Warmy Alternatives: 10 Warmup Tools Compared by Use Case

The best Warmy alternatives fall into two groups: sequencers with built-in warmup (Instantly, Smartlead, PlusVibe, lemlist with lemwarm) and dedicated warmup tools (MailReach, Warmup Inbox, Warmbox, Mailivery, Mailwarm, Folderly). If you only need basic warmup for cold email, a sequencer that includes it is the cheapest switch. If you need B2C warmup, ESP warmup or seed list engagement, few tools match Warmy, and our Warmy review explains why.

Some tool links here are affiliate links (disclosure). Nerdy Joe is an affiliate of Warmy, MailReach, Instantly and Smartlead, and a PlusVibe Certified Silver Partner. If you want to compare against the original first, see Warmy's plans and free trial.

We did not test these tools hands-on. Prices and features come from each vendor's own site as of November 2026, listed in the sources at the end.

Why people look for a Warmy alternative

These are plain facts from Warmy's own pages, not complaints we collected.

• The entry price. Warmy starts at $49 a month, about double MailReach's $25 for one mailbox.
• Unclear mailbox math. One Warmy comparison page says plan volume is shared across mailboxes; another says $49 per mailbox. Your bill for 10 mailboxes could be $189 or $490 a month (our arithmetic).
• Thin pricing page. The pricing page shows only "from $49 a month"; the five-plan table lives on Warmy's comparison pages.
• Strict billing terms. Warmy's terms say fees are non-refundable, monthly billing is post-paid, and you must cancel at least five business days before renewal, through support.
• Add-ons on request. Warm-up with clicks, seed list sizes, credit top-ups and Reputation Repair have no published prices.
• It is not a sending tool. Warmy warms and tests; you still need a sequencer.

If none of these bother you, read the section on when to stay with Warmy below. Our Warmy pricing breakdown has the full plan math under both readings.

Warmy alternatives at a glance

Monthly list prices as of November 2026, from each vendor's pricing page. The 10 mailbox column is our arithmetic.

This is list-price arithmetic only. Daily volumes, networks and what counts as a test differ by vendor.

Sequencers with built-in warmup

These tools send your campaigns and warm your mailboxes in the same subscription. None charges a per-mailbox warmup fee.

1. Instantly

Best for: teams running many mailboxes that want sending and warmup on one bill.

Instantly lists unlimited email accounts and unlimited warmup on all Outreach plans. Growth is $47 a month ($37.60 on annual billing) and Light Speed is $358 ($286.30 annual), as of November 2026. Instantly claims a warmup pool of more than 1 million accounts.

Watch for: inbox placement testing is a separate subscription, and our October 2026 research found it at $47 or $97 a month, so check the current price. Our Instantly review covers the rest.

2. Smartlead

Best for: agencies and lead gen teams with many client mailboxes.

Smartlead plans are Base $39, Pro $94, Unlimited Smart $174 and Unlimited Prime $379 a month, as of November 2026. Smartlead says all plans include unlimited email accounts at no extra cost, with warmup included, and the warmup pool tier depends on your plan.

Watch for: Smartlead does not publish its network size, and SmartDelivery placement testing is an add-on at $49, $174 or $599 a month. See our Smartlead review.

3. PlusVibe

Best for: budget-minded senders who also want cheap placement tests.

PlusVibe lists Personal at $37 a month ($30.80 yearly) with Basic warmup, Business at $77 ($64.20 yearly) with Advanced warmup, and Agency from $497. PlusVibe claims a warmup pool of 350k+ accounts, and its Email Placement Test add-on costs $19 for 300 credits, $39 for 1,000 or $89 for 5,000 a month.

Watch for: the warmup level differs by plan, so check what Basic and Advanced mean for your volume. Nerdy Joe is a PlusVibe Certified Silver Partner, and our PlusVibe review goes deeper.

4. lemwarm (lemlist)

Best for: teams already sending with lemlist.

lemwarm is included at no extra cost in every lemlist plan. Bought alone, Essential is $29 per email address a month ($24 yearly) and Smart is $49 ($40 yearly), which adds warmup of your real templates and an industry-tailored network. lemwarm claims a network of 20k+ healthy domains and says it has been IMAP-based since August 2022.

Watch for: standalone, 10 mailboxes cost $290 a month at list price. No free trial is mentioned on lemwarm's pricing page.

