Lemwarm is the email warmup tool that comes with Lemlist, which is one of the most popular cold email platforms. It helps you with email warm-up, so you can have a smooth start for cold emailing.
However, I kept seeing the same complaints about Lemwarm on G2, Reddit, and cold email communities. They push people to look for Lemwarm alternatives:
So I tested 11 warmup tools. I wanted something more affordable per inbox, easy to run across multiple mailboxes, and at least as good at the actual warm-up process.
These are the 7 Lemwarm alternatives that made my list.
If you are in a hurry, here are the three picks that stood out in my testing:
Before the detailed reviews, here is how all seven tools compare on trials, pricing, placement testing, and integrations:
All prices reflect annual billing. Check each vendor's live pricing page before you commit, because prices change often.
Now let's look at each Lemwarm alternative in detail, starting with my top pick.
Best for: GTM teams, and agencies running cold email who want premium warmup, testing, and health monitoring in one tool.
Warmforge is an email deliverability tool from the Forge stack. It combines premium unlimited email warmup, inbox placement testing, and mailbox health monitoring in one dashboard.
You connect a mailbox, click once, and the AI handles the rest. It writes unique warmup emails and sends them through a premium pool of aged Google Workspace, Microsoft 365, and SMTP mailboxes.
The warmup also runs in multiple languages, so the activity looks natural to inbox providers worldwide. Over time, that builds a stronger sender reputation and better inbox placement.
Why Warmforge is My Top Lemwarm Alternative
Three things make Warmforge my top pick: the price, the placement tests, and the built-in monitoring.
Lemwarm charges $29 per inbox per month, while Warmforge charges $9 per slot on annual billing. You pay $90 to warm 10 mailboxes instead of $290.
Its Inbox Placement Tests impressed me the most, because Lemwarm gives you a score while Warmforge shows the exact folder your emails land in.
Each slot also includes 1 free placement test every month.
Finally, Heat Score™ shows when a mailbox is ready to scale, and Health Checks protect your domain health with alerts before a small issue burns a domain.
Key Features
Limitations of Warmforge
Warmforge Pricing (Billed Annually)
You can start with one free warmup slot, and you won't need a credit card.
Best for: Sales and marketing teams that send both B2B and B2C campaigns and want a deep deliverability toolkit with volume-based pricing.
Warmy.io is an AI-powered email deliverability platform. It prepares your domains and IPs for outreach campaigns with automated warmup, deliverability insights, and placement testing.
Its AI engine, Adeline, personalizes the warmup process. A Google Postmaster integration brings reputation data from Google straight into your dashboard.
Warmy also runs separate warmup networks for B2B and B2C senders.
If you sell to businesses, your mailboxes warm through business inboxes on Google Workspace and Microsoft 365. If you sell to consumers, they warm through personal inboxes on Gmail, Yahoo, and Outlook.
Warmy claims a 25-second setup process, and the platform supports all major email providers.
Why Warmy.io Is a Top Lemwarm Alternative
Lemwarm stops at warmup and a deliverability score.
Warmy goes further and adds deliverability testing, placement insights, and Google Postmaster data on top of the warmup.
The B2B and B2C split also matters because your warmup activity matches the providers your prospects actually use. Lemwarm offers nothing similar.
In my testing, the warmup engine ran reliably, and sender reputation built steadily across multiple accounts.
Key Features
Limitations of Warmy.io
Warmy.io Pricing (Billed Annually)
Best for: B2B founders, salespeople, and lead gen agencies warming 5 to 40 inboxes who care about warmup quality.
MailReach is an email warmup and spam test tool that focuses on one job: inbox placement. When you connect a mailbox, MailReach warms it through a network of active business inboxes. These inboxes open your emails, reply to them, and rescue any that land in spam.
The Smart AI warming algorithm adjusts the process for each mailbox and sends up to 100 warmup emails per day. A reputation dashboard tracks progress, and the built-in Co-Pilot AI assistant answers deliverability questions inside the app.
MailReach also runs a spam testing tool. You send a test, and it shows your spam score plus what to fix before an actual campaign goes out. Every plan includes 20 spam test credits.
Why MailReach Is a Top Lemwarm Alternative
Lemwarm does not share what its warmup network is made of. MailReach openly runs its warmup through active business inboxes. That difference matters because inbox providers and spam filters can spot weak engagement from throwaway accounts.
You also get spam tests that Lemwarm does not offer. Testing a template before a big send protects you from avoidable spam placements.
The warmup volume is higher too. MailReach sends up to 100 warmup emails per day per mailbox, against Lemwarm's 40 on the Essential plan.
Key Features
Limitations of MailReach
MailReach Pricing (Billed Annually)
Best for: Solo founders, freelancers, and small teams warming their first few mailboxes at the lowest possible price.
Warmup Inbox is a simple warmup tool with a network of 30,000+ inboxes. Those inboxes open your emails, reply to them, and rescue them from spam on the same providers your prospects use.
Setting up Warmup Inbox takes about a minute. You connect Gmail, Outlook, Google Workspace, Microsoft 365, or any SMTP inbox. The network then starts exchanging natural-looking email with yours.
The dashboard tracks your warmup performance live across inbox, spam, and bounce rates. DNS, SPF, DKIM, and blacklist checks run in the background on every plan.
Why Warmup Inbox is a Top Lemwarm Alternative
At $15 per inbox per month on the Basic plan, Warmup Inbox costs about half of standalone Lemwarm. If you are warming your first two mailboxes, that price difference alone decides it.
You also get more warmup volume for that lower price. The Basic plan sends 75 warmup messages per day, against Lemwarm's 40 on the Essential plan.
The setup is also faster than Lemwarm's, and it works without any sending tool subscription.
