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Side-by-side comparisonBy the Warmy deliverability team Updated 11 min read
lemwarm facts checked against its own website and help center, November 2026
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lemwarm is the warmup tool from lemlist. It costs $29 or $49 a month per email address, and it comes with every lemlist plan. If all you need is a warmed-up mailbox, it does that job well.
Warmy starts at $49 a month per mailbox and does more than warmup. The same platform runs inbox placement tests by provider, monitors DMARC, verifies your list, and engages with your real campaigns through a 500K+ US seed list. In short, lemwarm helps you warm up a mailbox. Warmy helps you warm up, test, monitor, and fix what’s hurting your deliverability.
KEY TAKEAWAYS
Warmy: Per mailbox, by daily warmup volume
lemwarm: Per email address; included in every lemlist plan
Warmy: $49/month (Starter, 100 warmup emails a day)
lemwarm: $29/month (Essential), $24 billed yearly
Warmy: Placement tests by provider, DMARC monitoring, email verification, seed list
lemwarm: Warmup Score and DNS check; placement tests live in lemlist’s Deliverability Hub
Warmy: 7 days, no credit card
lemwarm: Not listed on its pricing page
Warmy: 24/7, with an onboarding manager and dedicated CSM on every plan
lemwarm: Priority support on the 10+ user Custom plan
Warmup is where deliverability starts, not where it ends. Most email deliverability tools stop once the mailbox looks healthy. The questions that cost you pipeline come later: are your campaigns landing, and if not, why? Here’s where Warmy makes a practical difference.
lemwarm grades your warmup with a Warmup Score. Warmy runs placement tests that show where an email lands at each provider: inbox, Promotions, or spam.
What this means for you: if replies drop, you can check inbox placement using your campaign email and sending mailbox instead of guessing based on a score.
Warmy’s warmup network has over 1 million mailboxes from major providers worldwide. On top of that, its seed list adds more than 500,000 American seed mailboxes that open your actual campaign emails and move them out of spam. The list rotates automatically every month.
What this means for you: new mailboxes build history in the background, and the campaigns you actually send get positive signals too.
Warmy connects Google Workspace, Microsoft 365, and SMTP mailboxes, regardless of which tool sends your email: lemlist, another cold email platform, or an ESP like Klaviyo or Mailchimp.
What this means for you: you can switch sending tools or use several without rebuilding your deliverability setup each time.
Every Warmy plan, including Starter, comes with an onboarding manager, a dedicated CSM, and 24/7 human support. You also get Warmy’s Deliverability Academy to build your own skills. With lemwarm, priority support is available on the Custom plan for teams of more than 10 users.
What this means for you: someone who knows deliverability is there when a campaign goes sideways, even if it’s Saturday.
lemwarm focuses on warmup and works best inside lemlist. Warmy adds testing, monitoring, and a seed list to warmup, and it isn’t tied to one sending tool. Here’s how that looks side by side.
| Criterion | Warmy | lemwarm |
|---|---|---|
| Positioning | Email deliverability platform: warmup, testing, monitoring, and seed list | Email warmup tool from lemlist, sold on its own or included in lemlist plans |
| Warmup network | 1M+ mailboxes from major providers worldwide | 20,000+ healthy domains |
| Seed listKey difference | 500K+ US seed mailboxes; open emails, move them out of spam; rotates monthly | Not offered |
| Inbox placement testingKey difference | Results by provider: inbox, Promotions, spam; scheduled auto-tests | Not listed for standalone lemwarm; lemlist’s Deliverability Hub runs placement tests (100 credits per test) |
| Warmup quality score | Domain and IP reputation tracking with alerts | Warmup Score: DNS setup, warmup spam rate, blacklists, domain age |
| Daily warmup volume | 100 to 5,000 warmup emails a day, by plan | Set by you; lemlist recommends 30–40 a day per mailbox |
| Personalization | Your own templates; warmup topics from Premium; 30+ languages from Business | Smart plan: personalized warmup emails, your real templates, an industry-tailored network |
| Authentication and monitoring | DMARC monitoring with the exact record to change, blacklist alerts, Google Postmaster data | DNS check (MX, SPF, DMARC) and SpamAssassin score |
| Email verificationKey difference | Built in | Not listed in lemwarm plans |
| AI | Adeline AI co-pilot and Templates AI optimizer | Smart plan: personalized warmup content |
| API and automationKey difference | Documented API on every plan; n8n, Zapier, and Make workflows | No lemwarm API listed on its pricing page; lemlist offers a developer API |
| Pricing model | Per mailbox, from $49/month | Per email address: $29 or $49/month; included in lemlist plans |
| Free trial | 7 days, no credit card | Not listed on its pricing page |
| Support | 24/7; onboarding manager and dedicated CSM on every plan | Priority support on the Custom plan (10+ users) |
| Setup | Connect via OAuth or SMTP/IMAP in minutes | Connect a mailbox in the lemwarm app, then set a daily limit and ramp-up |
lemwarm details come from its pricing page and the lemlist Help Center, checked November 2026 (see sources). The two networks are counted differently: Warmy counts mailboxes, lemwarm counts domains. lemwarm and lemlist are trademarks of their respective owner.
