WarmerlyWarmerly ahead on this row
5 on Starter, 25 on Growth, 100 on Agency; Max is custom.
Warmerly
Mailwarm
One-to-one · Mailboxes covered
Mailboxes covered
One row, in depth: what each tool does, the verified numbers, and who each suits.
Mailwarm details read from its pricing page, home page, features page, SMTP warmup page and about page on 21 October 2026.
Warmerly
5 on Starter, 25 on Growth, 100 on Agency; Max is custom.
Mailwarm
1 on Starter, 3 on Growth, 10 on Scale; Tailored is custom and lists unlimited.
The short answer
Mailboxes covered, in one look.
Warmerly covers 5 on Starter, 25 on Growth and 100 on Agency, with Max custom above that. Mailwarm covers 1 mailbox on Starter, 3 on Growth and 10 on Scale, with unlimited on a custom Tailored plan. Last checked 22 October 2026.
Mailwarm
1 on Starter, 3 on Growth, 10 on Scale; Tailored is custom and lists unlimited.
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.
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
Free is 1 mailbox
The Free plan connects 1 mailbox, with no card and no end date. Warmup on it is included and not metered.
Warmerly product, checked 21 October 2026
05
The count is live, not monthly
Mailboxes are a capacity limit: a live count with nothing to reset. Disconnect a mailbox and the slot is free at once.
Warmerly product, checked 21 October 2026
06
What happens at the limit
Connecting a mailbox beyond your allowance is refused at that moment with an explanation. Nothing is charged and nothing is lost. A workspace that drifts over, for example after a downgrade, gets 30 days to fix it, and nothing is deleted.
Warmerly product, checked 21 October 2026
07
Hosted mailboxes use no slot
Hosted OneMail mailboxes and the free sandbox mailbox do not use a plan mailbox slot, so a plan's count is only the mailboxes you connected yourself.
Warmerly product, checked 21 October 2026
08
Warmup on every mailbox
Every mailbox on every plan gets warmup, and warmup emails are not metered. Each one follows the same ramp, from 4 a day on day 0 to 50 a day by day 30, held lower by provider.
Warmerly product, checked 21 October 2026
09
Sending volume is mailboxes times a limit
Paid plans are sold on mailboxes and leads, not on emails sent. What bounds volume is mailboxes multiplied by each mailbox's own daily limit, 30 a day by default and lower while ramping.
Warmerly product, checked 21 October 2026
10
Connected both ways before it is saved
Warmerly signs in to SMTP and IMAP before it saves a mailbox, so a mailbox that connects will work. Test connection runs the same check later.
Warmerly product, checked 21 October 2026
How Mailwarm does it
Mailwarm, in detail.
1, 3 and 10 mailboxes on the three priced tiers; unlimited only on the custom plan.
01
Starter, Growth, Scale
1, 3 and 10 mailboxes or SMTPs.
mailwarm.com/pricing · read 21 October 2026
02
Users per plan
1 user on Starter, 2 on Growth, 5 on Scale.
mailwarm.com/pricing · read 21 October 2026
03
Tailored
Lists unlimited mailboxes and users, price on request.
mailwarm.com/pricing · read 21 October 2026
04
Multiple domains
Its FAQ says inboxes can be warmed across multiple domains.
mailwarm.com/pricing · read 21 October 2026
05
Add mid-month
Its FAQ says you can add inboxes instantly, with no wait for a billing reset.
mailwarm.com/pricing · read 21 October 2026
06
Warm-up emails a day by tier
Up to 50 a day on Starter, 200 on Growth and 500 on Scale, with the same figure given for replies. The page does not say whether the daily figure is per mailbox or per plan.
mailwarm.com/pricing · read 22 October 2026
07
Positive interactions by tier
200+ on Starter, 800+ on Growth and 2000+ on Scale. The page does not define an interaction beyond its four listed actions.
mailwarm.com/pricing · read 22 October 2026
08
Per mailbox, the price is steep at the start
At its listed prices, the cost per mailbox is $69 on Starter, $53 on Growth ($159 for 3) and $47.90 on Scale ($479 for 10). That is our arithmetic on its annual-billing prices, not a figure it publishes.
mailwarm.com/pricing · read 22 October 2026
09
What counts as a mailbox
Its tiers say mailbox or SMTP, so a connected SMTP account takes a slot just as a mailbox does.
mailwarm.com/pricing · read 22 October 2026
10
Team seats
Users are 1, 2 and 5 on its three tiers, and its FAQ says teams can invite members and manage access across multiple inboxes and domains.
mailwarm.com/pricing · read 22 October 2026
11
Multi-inbox and team control
Its features page describes managing multiple inboxes from one platform, domain-level warmup strategies and centralised control for outbound teams.
mailwarm.com/features · read 22 October 2026
What Mailwarm does not say
We looked, and found no statement on these. That is about its published pages only, not about the product.
