting a mailbox frees its slot at once, and Warmerly-hosted mailboxes do not use a slot.
01
5, 25 or 100
Starter connects 5 mailboxes, Growth 25 and Agency 100. Free connects 1.
Warmerly product, checked 21 October 2026
02
More than 100
Max is a custom plan for teams that need more than 100 mailboxes.
Warmerly product, checked 21 October 2026
03
Hosted mailboxes are separate
Mailboxes Warmerly hosts for you (OneMail) do not use a plan mailbox slot.
Warmerly product, checked 21 October 2026
04
Gmail, Google Workspace and Microsoft 365
Connect Gmail or Google Workspace with an app password, or sign in with Microsoft 365.
Warmerly product, checked 21 October 2026
05
Capacity is a live count
Mailboxes are counted as they stand, not as a monthly total. There is nothing to reset: disconnect a mailbox and the slot is free immediately.
Warmerly product, checked 21 October 2026
06
Each mailbox warms by its own ramp
Warmup is not split across mailboxes. Each mailbox has a warmup day, a daily limit and a reason for that limit, shown in the Mailboxes and Warmup views.
Warmerly product, checked 21 October 2026
07
Sending per mailbox
Each mailbox sends 30 a day by default, lower while it is still ramping. Five mailboxes at 30 a day is roughly 150 sends a day.
Warmerly product, checked 21 October 2026
08
Free is one mailbox
Free connects 1 mailbox, with 1 active campaign and 100 campaign sends a month, and no card is needed.
Warmerly product, checked 21 October 2026
09
Cost per mailbox
At the monthly price a mailbox is $3.80 on Starter, $1.96 on Growth and $1.79 on Agency.
Warmerly product, checked 21 October 2026
How Mailivery does it
Mailivery, in detail.
Unlimited mailboxes on every plan, held in check by the shared daily warm-up volume and a per-inbox daily limit. It names Gmail, Microsoft 365, Zoho, Amazon SES, SendGrid, Mailgun and any SMTP.
01
Unlimited on all three plans
The pricing page says UNLIMITED mailboxes on Starter, Professional and Business.
mailivery.io/pricing · read 21 October 2026
02
The only limit is volume
Its warm-up page says the only limit is your daily warm-up volume, and gives splits such as 80 inboxes at 10 a day or 20 at 40 a day as illustrations.
mailivery.io/email-warm-up · read 21 October 2026
03
Providers
It names Gmail, Google Workspace, Microsoft 365, Outlook, Yahoo, Zoho, SendGrid, Amazon SES, Mailgun and any SMTP.
mailivery.io/email-warm-up · read 21 October 2026
04
A per-inbox limit
Its pricing FAQ gives a current limit of 250 emails a day per connected inbox, to protect network quality.
mailivery.io/pricing · read 21 October 2026
05
A user is not a mailbox
A user is a person with a login, and one user can connect many mailboxes. Starter allows 2 users, Professional 4 and Business 10.
mailivery.io/pricing · read 22 October 2026
06
Google mailboxes need an app password
Its how-it-works page says Google mailboxes require an app password for connection, and that you can connect mailboxes from several providers in one account.
mailivery.io/how-it-works · read 22 October 2026
07
Warm each address on a shared domain
It says that with several addresses on one domain, each address should be warmed individually to generate enough positive signal at the domain level.
mailivery.io/how-it-works · read 22 October 2026
08
Setup in under two minutes
It says you can link Gmail, Outlook or any SMTP provider in under two minutes, with no per-inbox charge.
mailivery.io/email-warm-up · read 22 October 2026
09
Dedicated folders for warm-up mail
Warm-up messages are organised into a dedicated folder or label so they stay apart from real correspondence.
mailivery.io/how-it-works · read 22 October 2026
10
Bulk settings
Its comparison page lists bulk editing of warm-up settings such as emails a day and reply rate across hundreds of accounts as a feature.
mailivery.io/competitor-comparison · 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.
- A maximum number of connected mailboxes
- How its shared volume is split between mailboxes by default
- Whether a mailbox can be paused without losing its history
- What happens to the warm-up history of a mailbox you remove and reconnect
- A published count of how many mailboxes a typical account connects
Where the sources disagree
We report each version rather than pick one.
- Per-inbox limit: its pricing table shows a daily limit of 100 per mailbox on Starter and 250 on Professional and Business, while its FAQ says the current limit for each inbox is 250 emails a day.
