Lemwarm vs Mailreach: Email Warmup Tool Comparison

Lemwarm vs Mailreach: Email Warmup Tool Comparison

Both of these tools bill you by the mailbox, and that single fact decides more than any feature on either page. A team warming three inboxes and a team warming thirty are not comparing the same two products, because the line on the invoice grows in a straight line on both sides. What differs is the slope, what comes bundled with each mailbox, and whether you are already paying for one of them without knowing it.

The short answer

Pick Mailreach if warmup is a standalone line in your stack and you want spam testing in the same product. Its pricing page publishes $19.50 per mailbox per month on a slider running from 1 to 100 or more mailboxes, and every warmed mailbox carries at least 20 spam test credits because the warmer and the spam tester are sold as one thing.

Pick Lemwarm if you are on lemlist, or expect to be. Lemwarm's pricing page lists the Essential plan at $29 per email account per month and the Smart plan at $49, and lemlist includes lemwarm with every plan, so a team already paying for lemlist is choosing between using something it owns and buying a second tool.

If you are on neither and warmup is the whole purchase, the arithmetic below favours Mailreach at every mailbox count. If you are on lemlist, the honest answer is usually to use what you have and revisit only if the deliverability reporting stops telling you what you need.

What each one is actually charging for

Both bill per mailbox, so both scale linearly. The difference is what a mailbox buys.

Lemwarm pricing

Lemwarm's pricing page offers three billing periods rather than the usual two: monthly, quarterly at 10% off and yearly at 20% off. The PER EMAIL label sits directly beside the price on the page, which is the part worth reading twice.

Source: Lemwarm pricing

Mailreach pricing

Mailreach has no named tiers. Its pricing page renders a slider: you choose the number of mailboxes to warm, and the page shows $19.50 per mailbox per month, with an annual toggle marked Save 20%. Spam test credits are a second slider alongside it, running from 20 to 10,000 or more, and at least 20 credits are included with the warmer at every position. The warmup ceiling is up to 100 emails per day per mailbox.

A note on where our own numbers came from: our pricing dataset carried a named "1 mailbox" tier at $25 a month for Mailreach. A byte search of the live pricing page finds no $25 token anywhere on it. The figures above are the page's.

Source: Mailreach pricing

$29Lemwarm Essential

per email account per month, lemwarm.com/pricing

$19.50Mailreach

per mailbox per month, mailreach.co/pricing

$49Lemwarm Smart

per email account per month, adds personalised warm-up

The arithmetic, at three sizes

Here is an invented but arithmetically honest worked example. The mailbox counts are made up to show the shape of the two curves. No part of it comes from a customer, and the only real numbers in it are the two published rates.

Take a team warming 3, 10 and 25 mailboxes, on monthly billing, using Lemwarm's Essential plan:

The gap is proportional because both curves are straight lines, so there is no crossover point to hunt for and no volume at which the ranking flips. Mailreach is cheaper per mailbox at every count, and the annual toggles move both numbers in the same direction: Lemwarm Essential falls to $24 an account, Mailreach publishes Save 20% on its annual view.

That table is the whole cost story, which is why the decision usually gets made on the two things it does not show: whether you already own Lemwarm, and whether you want spam testing in the same tool.

Where the two feature lists actually differ

Every claim below is about what a vendor lists on its own page. A capability missing from one list is a fact about the list, not proof the product cannot do it, and several of these overlap in substance while being named differently.

Lemwarm lists

• A warm-up network of 20k+ healthy domains
• Human warm-up emails rather than generated filler
• A technical setup check covering SPF, DKIM and DMARC
• Deliverability reports and a deliverability score
• Personalised warm-up using your real email templates on the Smart plan
• A warm-up network tailored to your industry on the Smart plan
• Included free with every lemlist plan

Mailreach lists

• A smart AI warming algorithm with dozens of parameters
• Automated spam testing with at least 20 credits included
• MailReach Co-Pilot, an AI deliverability assistant
• Blacklist, SPF, DKIM and DMARC monitoring
• A reputation tracking dashboard per inbox
• Multiple ESP warm up covering Google and Outlook
• Up to 100 emails per day per mailbox

Read the overlap honestly. Both list DNS-record checking, both list a per-inbox health or reputation view, and both warm through a network of real accounts. The two genuine divergences are that Mailreach folds spam testing into the same subscription, and that Lemwarm can warm using your actual campaign templates on the Smart plan rather than generic conversation.

