Best email warm-up tools: 15 compared on price per mailbox
Standalone warm-up services and sending tools that include warm-up, side by side: what 3 and 50 mailboxes cost each month, which ones have a free plan, and who should pick which.
Emelia is our product, and it is part of this comparison. Every price comes from the vendor’s own pricing page, read on October 18, 2026, in US dollars on monthly billing unless stated; Emelia’s prices exclude VAT. We say where other tools do better.
Email warmup tools compared: cost for 3 and 50 mailboxes
The two price columns follow Emelia’s plans: 3 mailboxes is Start, 50 is Grow. For tools billed by daily warm-up volume, we use the vendor’s own sizing when it publishes one, never a price per mailbox of our own.
Swipe sideways to see every column →
Email warmup tools compared: cost for 3 and 50 mailboxes
Tool
3 mailboxes, per month
50 mailboxes, per month
Free plan or trial
Sends your campaigns
How it is billed
Type
Our product
$37 (Start)
$97 (Grow)
No free plan; 7-day trial, no card
Cold email, LinkedIn, email finder
Per plan: 3, 50 or unlimited mailboxes
Included in a sending tool
$47 (Growth)
$47 (Growth)
14-day trial, no card
Cold email, no LinkedIn
Per sending plan, unlimited accounts
Included in a sending tool
$69 (Email plan)
$69 (Email plan)
14-day trial, without lemwarm
Cold email; LinkedIn on Multichannel
Per sending plan, unlimited senders
Included in a sending tool
$39 (Base)
$39 (Base)
14-day trial, no card
Cold email, no LinkedIn
Per sending plan, unlimited mailboxes
Included in a sending tool
$41 (Starter, up to 5 mailboxes warming at once)
$189 (Scale, up to 50 mailboxes warming at once)
7-day trial, no card
Cold email, no LinkedIn
Per sending plan, warm-up through TrulyInbox
Included in a sending tool
$75 (3 × $25)
$900 (50 × $18)
No trial found; free spam test
Warm-up and spam tests
Per mailbox, $25 down to $16
Standalone warm-up
Warmup Inbox
$57 (3 × $19)
$475 (50 × $9.50)
7-day trial, no card
Cold email sequences, no LinkedIn
Per inbox, $19 down to $9.50
Warm-up with sequences
$87 (3 × $29)
$1,450 at list price, volume pricing on request
Free only inside paid lemlist plans
Warm-up only; lemlist sends
Per email address, $29 (Essential)
Standalone warm-up
$288 (3 × $96), yearly
$2,800 (50 × $56), yearly
No trial found; free placement tests
Monitoring and placement reports
Per mailbox, billed annually
Deliverability suite
$29 (Starter, sized for 3)
$199 (Scale, sized for 50)
Free plan: 1 account, 10 emails a day
Warm-up only
Daily volume shared by unlimited accounts
Standalone warm-up
From $49, by daily volume
Not published per mailbox
7-day trial, no card
Warm-up and placement tests
Warm-up emails per day
Standalone warm-up
From $149 (1 sender profile)
$1,190 for 10 profiles, then on quote
10-day trial, no card
Works with your sending tool
Seed emails per day and sender profiles
Standalone warm-up
$79 (Start-up)
On quote (Team plan)
Trial mentioned on one page, length not given
Warm-up only
Bundles of 1, 3 or 6 inboxes
Standalone warm-up
$189 (Growth)
On quote (Tailored plan)
No free trial
Warm-up with expert calls
Bundles of 1, 3 or 10 mailboxes
Standalone warm-up
$29 (Starter, by daily volume)
$29 to $199, by daily volume
7-day trial
Warm-up, tests, verification
Daily volume shared by unlimited mailboxes
Standalone warm-up
Monthly billing, as listed on each vendor’s pricing page on October 18, 2026; Folderly only publishes yearly billing. For sending tools, the price shown is the cheapest plan that covers the mailboxes, sending included.
The 15 email warm-up tools, one by one
Who each tool suits, what it does best and where it falls short. A tool’s name links to its full comparison page once that page is published.