- The price of Tailored
- A mailbox limit per domain
The numbers
Only what we could verify.
| Measure | Warmerly | Mailwarm |
|---|---|---|
| Mailboxes covered | 5 on Starter, 25 on Growth, 100 on Agency; Max is custom. | 1 on Starter, 3 on Growth, 10 on Scale; Tailored is custom and lists unlimited. |
| Mailboxes on the starting plan | 5 | 1 |
| Mailboxes in the biggest priced plan | 100 on Agency | 10 on Scale |
| Beyond that | Max, custom | Tailored, custom, unlimited |
| Mailboxes on the Free plan | 1 | No free plan |
| Mailboxes on the second tier | 25 on Growth | 3 on Growth |
| Price for 10 mailboxes | $49 on Growth (25 mailboxes) | $479 on Scale |
| Users on the starting plan | Roles for a team, Owner, Admin and Member | 1 user |
| Hosted mailboxes | Do not use a plan slot | 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
Mailwarm
Starter$691 mailbox · up to 50 warm-up emails a day · 1 expert call a month
Growth$1593 mailboxes · up to 200 a day · 4 expert calls a month
Scale$47910 mailboxes · up to 500 a day · expert calls on demand
TailoredCustomUnlimited mailboxes · no price shown
Per month. Mailwarm shows its three prices as billed annually under a monthly and yearly switch labelled -13%, and its page text gives no monthly figure; read on mailwarm.com/pricing on 21 October 2026. Warmerly's email plans cover mailboxes and are billed monthly here; 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.
Both go custom at the top
Warmerly's Max is for more than 100 mailboxes. Mailwarm's Tailored lists no mailbox limit and no price.
Ten mailboxes, side by side
To warm 10 mailboxes on Warmerly you need Growth at $49 a month, which covers up to 25. On Mailwarm you need Scale at $479 a month, which covers exactly 10. The two are not like for like, because Scale includes calls with an expert, but the mailbox arithmetic is plain.
Growing one mailbox at a time
A team that adds a mailbox a month will cross Mailwarm's tiers at the second and fourth mailbox, with price steps from $69 to $159 to $479. On Warmerly the step is at the sixth mailbox, from Starter's 5 to Growth's 25.
Slots are only mailboxes you connect
On Warmerly a free sandbox mailbox and any OneMail mailbox sit outside the plan count. If you buy hosted mailboxes, your plan's slots are left for the ones you already own.
Check what the daily figure means
Mailwarm lists up to 50, 200 and 500 warm-up emails a day. If those are per plan, a Scale customer with 10 mailboxes gets 50 a day each at most. Ask before you buy, because its page does not say.
Agencies and many client mailboxes
An agency with 40 client mailboxes fits Warmerly's Agency plan at $179 for 100. On Mailwarm that count is beyond Scale's 10, so it means Tailored, which has no published price.
Who it suits
Pick the one that fits.
Warmerly
Warmerly is the better fit if
- You run 5 to 100 mailboxes and want the price published
- You want to add mailboxes on a plan with a known price
- You need more than a handful of mailboxes and want the price published
- You use hosted mailboxes and want them kept out of the plan count
- You want a free plan with 1 mailbox to try the product
Mailwarm
Mailwarm is the better fit if
- You expect to go beyond 100 mailboxes and want a dedicated expert managing it end to end
- You warm only one or two mailboxes and want an expert call on each plan
- You want users and calls bundled into the same price as the mailboxes
Questions
How many mailboxes does Mailwarm Starter cover?
One. Growth covers 3 and Scale covers 10. Warmerly Starter covers 5.
Can Mailwarm warm more than 10 mailboxes?
Its Tailored plan lists unlimited mailboxes. The price is not published.
How many mailboxes does Warmerly Growth cover?
Twenty-five, for $49 a month. Starter covers 5 for $19 and Agency covers 100 for $179.
Do hosted mailboxes count towards the Warmerly plan?
No. OneMail mailboxes and the free sandbox mailbox do not use a plan mailbox slot.
Sources
Mailwarm 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.