Key Features
Limitations of Warmup Inbox
Warmup Inbox Pricing (Billed Annually)
Best for: Lead gen agencies and growing sales teams managing many client mailboxes who do not want per-inbox warmup pricing.
Mailivery is an email warmup tool that never charges per inbox. Every plan supports unlimited inboxes, so you can connect unlimited email accounts and pay for shared daily warmup volume instead.
The warmup runs on AI-generated conversations with a peer-to-peer network of business inboxes, which inbox providers reward with better deliverability. Mailivery moves your emails out of spam and replies to them. It keeps all the activity in dedicated folders, so it never clutters your inbox.
Every plan also bundles blacklist monitoring across 70+ lists, email verification credits, placement test credits, and a spam words checker. Teams get roles, seats, and one dashboard for every mailbox.
Why Mailivery is a Top Lemwarm Alternative
Lemwarm charges per inbox, so your costs climb with every mailbox you add. Mailivery flips that model. Its Starter plan costs $21.75 per month, covers unlimited mailboxes, and includes 200 shared warmup emails per day.
If you warm 10 mailboxes on standalone Lemwarm, you pay $290 per month. On Mailivery, those same 10 mailboxes share one plan. Agencies managing multiple inboxes for clients keep warmup costs flat. The cost per inbox drops with every account they add.
Every plan also bundles extras that Lemwarm sells nowhere: blacklist monitoring, placement test credits, and email verification.
Key Features
Limitations of Mailivery
Mailivery Pricing (Billed Annually)
Best for: Enterprise-level agencies, deliverability consultants, and any team recovering a damaged sender reputation with the budget for a premium email warmup tool.
InboxAlly takes a different approach from warmup-only tools. Its seed inboxes receive your actual email campaigns. They then open them, reply, mark them important, and move them out of spam.
Those engagement signals teach inbox providers that your emails belong in the primary inbox.
The platform scores your sender reputation with a machine-learning model called IA Score. It also rates each domain live and tracks placement as it happens.
Every plan includes the same capabilities: adaptive Autowarmup, a full REST API, native HubSpot and Klaviyo integrations, placement testing, blacklist monitoring, and a dedicated customer success manager.
Why InboxAlly is a Top Lemwarm Alternative
Lemwarm warms a mailbox, while InboxAlly repairs your reputation on live sending, which is a much harder job. It reverses bad classifications by moving messages out of spam and promotions and back into the primary inbox.
If a domain is already damaged, this is the tool I would pick first. Documented recovery cases show placement improving over several weeks, though results depend on how damaged the setup is.
Key Features
Limitations of InboxAlly
InboxAlly Pricing (Billed Annually)
Best for: Mid-size and enterprise teams without an in-house deliverability specialist who want managed, expert help beyond automated warmup.
Folderly is a complete deliverability platform with a managed service behind it. Three products work together: Inbox Insights tests where your emails land, Folderly fixes sender reputation with daily upkeep, and Pulse monitors mailbox health around the clock.
The platform goes beyond basic warmup and detects why emails go to spam.
It finds technical and content triggers in Gmail and Outlook, and it checks your DNS records. Instant alerts reach you the second an email lands in spam.
Folderly's team works on your deliverability alongside the software. The company holds SOC 2 and ISO 27001 certifications.
Why Folderly is a Top Lemwarm Alternative
Lemwarm gives you a deliverability score, but Folderly diagnoses your deliverability issues and gives you a fix list. It covers the whole deliverability job rather than warmup alone.
You also get placement testing across Gmail, Outlook, and Yahoo through Inbox Insights. Lemwarm does not offer that at any price. That makes diagnosing inbox placement issues far easier.
If your team has no deliverability specialist, Folderly gives you one on demand through its managed service.
Key Features
Limitations of Folderly
Folderly Pricing (Billed Annually)
At this point, the choice should be clearer.
All the tools listed above can warm up your email accounts. The main difference is how they price, scale, and justify upgrades. That matters most if you manage outreach with inbox rotation across multiple domains.
Here is a simple way to decide:
Work out how many inboxes you plan to warm and whether placement visibility matters to you. After that, the right Lemwarm alternative becomes easy to pick.
If you want to start today, create a free Warmforge slot and run your first placement test. You won't need a credit card.
Here are quick answers to the questions people ask most about Lemwarm and its alternatives.
Warmforge is the best Lemwarm alternative for most cold email senders. It costs $9 per mailbox slot per month against Lemwarm's $29 per inbox standalone. It also adds Inbox Placement Tests, Heat Score™ tracking, and Health Checks that Lemwarm doesn't offer.
Yes, qualifying Lemlist subscriptions include Lemwarm's Essential plan at no extra cost. Standalone use needs a paid plan.
Standalone Lemwarm costs $29 per month per inbox on the Essential plan, or $24 per month billed annually. The Smart plan is $49 per month per inbox, or $40 annually.
Yes, Lemwarm works as a standalone warmup tool with its own plans. At $29 per inbox per month, though, it prices above most dedicated warmup tools. That is why many standalone users switch.
Warmforge includes 1 free warmup slot on signup with a free monthly placement test, and you won't need a credit card. Warmy, Warmup Inbox, and InboxAlly offer free trials without a credit card. Mailivery's trial requires a card.
Plan for 2 to 4 weeks before a new mailbox is ready for full campaign volume. Heat Score™ style reputation tracking takes the guessing out of when to start scaling. If you can't wait, pre-warmed mailboxes from providers like Primeforge skip the wait entirely.
Yes, Warmforge warms Google Workspace and Microsoft 365 mailboxes from any mailbox provider, plus IMAP/SMTP mailboxes. Forge stack mailboxes from Mailforge and Infraforge connect natively, but nothing requires them.