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A warmup score and a placement test answer different questions. The score tells you how healthy your warmup looks. A placement test tells you where a real email lands. You need both, but only one of them shows you the inbox.
lemwarm’s Warmup Score is built from four factors: DNS setup (40 points), warmup spam rate (30), blacklists (20), and domain age (10). lemlist is upfront about its limits: the score “does not predict whether your campaign emails will land in the inbox.” That’s why searches for a lemwarm deliverability test usually lead to lemlist’s Deliverability Hub, where placement tests cost 100 credits each and lemlist suggests running one or two a month.
With Warmy, placement tests are part of the platform. Send a test from your regular sending mailbox using the same email you send to recipients, and check the results for each provider. Schedule repeat tests to keep your baseline current, so you can spot a drop before your next big send.
Want a quick read first? Run Warmy’s free email deliverability test. It checks placement, blacklists, and SPF, DKIM, and DMARC in one go.
Warmy offers five plans that cover multiple mailboxes. lemwarm offers two plans priced per email address, plus volume pricing for 10+ users.
| Pricing detail | Warmy | lemwarm |
|---|---|---|
| Starting price | $49 / month | $29 / email address / month |
| Billing | Monthly | Monthly, quarterly (−10%), or yearly (−20%) |
| Plans |
|
|
| Placement tests | Included in every plan | Seed placement tests not listed |
| Also included | Google Postmaster integration, API access, custom warmup settings, agency dashboard, Deliverability Academy, private community. 7-day free trial, no credit card. | Included free with every lemlist plan |
Prices in USD from each vendor’s public pricing page, checked November 2026. Prices can change; confirm on the vendor’s site before buying.
Both tools charge per mailbox, so the fair comparison is what one mailbox gets you. lemwarm pricing starts lower: $29 a month for warmup on Essential, or nothing extra if you already pay for lemlist. Warmy starts at $49 a month for one mailbox, with 100 warmup emails a day, an onboarding manager, a dedicated CSM, and 24/7 support. Higher Warmy plans add warmup volume, credits, warmup topics, and language selection.
So if you only need a warmed-up mailbox, lemwarm is the cheaper option. If you also need to see where campaigns land and fix what’s wrong, compare the full setup, not just the warmup line.
Here’s what you’ll work with after you sign up.
Watch each mailbox ramp up on the network, with volume, inbox rate, and reputation in one view.
See who is sending emails from your domain, which messages fail authentication, and the exact record to fix.
Trusted by 35,000+ happy businesses: marketers, entrepreneurs, and affiliates.
“Warmy has been a game changer for us. The platform pays for itself many times over.”
“If you do cold email, Warmy will increase your efficiency, improve your deliverability, and cut your costs.”
Thomas Tzouridis“I've purchased many marketing tools before. Often, once you buy, you're on your own. With Warmy, they care about you.”
lemwarm is a solid choice when warmup is all you need, especially if you already use lemlist. Warmy fits better once you need to know where your campaigns land and why.
To see where campaigns land, not just a warmup score
Placement tests by provider, plus DMARC monitoring and email verification on the same platform.
Engagement on the emails you actually send
A 500K+ US seed list that opens your campaign emails and rescues them from spam.
Freedom to use any sending tool
lemlist, another cold email platform, or an ESP like Klaviyo or Mailchimp.
Help at any hour
24/7 support, with an onboarding manager and a dedicated CSM on every plan.
Warmup in your recipients’ language
30+ warmup languages, from the Business plan.
Warmup that’s already in your lemlist plan
lemwarm comes with every lemlist plan.
The lowest price for warmup only
lemwarm Essential costs $29 per address, or $24 billed yearly.
Not sure which problem you have? Run a free email deliverability test or start a 7-day free trial.
lemwarm is an email warmup tool made by lemlist. It sends and receives warmup emails across a network of 20,000+ healthy domains and grades progress with a Warmup Score. On its own, it costs $29 or $49 a month per email address. As lemlist warmup, it’s included in every lemlist plan, which is why many people search for it as lemlist lemwarm.
Warmy is an AI-driven email deliverability platform. It warms up mailboxes on a network of over 1 million mailboxes, engages with real campaigns through a 500K+ US seed list, and adds inbox placement tests, DMARC monitoring, email verification, and API access. Warmy works with any sending tool and starts at $49 per mailbox per month.
Both tools build sender history the same basic way: they send a gradually growing number of emails from your mailbox and create positive engagement with them. The differences are in how much control you get and what happens to your real campaigns.
For lemwarm email warmup, you connect a mailbox in the lemwarm app and set two numbers: a daily warmup limit and a ramp-up increment. lemlist recommends about 30 to 40 warmup emails a day per mailbox and says a mailbox is usually fully warmed up within three to five weeks.
The Smart plan goes further. You answer a short questionnaire, and lemwarm places you in an industry cluster and writes personalized warmup emails, including emails based on your real templates. That’s a genuine strength, especially for lemlist users whose campaigns already live in the same tool.
