Last updated: September 2026.
Quick answer: Email warmup pricing splits into two models. Per-inbox tools like MailReach and Warmy charge roughly $19.50 to $49 per mailbox every month. Flat-rate tools like Mailivery charge one price for unlimited mailboxes, starting at $29 per month, so your cost stops climbing as you add inboxes. Compare what is bundled too: Mailivery includes inbox placement testing, email verification, blacklist monitoring, a spam word checker and free DNS checks on every plan, where most warmup tools sell those separately or not at all.
Most email warmup tools would rather you not do the math. The moment you connect more than a handful of mailboxes, per-inbox pricing quietly turns a $29 tool into a four-figure invoice. That one decision, per-inbox versus flat, moves your annual cost more than any feature on a comparison page.
If you are still new to the practice, our email warmup guide explains how warmup builds sender reputation. This post is about the money. We will break down what email warmup costs in 2026, how each pricing model works, and which one wins at your specific mailbox count.
We warm more than 100,000 active mailboxes across our own network, so we see how these bills land in the real world. We also priced every tool below from its own published pages in September 2026. Where a vendor hides its pricing, we say so.
Almost every warmup tool uses one of two pricing models, and the difference matters more than the logos.
The first is per-inbox pricing. You pay a set fee for each mailbox you connect. MailReach, Warmy, Warmup Inbox, and Mailwarm all work this way. One inbox feels cheap. Ten inboxes cost ten times as much.
The second is flat or volume-based pricing. You pay one price tied to total daily warmup volume, then connect as many mailboxes as you want under that limit. Mailivery and TrulyInbox use this model. Your fiftieth mailbox costs the same as your first.
A third group bundles warmup into a larger outreach platform. Instantly includes warmup with its sending plans, and lemwarm ships free with paid lemlist seats. Warmup is not sold on its own there, so the cost only makes sense if you also want the sending tool.
Here is what each major tool charges, taken from its own pricing page in September 2026. Read the pricing model column first, because it decides how fast the bill grows.
Two things stand out. Warmy does not show a price at all. Its pricing page lists B2B, B2C, and Custom tiers behind a Book a demo button, so the widely repeated $49 per inbox figure comes from third parties, not from Warmy. We flag that rather than treat a rumor as fact.
The other standouts are the flat-rate tools. Mailivery and TrulyInbox both let you connect unlimited mailboxes, which is where the math gets interesting once you scale past one or two inboxes.
Entry price is a trap. What you actually pay depends on how many mailboxes you warm. To compare fairly, we assume each mailbox warms at about 30 emails per day, a common ratio for cold senders, then pick the cheapest plan on each tool that covers the total.
At one mailbox, MailReach is about ten dollars cheaper, and that is worth saying plainly. Flat pricing is not about winning the single-inbox race.
The gap opens fast. At ten mailboxes, the per-inbox tool already costs two and a half times as much. At fifty mailboxes, MailReach runs $975 a month while Mailivery holds at $199. That is the same $199 whether you warm 50 inboxes or 5.
Per-inbox pricing scales with your problem, not your value. Every domain you add to protect your outreach adds another line to the invoice, even though the warmup network does the same work.
We watched this play out with Automailer, an outreach platform in our network. They came to us with 100 mailboxes stuck at 92 percent spam placement. On a per-inbox tool at even $15 an inbox, warming all 100 would have cost around $1,500 a month. Mailivery covered all 100 for $199, and their spam rate dropped to 4.1 percent within three weeks.
That is the whole argument for flat pricing in one story. The per-inbox model made the fix expensive at exactly the moment they needed to move fast across many mailboxes.
Agencies feel this hardest. When you warm ten or fifty client domains, per-inbox fees eat directly into the retainer. Flat pricing keeps your deliverability cost roughly fixed while your client count grows.
Search for the cheapest email warmup tool and you will get a different winner depending on how many inboxes you run. That is why a flat answer is misleading.
For a single mailbox, a cheap per-inbox tool or a free tier can be the lowest sticker price. TrulyInbox even offers a free plan for one account at 10 warmup emails a day. For a solo sender testing the waters, that is genuinely the cheapest start.
Past a few mailboxes, the definition flips. The cheapest email warmup tool becomes the one whose price does not multiply, which means a flat-rate plan. So the honest answer to the cheapest option is a question back: how many inboxes are you warming, and how fast will that number grow?
One more cost hides in the fine print. Many per-inbox tools charge extra for inbox placement testing, often $40 to $100 a month on top of warmup. If a tool bundles placement testing, blacklist monitoring, and verification, the real cost comparison shifts again.
Warmup is one line on a deliverability budget. The rest of the line items are the ones that tell you whether warmup is working: are you on a blacklist, are your DNS records right, is your copy tripping spam filters, are the addresses you send to even real, and where does your mail actually land.
Most warmup tools price warmup and stop there. MailReach bundles 20 spam test credits. Warmup Inbox, Mailwarm and TrulyInbox do not include placement testing, verification or blacklist monitoring at all. Bought separately, inbox placement testing alone runs $40 to $100 a month, and a verification tool and a monitoring service sit on top of that.
Mailivery includes all of it on every plan, including the $29 Starter. Nothing here is a higher-tier unlock.
