Are you already paying for lemlist and wondering if the warmup that comes with it is enough? Or are you looking at Lemwarm on its own and want to know if it's any good?
Both questions get answered here.
Lemwarm is lemlist's own warmup tool. lemlist plans include the Essential tier, so most users run it without comparing it to anything else. Free with your plan is not the same as good at keeping you in the inbox.
I cover four things here. What Lemwarm does, what it costs on both paths, where users say it slips, and when a different warmup tool fits you better.
I based it on user feedback from G2, Capterra, Reddit, and cold email communities, plus lemlist's current pricing and docs.
Here's the full breakdown.
Lemwarm is an email warmup and deliverability tool from lempire, the company behind lemlist. It warms your mailbox by exchanging emails across a network of more than 20,000 real domains in over 100 countries.
You connect an inbox in one click. From there Lemwarm does three jobs.
Lemwarm sends automated emails from your mailbox to other inboxes in its network. Those emails get opened and replied to like normal conversation.
Gmail and Outlook read that activity as human behavior. Over a few weeks they start trusting your domain enough to put your emails in the primary inbox.
Lemwarm tracks a deliverability score for every connected mailbox. You get alerts when something starts hurting it.
That covers spam risks in your content, sending patterns that look irregular, and setup problems across SPF, DKIM, DMARC, and MX records.
Lemwarm shows you what's hurting your placement.
Sending too fast, spammy templates, broken DNS records. You see the problem instead of guessing why replies dried up.
Warmup handles one part of deliverability. It doesn't fix a bad list, weak copy, or a domain you already burned.
Lemwarm is getting popular because it uses real email accounts instead of bots or fake accounts.
It also easily integrates with Lemlist, a well-known cold email tool.
This natural approach is what sets it apart from other tools like Mailreach or Warmup Inbox.
Here's exactly how we set up and ran Lemwarm over 45 days, so you can see what it looks like in practice.
The team and email volume
We run outbound with a team of three people. We send 500 to 1,000 cold emails every week.
The email setup
All of our outbound email goes through Google Workspace. Even with the basics done right, too many emails were landing in spam.
The plan we picked
We went with the Smart Plan at $49 per mailbox per month. That tier adds personalized warm-up emails, warm-up on real campaign templates, custom deliverability alerts, and an industry-matched warm-up network.
What we wanted Lemwarm to fix
We wanted better inbox placement, fewer bounces, and more replies. We also wanted a way to measure whether warm-up actually moved deliverability or just felt like it did.
The setup process
The whole setup took about 15 minutes. We didn't touch it again after that.
After using Lemwarm daily for 45 days, here's my clear breakdown of the features I found useful—and those that need work.
One-click inbox connection: Lemwarm connects to Gmail and Outlook in one click, and Zoho, FastMail, and Proton work too. No DNS work to get warmup running.
Large warmup network: More than 20,000 healthy domains across 100+ countries. Pool size matters, because a small network means the same inboxes talking to each other over and over.
Automatic warmup with human emails: Lemwarm sends and replies on your behalf. Both plans include human warmup emails rather than machine-generated filler.
Technical setup check: It flags problems with SPF, DKIM, DMARC, and MX records. That catches the issue most senders don't know they have.
Deliverability score with alerts and tips: You get a score that moves with your sending behavior and your content. Alerts fire when spam risk climbs, and daily tips tell you what's dragging the score down.
Personalized warmup on the Smart plan: Warmup emails get personalized instead of templated. Lemwarm can also warm using your real campaign templates and match the network to your industry.
Included with lemlist: Every lemlist plan comes with lemwarm. If lemlist already sends your campaigns, you pay nothing extra for warmup.
Warmup only: No sending, no sequences, no reply inbox. You still pay for lemlist, Instantly, or Smartlead on top.
Per-mailbox pricing: Essential runs $29 per mailbox per month and Smart runs $49. Warm ten mailboxes on Smart and that's $490 a month before you send a single campaign.
Aggressive plan split: Personalized warmup, real-template warmup, custom alerts, and the industry-matched network all need the Smart plan. Essential gives you generic warmup content.
Standalone buyers pay twice: Lemwarm is lemlist's deliverability layer sold separately. Buy it alone and you're paying warmup prices without the sending tool that makes it worth having.
Overall, Lemwarm gets the basics right, but improving customization and pricing could make it even stronger for beginners and small teams.
After testing Lemwarm daily for 45 days, the results were better than I expected.
Here's a quick snapshot of the actual improvements I noticed:
I paused Lemwarm briefly in Week 6. Inbox placement quickly dropped by around 10%. Once resumed, it bounced back to 80%.
This confirmed that consistent warm-up activity was essential.
Here's a clear visual summary:
The results show Lemwarm clearly delivered the improvements it promised.
Overall, Lemwarm delivered solid results, especially in reducing spam placement and improving inbox reach.
But in parallel, I also ran a test using Warmforge on another domain, and a few things stood out:
That said, I also tested Warmforge on a different domain around the same time.
While both tools worked well, I noticed Warmforge gave me a bit more visibility into engagement types and domain reputation over time.
It felt more “hands-on” in a good way.
If you're comparing tools, I'd say Lemwarm is great if you want something more automated and straightforward.
But if you’re into deeper reporting and more control, Warmforge might be worth a look, too.