The numbers
Only what we could verify.
| Measure | Warmerly | Mailivery |
|---|---|---|
| Mailboxes covered | 5 on Starter, 25 on Growth, 100 on Agency; Max is custom. | Unlimited mailboxes on every plan, as its pricing page puts it. |
| Mailboxes on the starting plan | 5 | Unlimited |
| Mailboxes in the biggest published plan | 100 on Agency | Unlimited |
| Mailboxes on a free plan | 1 | No free plan listed |
| Mailboxes on the middle plan | 25 on Growth | Unlimited on Professional |
| Users on the starting plan | Not compared here | 2 |
| Daily limit per mailbox | 30 sends a day by default | 250 emails a day per inbox, per its FAQ |
| Share of the volume at 20 mailboxes on the starting plan | Own ramp per mailbox | 10 a day each if split evenly (200 divided by 20) |
| Slots used by a hosted mailbox | None | Not stated |
The plans
Every plan, side by side.
Warmerly
Free$01 mailbox · capped sends · no card
Starter$195 mailboxes · no cap on sends
Growth$4925 mailboxes · no cap on sends
Agency$179100 mailboxes · client workspaces · API
MaxCustomMore than 100 mailboxes
Mailivery
Starter$29Unlimited mailboxes · up to 200 warm-up emails a day shared · $21.75 yearly
Professional$79Unlimited mailboxes · up to 800 a day shared · $59.25 yearly
Business$199Unlimited mailboxes · up to 2,500 a day shared · $149.25 yearly
Higher volumeCustomCustom pricing by contact, no figure shown
Per month, billed monthly. Mailivery prices were read on mailivery.io/pricing on 21 October 2026; the page also shows two per-account cards ($80 and $140 a month) that it does not explain. Warmerly's email plans cover mailboxes; its LinkedIn add-on is charged per account on top.
In practice
What it means for you.
Our reading of the facts above. Not a promise, and not the only reasonable reading.
Unlimited helps at scale
If you run well beyond 100 mailboxes, a plan with no mailbox limit is simpler than a custom Max plan.
Volume still binds
On Mailivery the volume cap divides across mailboxes, so a larger fleet means less warm-up each unless you move up a plan.
A team of ten mailboxes
Warmerly Growth covers up to 25 mailboxes at $49, so ten mailboxes use Growth with 15 slots to spare. Mailivery Starter at $29 covers ten mailboxes at 20 warm-up emails a day each, if you split the 200 evenly.
An agency with forty client mailboxes
Warmerly needs Agency at $179, since Growth stops at 25. Mailivery Professional at $79 gives each of 40 mailboxes 20 a day from its 800 pool, an even split that is your own setting.
Two mailboxes on one domain
Mailivery says to warm each address on a domain individually. Warmerly also ramps each mailbox on its own, so a second address on a domain starts its own day count.
What the case study claims
Mailivery's own story says 100 mailboxes were covered for $199 a month. On Warmerly 100 mailboxes is $179 on Agency. We cannot check its story, and the plans buy different things.
Who it suits
Pick the one that fits.
Warmerly
Warmerly is the better fit if
- You run 5 to 25 mailboxes and want a clear price for that count
- You want each mailbox to warm by its own ramp
- You want a hosted mailbox that does not use a plan slot
- You like a ramp that each mailbox follows on its own
Mailivery
Mailivery is the better fit if
- You run many mailboxes and want no limit on count
- You want to set how much warm-up each mailbox gets
- You connect mailboxes from Zoho, Amazon SES, SendGrid or Mailgun and want them named
- You want to give each team member a login with their own mailboxes
Questions
How many mailboxes can I connect to Warmerly?
1 on Free, 5 on Starter, 25 on Growth and 100 on Agency. More than 100 is a custom Max plan.
Is Mailivery really unlimited?
Its pricing page says so on every plan. The practical limit is the daily warm-up volume that all your mailboxes share.
Does Mailivery work with Gmail?
Yes, through an app password, according to its how-it-works page. It also names Google Workspace, Microsoft 365, Outlook, Zoho, Yahoo, SendGrid, Amazon SES, Mailgun and any SMTP.
Do Warmerly's hosted mailboxes count against my plan?
No. Mailboxes Warmerly hosts for you do not use a plan mailbox slot.
What is the daily limit for one mailbox?
On Warmerly, 30 sends a day by default, lower while a mailbox ramps. On Mailivery, its FAQ gives 250 emails a day for each connected inbox.
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.
Free plan, no card. Paid plans: 7-day trial, first charge on day 8.