What you give up with built-in warmup

Sequencer warmup is built for cold email from Google Workspace, Microsoft 365 and SMTP mailboxes. Warmy also warms ESP and marketing platform sending (Mailchimp, Klaviyo, SendGrid, Amazon SES), offers a seed list that engages with your real campaign emails, and bundles DMARC monitoring and email verification, per its own pages. If you need those, a sequencer alone will not replace it; the Warmy review covers each feature, or you can start Warmy's 7-day free trial.

Dedicated warmup tools

These work like Warmy: you connect mailboxes and the tool warms them, whatever you use to send.

5. MailReach

Best for: B2B cold emailers who want warmup plus seed-list placement tests in one tool that works with any sender.

MailReach is priced per mailbox. Its own blog lists $25 a month for 1 to 5 mailboxes, $19.50 for 6 to 20 and $18 for 21 to 50, with 20% off on annual billing, as of November 2026. Every warmup plan includes at least 20 spam test credits, and the free spam test allows 3 tests per 24 hours with no card.

Watch for: no free trial of the warmer is advertised, MailReach says it works best for B2B, and it does not offer template, industry or language warmup (it argues these do not help reputation). At 20 mailboxes MailReach's list price ($390) is above Warmy Expert ($279) under the shared reading. Our MailReach review has the detail.

6. Warmup Inbox

Best for: the lowest per-inbox price among the dedicated tools we checked.

Warmup Inbox is priced per inbox: Basic $15 a month (75 warmup emails a day), Pro $49 (250 a day) and Max $79 (1,000 a day). There is a Freemium plan at $0 with 15 emails a week, a 7-day trial with no card, and custom quotes above 50 inboxes. The vendor claims more than 30K real inboxes in its network.

Watch for: the page says annual billing saves 20%, but the annual totals shown equal 12 times the monthly price. Confirm before you prepay.

7. Warmbox

Best for: solo senders and small teams with 1 to 6 inboxes.

Warmbox sells plans by inbox count: Solo (1 inbox, 50 warmup emails a day), Start-up (3 inboxes, 250 a day) and Growth (6 inboxes, 500 a day), with Team as a custom plan. All plans list spam score monitoring, a DNS and blacklist checker, and support for Gmail, Microsoft 365, Yahoo, Zoho, SendGrid, Mailgun, Amazon SES and any SMTP.

Watch for: the page shows two unlabeled price sets under its Yearly and Monthly toggle ($15 or $19 for Solo, $69 or $79 for Start-up, $139 or $159 for Growth). The lower set is most likely yearly, but we could not confirm it, and no free trial is mentioned.

8. Mailivery

Best for: many mailboxes that each need only light warmup.

Mailivery prices by shared daily volume, much like Warmy's shared reading. Starter is $29 a month ($21.75 yearly) for 200 warmup emails a day across unlimited mailboxes, with a 100 a day per mailbox cap and 10 inbox placement credits. Professional is $79 (800 a day), Business is $199 (2,500 a day), and there is a 7-day free trial.

Watch for: on Starter, 10 mailboxes average 20 warmup emails a day each. The yearly cards show slightly different volumes than the monthly ones, and network size is not published.

9. Mailwarm

Best for: teams that want deliverability expert calls with their warmup.

Mailwarm lists Starter at $79 a month ($69 yearly) for 1 mailbox and up to 50 warmup emails a day, Growth at $189 ($159 yearly) for 3 mailboxes and 200 a day, and Scale at $549 ($479 yearly) for 10 mailboxes and 500 a day. Plans include deliverability expert calls, and Mailwarm says no IMAP access is required.

Watch for: Mailwarm says "We don't offer a free trial", and at list price it is the most expensive per mailbox here apart from Folderly.

10. Folderly

Best for: larger teams that want a sales-led deliverability product.

Folderly lists $96 per mailbox a month on yearly billing, bought through a demo request. Its Inbox Insights placement tests are separate: a free tier with 2 tests a month, or $79 a month for 100 tests.

Watch for: no monthly price is shown and volume pricing is hidden. Ten mailboxes come to $960 a month at the listed rate.

A note on Google and warmup tools

This applies to every tool on this page, Warmy included.

Google's sender guidelines recommend increasing volume slowly to engaged recipients and do not mention warmup tools. Gmail's program policies prohibit automating Gmail in ways that mislead or deceive users. In 2023, GMass said Google required it to shut down its API-based warmup.