Who should pick which

Lemwarm or Mailreach

• ✓Yes: You already pay for lemlist, so lemwarm is included at no extra cost. Pick Lemwarm.
• ✓Yes: Warmup is a standalone purchase and the mailbox count is above five. Pick Mailreach on the per-mailbox rate.
• ✓Yes: You want spam placement testing in the same product as the warmer. Pick Mailreach.
• ~Depends: You want the warmup traffic to resemble your real campaign copy. Pick Lemwarm Smart.
• ✓Yes: You need warmup across Mailgun, SendGrid or Amazon SES rather than Gmail and Outlook. Pick Mailreach.
• ~Depends: Neither answer is obvious and the mailbox count is under three. The monthly difference is under thirty dollars, so pick either and spend the decision time on list quality.

The last line is not filler. Below about five mailboxes the two products cost roughly the same amount of money and neither will be the reason a campaign works or does not.

Switching between them

Warmup is the easiest category in outbound to migrate, and the easiest to migrate badly.

The mechanical part is simple. Both tools connect mailboxes over OAuth for Google and Microsoft or over SMTP for everything else, so moving means disconnecting in one and reconnecting in the other. There is no data to export, because warmup holds no list of yours.

The part people get wrong is the gap. Do not disconnect the old tool before the new one has ramped. Warmup builds a reputation signal through sustained daily volume, and a mailbox that goes from a steady daily pattern to zero and back again looks worse to a provider than one that was never warmed. Run both for a week, confirm the new tool is sending, then stop the old one.

Two vendor-specific notes. Mailreach ramps warmup volume gradually toward its stated ceiling of 100 emails a day per mailbox, so a mailbox moved across is not at full volume on day one. And if you are moving away from Lemwarm because of cost, check first whether it is included with a lemlist subscription you are already paying for, because in that case the saving is zero.

Where warmup sits in a cold outbound stack

Warmup is infrastructure, not strategy. It raises the probability that a message you send lands in an inbox. It has no view on whether the message deserved to.

In the way we run outbound, that puts warmup underneath everything else and makes it uninteresting on purpose. Campaigns send one message per prospect, with no bumps and no thread replies, so there is no follow-up sequence to rescue a first touch that went to spam. That raises the stakes on placement: the single send is the whole campaign, and warmup is the cheapest insurance available on it. It is also the reason the mailbox count in the arithmetic above tends to be larger than people expect, because volume comes from more mailboxes each sending modestly rather than from one mailbox sending hard.

Neither tool measures the thing you actually care about, which is whether real prospects saw your message. A deliverability score is a proxy. Reply rate from real sends is the measurement, and both tools are equally silent about it.

For the wider picture of what a warmup tool is competing with in your budget, the cold email pricing guide sets out the other lines, and the warmup tool roundup for cold email teams covers the field beyond these two.

The decision, in one paragraph

If you pay for lemlist, use Lemwarm, because you have already bought it. If you do not, Mailreach is cheaper per mailbox at every count published on either page and bundles the spam testing you would otherwise buy separately, which makes it the default for a standalone warmup line. Lemwarm earns the premium in exactly one situation: you want the warmup traffic to look like your real campaigns, which is what the Smart plan sells, and you are warming few enough mailboxes that the per-account rate does not compound into something you would notice.

Related Reading

• Best Lemwarm Alternatives in 2026
• Best Mailreach Alternatives in 2026
• Lemwarm vs Warmbox: Email Warmup Tool Comparison
• Mailreach vs Warmbox: Email Warmup Tool Comparison
• Best Email Warmup Tools for Cold Email Teams

If you would rather not run the infrastructure at all, RevenueFlow books qualified meetings on a pay-per-meeting basis and publishes client results.

Pricing and features are taken from the vendors' own pages. Verify current terms with the vendor before relying on them.