Two things follow from that. First, the entry tier is a real deliverability setup, not a warmup-only teaser, so you are not stacking three subscriptions to answer one question. Second, the credits scale with the plan, so an agency on Business gets 100 placement tests and 50 monitored domains and IPs rather than a bigger warmup number alone. If a month runs heavy, additional inbox placement and verification credits can be bought a la carte instead of forcing an upgrade.
The free deliverability tools sit outside the subscription entirely. Spam checker, blacklist checker, email verifier, subject line analyzer and template grader are open to anyone, no account required, which is a fair way to sanity-check a domain before you pay anybody for warmup.
So when you compare two warmup prices, compare the two bills. A $19.50 per-inbox plan plus a placement testing subscription plus a verification tool is not competing with $29. It is competing with $29 and losing on both sides of the equation once you pass a couple of mailboxes.
Mailivery uses flat pricing on purpose. You pick a plan based on total daily warmup volume, then connect unlimited mailboxes under that limit. You never pay per inbox.
The three plans are:
- Starter at $29 a month for 200 warmup emails a day
- Professional at $79 a month for 800 a day
- Business at $199 a month for 2,500 a day.
Annual billing takes 25 percent off each, which is $21.75, $59.25 and $149.25 a month.
Every feature comes on every plan, so inbox placement testing, blacklist monitoring across 70+ lists, email verification, the spam word checker, free DNS record checks and full API access are never locked behind a higher tier.
What changes between tiers is volume: warmup emails a day, and how many placement tests, verification credits and blacklist monitors come with the plan. If you need more of any of those in a given month, you buy credits rather than jump a tier. You can see the full breakdown on our email warmup product page, and if you want a broader field, our best email warmup tools roundup compares eleven options on more than price.
One angle our B2B-only competitors miss is consumer sending. Because our network includes real Gmail and Yahoo accounts, not just cold-email inboxes warming each other, Mailivery works for newsletters and transactional mail too, not only outbound sales. Warmup that only interacts with other cold senders is a smaller, less realistic signal.
We pulled every price in this post from each vendor's own pricing page and help documentation in September 2026, not from third-party review sites, which often confuse monthly and annual rates. Mailivery figures come from our live pricing and product pages.
For the cost-at-scale table, we assumed each mailbox warms at about 30 emails per day, then selected the lowest-cost plan on each tool that covered the resulting daily volume. Mailivery and TrulyInbox prices reflect that shared-volume logic. MailReach reflects its published list rate of $19.50 per inbox per month, which drops a further 20 percent on annual billing.
We left Warmy out of the numeric table because Warmy does not publish fixed prices. We also treated Instantly and lemwarm as bundled tools, since neither sells warmup as a standalone product. Your exact bill will vary with billing term, promotions, and how aggressively you warm each inbox.
Email warmup costs anywhere from free to several hundred dollars a month, depending on the pricing model and your mailbox count. Per-inbox tools like MailReach run $19.50 per mailbox monthly. Flat-rate tools like Mailivery start at $29 a month for unlimited mailboxes, so cost depends on total warmup volume rather than inbox count.
The cheapest email warmup tool depends on how many inboxes you warm. For a single mailbox, a free tier or a low per-inbox plan wins on sticker price. Once you run several mailboxes, a flat-rate tool like Mailivery becomes cheapest, because the price does not multiply with each inbox you add.
Flat pricing is usually better once you warm more than two or three mailboxes. Per-inbox pricing looks cheap for one inbox but multiplies with every mailbox you add. Flat pricing keeps your cost tied to daily warmup volume, so scaling from 5 to 50 mailboxes does not blow up the bill.
Warmy does not publish fixed prices on its website. Its pricing page shows B2B, B2C, and Custom tiers behind a Book a demo button. Figures like $49 per inbox that circulate online come from third-party sources, so the only way to get a firm Warmy quote is to contact their sales team.
Not always. Many warmup tools charge separately for inbox placement testing, often $40 to $100 a month. Mailivery includes inbox placement testing on every plan, starting with 10 credits on the $29 Starter and rising to 100 on Business, alongside blacklist monitoring and email verification. If you run out mid-month, you can buy more credits instead of upgrading.
Every Mailivery plan includes inbox placement testing, email verification, blacklist monitoring across 70+ lists, a spam word checker, free DNS record checks for SPF, DKIM and DMARC, and full REST API access. Credit allotments scale with the plan and reset monthly, and you can buy additional inbox placement or verification credits without moving up a tier.
A common guideline is to match warmup volume to your cold sending, roughly one to two warmup emails for every cold email per mailbox each day. Many senders land around 30 warmup emails per mailbox daily. That ratio is what we used to estimate total volume in the cost table above.
Yes, on flat-rate tools. Mailivery and TrulyInbox both let you connect unlimited mailboxes on paid plans, sharing one daily warmup volume across all of them. Per-inbox tools like MailReach and Warmy charge for each mailbox, so unlimited connections are not part of that model.
A free tier can work for one mailbox at low volume, like TrulyInbox's free plan at 10 warmup emails a day. It is fine for testing. For real outreach across multiple inboxes, free tiers cap volume too low to protect sender reputation, so most senders move to a paid flat-rate or per-inbox plan.
Ready to stop paying per inbox? Start a 7-day free trial of Mailivery and warm unlimited mailboxes on one flat plan.
The easiest way to get responses to your cold emails.