Warmy is an email warmup tool that works through your existing provider and uses a network of over a million mailboxes from major providers worldwide. It sends during working hours in the recipient’s time zone, ramps up gradually, and slows down at night and on weekends, the way a real person would.
Warmy opens messages, replies to them, marks them as important, and rescues them from spam. Daily volume runs from 100 to 5,000 warmup emails depending on the plan. You can use your own templates, choose warmup topics from the Premium plan, and pick from 30+ warmup languages from the Business plan. Auto-archive keeps warmup messages out of your inbox.
The email seed list is where Warmy works on your real campaigns. More than 500,000 American seed mailboxes engage with your emails by opening them and moving them out of spam, so your deliverability keeps improving. The list rotates automatically every month.
lemwarm doesn’t offer a seed list. Its warmup traffic, even on the Smart plan, is separate from the campaigns you send to prospects.
Start with authentication. SPF, DKIM, and DMARC are the core protocols in Google’s sender requirements, and lemwarm treats them as the biggest part of its Warmup Score. Its DNS check flags MX, SPF, and DMARC problems so you know what to fix.
Warmy goes from checking to monitoring. DMARC monitoring shows who is sending emails from your domain, which messages fail, and the exact record to change. Domain and IP reputation is tracked continuously, with alerts when a blacklist or reputation signal drops, and Google Postmaster data sits next to your warmup results. Need a record right now? The free SPF generator and DMARC generator build one in minutes.
Keep the template and provider mix consistent between tests. If most of your recipients use Microsoft 365, watch those results before raising volume, even when the overall score looks healthy.
If you use lemlist, lemwarm is already part of your plan, so the fair question is: why add anything? Usually, because of a moment like this one.
Your campaign is running. Reply rates have dropped over the past two weeks, but your Warmup Score still looks fine. Here’s how to work out what’s going on.
Remember what the score measures. It grades your warmup and DNS setup. It doesn’t tell you where your campaign emails land.
Test the real email from the real sender. Run a placement test with the content you’re actually sending, from the mailbox that’s actually sending it.
Read the results by provider. If your emails land in spam only for Microsoft 365 recipients, look at that provider first. If every provider shows spam or Promotions, look at reputation, authentication, and content together.
Fix the cause, then retest. Check DMARC and blacklists, clean the template, ease off volume, and rebuild engagement on the campaign itself.
Warmy covers each of those steps on one platform: placement tests by provider, DMARC monitoring, the Template Checker, and a seed list that engages with the campaign you’re trying to rescue. You keep lemlist for sending. Warmy connects to the same mailboxes.
lemwarm is built to sit inside lemlist. Warmy is built to sit next to whatever you already use.
| Feature | Warmy | lemwarm |
|---|---|---|
| API | WarmyDocumented API on every plan | lemwarmNo API listed on lemwarm’s pricing page; lemlist offers a developer API |
| Sending tools | WarmyAny tool that sends from Google Workspace, Microsoft 365, or SMTP mailboxes | lemwarmNative inside lemlist; standalone plans connect your mailbox directly |
| Email platforms | WarmyWorks with Klaviyo, Mailchimp, HubSpot, SendGrid, ActiveCampaign, and any SMTP setup | lemwarmFocused on outreach mailboxes |
| Automation | Warmyn8n, Zapier, and Make workflows | lemwarmNot listed on lemwarm’s pricing page |
If you’re looking at lemwarm alternatives because you need testing, monitoring, or support around your warmup, switching is straightforward:
Check where your campaign emails land. Run placement tests from your sending mailbox and compare results by provider.
Add engagement to your real campaigns. Use Warmy’s 500K+ US seed list alongside your regular sends.
Keep lemlist for sending. Warmy connects to the same mailboxes. If you add Warmy’s warmup, pause lemwarm on those mailboxes first.
Take a baseline. Run a placement test before you change anything, so you can compare later.
Connect your mailboxes. Add them to Warmy via OAuth or SMTP/IMAP. It takes a few minutes per mailbox.
Stop lemwarm on those mailboxes. Don’t run two warmup tools on the same mailbox at the same time.
Watch placement as you scale. Track results by provider and monitor your DMARC reports as volume grows.
Still comparing options? See our roundup of the best lemwarm alternative tools, or read how switching to Warmy works.
Every lemwarm detail on this page comes from lemwarm’s pricing page and the lemlist Help Center, checked November 2026. Where something isn’t published, we say so instead of guessing. Warmy details come from Warmy’s pricing and product pages. We make Warmy, so we’ve tried to keep this comparison fair and to say where lemwarm is the better fit. Spot something out of date? Tell us and we’ll correct it.
If you’re reading lemwarm reviews, compare them with the official documentation below. lemwarm’s plans and its Warmup Score have changed over time.
Update history
October 29, 2026: Comparison rewritten. lemwarm plans, pricing, Warmup Score, and lemlist Deliverability Hub checked on lemwarm’s and lemlist’s own pages.
Book a free demo, or get a free 7-day trial (no credit card required) and see how Warmy can improve your email deliverability.
Want to compare more of the best email warm up tools? See how Warmy stacks up against other email deliverability solutions.
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