Both did the job, but depending on your workflow and how much detail you want, one might fit better than the other.
Lemwarm currently offers two pricing options. Let me break down each clearly:
Lemwarm charges per email account, not per user. So the price you see is the price for one mailbox.
Who it's for: Solo senders and anyone starting cold email with one or two mailboxes. It covers the basics at the lowest price.
Who it's for: Sales teams, founders, and agencies running client accounts. The industry-matched network and template warm-up are the reasons to pay the extra $20.
You have to contact sales for a quote on this one.
Billing options
Monthly is the default price shown above. Quarterly billing saves 10%, and yearly saves 20%.
What it actually costs you
Run five mailboxes on Smart and you pay $245 a month. Run ten and you pay $490. That covers warm-up alone, before you pay for a sending tool.
Every lemlist plan includes lemwarm, so lemlist customers pay nothing extra for it.
My take
Pick Essential if you warm one or two mailboxes and want the basics done right. Pick Smart if you run several mailboxes and want warm-up that matches your real campaigns.
If you send from more than a handful of mailboxes, do the per-mailbox math before you commit. That's where the bill grows fast.
Here is the clear breakdown of Lemwarm alternatives:
Warmforge is an emerging warm-up and outreach tool built for users who want more flexibility, visibility, and outreach features in one place.
Best For: Startups and sales teams that need both warm-up and cold email sending in one dashboard with more granular control.
Key Features:
Read the full review by Nancy O.
What Stood Out:
Compared to Lemwarm, Warmforge gave more transparency, customizability, and slightly faster deliverability improvements.
If you want to do more than just warm up, like running full campaigns, it’s a great all-in-one option.
Mailreach is a professional-grade warm-up tool focused on email deliverability performance and reporting accuracy.
It’s popular among agencies and teams managing large volumes.
Best For: Larger teams or agencies who want in-depth analytics, deliverability reporting, and fine-tuned warm-up workflows.
Key Features:
Read the full User review
Why It’s Great:
Mailreach offers enterprise-level insights, making it ideal for those managing lots of inboxes or needing compliance-level reporting.
Warmup Inbox is a lightweight and budget-friendly option that covers the basics well. It’s good for solopreneurs, small teams, or beginners.
Best For: Freelancers or small teams looking for a simple and affordable warm-up solution.
Key Features:
Read the full review by Davidpau D.
Why It’s Popular:
It skips the fluff and focuses on getting your inbox warmed up without requiring much setup or oversight.
Perfect if you just want something that works quietly in the background.
After trying all four, I’d say each tool has its strengths—Lemwarm worked well, especially if you're already using Lemlist.
Mailreach impressed me with its analytics, and Warmup Inbox is great if you just want something quick and simple.
But from my experience, Warmforge gave me the most control and visibility.
I liked having warm-up and outreach in one place, and it felt easier to track overall deliverability health across domains.
If that’s something you care about, it might be worth a closer look.
From my experience using Lemwarm, here’s my advice:
If you need something cheaper and simpler for a very basic warm-up, try Warmup Inbox.
For bigger teams wanting advanced analytics, Mailreach could be better.
But if you're focused on reliable warm-up and straightforward performance, Lemwarm is a solid choice—I found it worth using.
After 45 days with Lemwarm, the tool did what it says it does.
Inbox placement improved. Replies climbed. Bounce rates came down.
It ran quietly in the background without daily attention. Setup was simple, and the dashboard made it easy to see whether the score was moving.
Who it suits
Lemwarm fits teams sending cold email at real volume, especially if lemlist already runs your campaigns. In that case warm-up costs you nothing extra.
Who should skip it
If you send a few cold emails a week, the price is hard to justify. And if you warm mailboxes across several sending tools, the per-mailbox cost adds up fast.
Our recommendation
Start on the Essential Plan at $29 per mailbox per month if you're testing cold outreach. Check your inbox placement weekly. If the score climbs steadily after two to three weeks, keep going or move up to Smart.
Our rating: 4 out of 5 ⭐⭐⭐⭐☆
Lemwarm is reliable, easy to use, and it does improve deliverability. The one point we're holding back is cost. At $29 to $49 per mailbox, the bill grows quickly for small teams and anyone running more than a few mailboxes.
Worth comparing before you buy
Warmforge costs $9 per mailbox slot per month standalone, and it's included with every Salesforge plan at no extra cost. If you want warm-up and sending in one place, that math is worth checking.
Warmup Inbox is simpler and cheaper if you want warm-up with no extra features. MailReach suits larger teams that want deeper deliverability reporting.
Try Warmforge free, one free slot on signup, no credit card needed.
Lemwarm warms up your email account by sending and receiving emails through a trusted network.
This builds sender reputation and improves deliverability.
Yes. It connects securely using SMTP or Google API, following proper email standards.
It can’t guarantee it, but it significantly reduces the risk by improving your reputation with email providers.
At least 3–4 weeks, especially if your domain is new or inactive.
No. Lemwarm is a separate warm-up tool built by Lemlist. You can use it with or without Lemlist.
Yes. Tools like Warmforge (which combines warm-up + sending), Warmup Inbox (great for beginners), and Mailreach (for teams that want deeper analytics) are solid
alternatives depending on your goals.
