Warmup Inbox vs MailReach Pricing and Cost per Mailbox Compared by Volume

Warmup Inbox is cheaper than MailReach on list price at every volume from 1 to 50 inboxes, as long as 75 warmup emails a day per inbox is enough for you. Warmup Inbox Basic costs $15 per inbox a month on annual billing and falls to $7.50 at 50 inboxes. MailReach costs $20 per mailbox annual for 1 to 5 mailboxes and $12.80 at its lowest band, but it includes spam tests and allows up to 100 warmup emails a day. If you need more than 75 a day, MailReach is cheaper than Warmup Inbox Pro by a wide margin.

Both pricing pages were read at source on October 24, 2026. Neither page prints a full price list: both use a slider, so we read the price tables the pages load in their code (Warmup Inbox ships a 50-step table per plan, MailReach a four-band rule). Every number below comes from those tables or is plain arithmetic on them, labeled as such. For the full Warmup Inbox breakdown, plan by plan, see Warmup Inbox pricing.

How the two tools price warmup

Both charge per inbox, and both lower the rate as you add inboxes. The difference is the shape of the discount.

Warmup Inbox has three plans. One inbox costs $15 a month on Basic, $49 on Pro and $79 on Max with annual billing, or $19, $59 and $99 monthly. From the second inbox the per-inbox rate drops a little with every inbox you add, and the lower rate applies to all of them. On Basic annual it is $14.40 at two inboxes, $12.50 at ten, $9 at twenty-five and $7.50 at fifty. Above 50 inboxes the price is quoted after a call.

MailReach has one warmup plan, which it calls All-In-One, priced in four bands. On monthly billing a mailbox costs $25 for 1 to 5 mailboxes, $19.50 for 6 to 20, $18 for 21 to 50 and $16 for 51 to 100. Annual billing takes 20 percent off: $20, $15.60, $14.40 and $12.80. Above 100 mailboxes it quotes. Every plan includes 20 spam test credits, and more can be added on a separate slider, starting at $30 a month for 50 credits on monthly billing.

Is Warmup Inbox cheaper than MailReach?

On the cheapest plan of each, yes, and the gap widens with volume. At 10 inboxes on annual billing Warmup Inbox Basic costs $125 a month and MailReach $156, a difference of $31 a month or $372 a year. At 25 inboxes it is $225 against $360. At 50 it is $375 against $720, so MailReach costs almost twice as much. Year one at 10 inboxes, both on annual billing, comes to $1,500 for Warmup Inbox Basic and $1,872 for MailReach.

That comparison is fair only if the two plans do the same work. They do not quite. Warmup Inbox Basic sends up to 75 warmup messages a day per inbox. The MailReach plan card lists up to 100 a day and includes the 20 spam tests. If 75 a day covers your sending, Basic is the cheaper buy. If you want the higher daily ceiling, the Warmup Inbox plan that clears 100 a day is Pro at 250, and Pro costs $400 a month at 10 inboxes against $156 at MailReach. On that like-for-like basis MailReach is cheaper by $244 a month.

Why six MailReach mailboxes cost less than five

Band pricing has a side effect that is easy to miss on the slider. When you cross into a new band, the lower rate applies to every mailbox, so the total can fall. At MailReach on monthly billing, five mailboxes cost $125 and six cost $117. Twenty cost $390 and twenty-one cost $378. Fifty cost $900 and fifty-one cost $816. On annual billing the same edges apply: $100 for five against $93.60 for six.

The practical rule: if you are at 5, 20 or 50 mailboxes on MailReach, the next mailbox is free money, it lowers the bill and gives you a spare inbox to rotate in. We checked all six Warmup Inbox price rows from 1 to 50 inboxes and the total never drops there, because its discount moves in small steps rather than bands. Warmup Inbox never punishes you for being one inbox short of a threshold, and MailReach sometimes rewards you for buying one more.

Which is better, Warmup Inbox or MailReach, for a cold email team?

On price and fit, the choice usually comes down to three questions.

• How many warmup emails a day do you need? Up to 75 per inbox: Warmup Inbox Basic is the cheapest option of the two. Between 75 and 100: MailReach. Above 100: Warmup Inbox Pro or Max, which go to 250 and 1,000 a day.
• Do you need spam testing? MailReach bundles 20 spam test credits into every plan and sells more. Warmup Inbox Basic lists spam and category monitoring and an email reputation check, but its plan cards do not include a bundle of spam test credits.
• Are you an agency? Both quote above a threshold (Warmup Inbox above 50 inboxes, MailReach above 100). Warmup Inbox lists multi-client workspaces, consolidated billing and white-label reports for agencies. MailReach invites agencies to talk about flexible pricing but prints no agency terms.

Two smaller differences can decide it. Warmup Inbox offers a 7-day trial of the full plan with no card, plus a freemium tier that sends 15 warmup emails a week. MailReach currently runs an autumn offer of 20 percent off the first 30 days on your first mailbox. Neither offer changes the long-run cost much.

What you pay for with either tool, and what you still need

Warmup tools build sender reputation by exchanging messages with a network of other inboxes. Warmup Inbox says its network has more than 30,000 real inboxes; MailReach says its network is made of Google Workspace and Office 365 inboxes. Both claims are the vendors' own. Neither tool writes your cold emails, finds your prospects or replaces the mailboxes themselves.

So the warmup line sits on top of the rest of the stack. A typical setup is three or four mailboxes per sending domain, each mailbox about $7 to $8.40 a month on Google Workspace or Microsoft 365, domains at $10 to $15 a year, and list verification at roughly $20 per 5,000 contacts. Before you scale sending, it also pays to run your domains and sending IPs through an email blacklist check, because no amount of warmup fixes a domain that is already listed. Our cold email infrastructure page puts those unit costs together per mailbox and per month.

When you may not need either one

If you send cold email from a platform that already warms every connected inbox, a standalone warmup tool is often a second bill for the same job. At 10 inboxes, Warmup Inbox Basic alone is $125 to $160 a month and MailReach $156 to $195, before a single prospect has been contacted. Instantly's Growth plan includes unlimited warmup for $47 a month. ColdOutreach includes warmup on every plan and on every sending domain you add, from $24 a month on annual billing, and it researches each prospect and drafts the sequence too, which is the part of cold email that actually moves reply rates.

A standalone tool still earns its cost when your sender has no warmup of its own, when you warm inboxes that are not used for cold email, or when an agency wants one warmup bill across clients on different senders. If none of those apply, compare the warmup line against ColdOutreach pricing before renewing it.

Bottom line

For a team that needs up to 75 warmup emails a day per inbox, Warmup Inbox Basic is the cheaper of the two at every volume, from $15 per inbox down to $7.50. For a team that wants up to 100 a day plus spam tests in the same bill, MailReach is the better value, and if you are sitting at 5, 20 or 50 mailboxes, buy one more. For anything above 100 a day, Warmup Inbox Pro or Max is the only one of the two that goes there. And if your sending tool already warms your inboxes, check whether you need the extra bill at all.