Vendors describe their own positions. Warmy says its warmup emails stay inside its own network and that it is not affected by the Gmail API restrictions GMass faced, though its help center says OAuth connections use the Gmail API or Microsoft Graph API.

MailReach says Google has not banned warmup, and lemwarm says it has been IMAP-based since August 2022.

Google has not published a position on warmup networks specifically, so treat automated warmup as a practice Google neither endorses nor explicitly names. Warmup engagement comes from network inboxes, not real prospects, and Google's spam-rate thresholds apply to real recipient complaints, which warmup does not change.

How to choose

Checklist before you switch:

• [ ] Count every mailbox you warm, including each address on a shared domain.
• [ ] Price your count on two or three tools, not just the entry plan.
• [ ] Check whether placement testing is included or an add-on.
• [ ] Note Warmy's renewal date and its five business day cancellation notice.
• [ ] Keep warmup running on the old tool until the new one has ramped up.

For the infrastructure side (domains, mailboxes per domain, sending limits), see our guide to cold email infrastructure. For a broader roundup, see the best email warmup tools.

When to stay with Warmy

Warmy's mix is unusual, and switching can lose things that matter. Stay if several of these apply:

• You send B2C or mixed email. Warmy sells separate B2B and B2C sender plans and gives B2C guidance, such as adding clicks and using a dedicated IP.
• You warm ESP or transactional sending. Warmy lists warmup for Mailchimp, SendGrid, Mailgun, Amazon SES, Brevo and many more, not only mailboxes.
• You want custom warmup content. Warmy offers topics, 30+ languages and your own templates up to 100% of warmup traffic on higher plans.
• You use the seed list. Warmy's seed list engages with your real campaign emails, which is useful where SMTP warmup is not possible. It is still non-recipient engagement.
• You run many mailboxes and volume is shared. Under Warmy's shared reading, Platinum covers 50 mailboxes at $429, or $8.58 each (our arithmetic).
• You want one bill. Warmy's comparison pages bundle placement tests, verification, DMARC monitoring and Postmaster data.

If that sounds like you, check Warmy's current plans and confirm the mailbox slots before you renew. For a head-to-head with its closest dedicated rival, read Warmy vs MailReach.

Rather not build the list yourself?

Warmup is one piece of outbound. The list, the copy and the daily sending take most of the time.

Nerdy Joe is owned by Agency Growth Partners (AGP), and AGP builds verified lists and runs outbound for agencies. If you would rather hand that off, book a call with David.

Bottom line on Warmy alternatives

For plain cold email warmup, Instantly, Smartlead and PlusVibe include it in the sending plan, and that beats any per-mailbox fee. For a dedicated B2B warmer with placement tests, MailReach is the closest swap, while Warmup Inbox and Mailivery are the budget picks.

Warmy remains the stronger fit for B2C, ESP warmup, seed list engagement and custom warmup content. Read the full Warmy review before you decide, and if you stay, start from Warmy's plan page.

Disclosure: My relationship with Instantly is that of an independent party. I do not hold any position, nor do I have the power to form binding agreements or act on behalf of Instantly. My earnings are derived from referral compensations provided by Instantly. The views I share are solely mine and should not be seen as official statements, promises, or representations of Instantly, or any related entities or personnel.

Sources

• Warmy pricing
• Warmy vs MailReach (Warmy comparison page, updated November 2026)
• Warmy vs lemwarm (Warmy comparison page, updated November 2026)
• Warmy terms of service
• Warmy help: how to cancel your subscription
• Warmy email warm-up product page
• Warmy seed list
• Warmy integrations
• Warmy help: warming up for B2B vs B2C
• Warmy help: template warm-up
• Warmy help: email sending process
• Warmy blog: GMass alternative (Warmy on Gmail API restrictions)
• Instantly pricing
• Smartlead pricing
• PlusVibe pricing
• lemwarm pricing
• lemwarm: is email warm-up dead
• MailReach pricing
• MailReach blog: Warmup Inbox pricing (MailReach tier table)
• MailReach email warmup (no template or language warmup)
• MailReach email spam test
• MailReach blog: email warmup, in-house vs third-party services
• Warmup Inbox pricing
• Warmbox pricing
• Mailivery pricing
• Mailwarm pricing
• Folderly pricing
• Google: email sender guidelines
• Gmail program policies
• GMass: warmup shutting down