Warm-up for unlimited accounts; Premium pool sold separately
For: high-volume senders who connect many mailboxes and don’t need LinkedIn.
Strength: warm-up for as many accounts as you connect from $47 a month, in a network Instantly puts at 1,000,000+ accounts.
Limit: a workspace with more than 100 SMTP accounts on Growth drops to the Basic pool, the Premium pool costs from $500 a month, and there are no LinkedIn steps.
The pool follows the plan: Foundation on Base, Premium higher up
For: agencies and senders who rotate many mailboxes on email alone.
Strength: unlimited mailboxes and warm-up from $39 a month, and warm-up emails don’t count against the send quota.
Limit: Base warms in the entry Foundation pool, the Ultra Premium pool is reserved for accounts that pass Smartlead’s criteria, and LinkedIn isn’t covered.
Cold email platform whose warm-up runs through its partner TrulyInbox.
From
$41/month
Key difference
Warm-up in a separate TrulyInbox account
For: email-only teams that want sending, a lead database and warm-up in one subscription.
Strength: sequences and 1,500 Lead Finder credits a month from $41, with warm-up at no extra cost.
Limit: warm-up advertised as unlimited, but limited to 5 mailboxes warming at once on Starter (20 on Pro, 50 on Scale) according to its help center (checked on October 18, 2026); no LinkedIn.
Warm-up with calls from a deliverability expert in every plan.
From
$79/month
Key difference
Expert calls included, no IMAP access required
For: teams that want hands-on help to repair or protect a sender reputation.
Strength: a deliverability expert in every plan (1 call a month on Starter), without giving IMAP access.
Limit: $79 a month for one mailbox and $189 for 3, with no free trial.
Standalone warm-up
Warm-up billed by daily volume, unlimited mailboxes, with tests and verification.
From
$29/month
Key difference
Never billed per mailbox; placement tests and blacklist monitors included
For: senders who warm many mailboxes and want deliverability tools in the same subscription.
Strength: placement test credits (10 on Starter), blacklist monitors and email verification from $29 a month, with a daily cap per mailbox meant to keep the network clean.
Limit: no campaigns, and the daily volume of a plan is shared by all your mailboxes.
Email warmup service or warm-up included in your sending tool?
Warm-up is sold two ways. Standalone services (MailReach, lemwarm, TrulyInbox, Warmy and others) only warm: you connect the mailbox that sends from your usual tool. Sending tools such as Emelia, Instantly, lemlist, Smartlead and Saleshandy include warm-up in the plan that runs your campaigns. Warmup Inbox sits in between: a warm-up service whose plans also send cold email sequences.
The bill shows the difference. Warming 3 mailboxes costs $75 a month at MailReach or $87 with lemwarm bought alone, and neither sends your campaigns; Warmup Inbox ($57) adds email sequences, without LinkedIn. Emelia’s Start plan ($37) warms those 3 mailboxes and sends the campaigns, with a LinkedIn account and the email finder. At 50 mailboxes, the gap widens: $900 at MailReach and $475 at Warmup Inbox, against $97 for Grow.
Price is not Emelia’s edge over every sending tool, though. Instantly ($47) and Smartlead ($39) warm unlimited mailboxes for less than Grow; what Emelia adds is LinkedIn automation and the email finder in the same plan.
A standalone service makes sense when…
you are happy with your sending tool and only need to warm a few mailboxes, or you want what sending tools rarely include: placement tests (MailReach, Warmy, Mailivery), engagement on your real emails (InboxAlly) or a deliverability expert (Mailwarm, Folderly).
Included warm-up makes sense when…
you would otherwise pay twice, your number of mailboxes keeps growing, or you want one place to warm, send and follow replies. The cost of warm-up then stops growing with each new mailbox.
Free email warmup: what is really free
Few warm-up tools are free for good. Here is what each one lets you do before paying.
Permanent free plan: only TrulyInbox, for 1 account and 10 warm-up emails a day.
Free trials: 14 days at Instantly (2 accounts) and Smartlead; 10 days at InboxAlly; 7 days at Warmup Inbox, Mailivery, Warmy, Saleshandy, TrulyInbox’s paid plans and Emelia; Warmbox mentions one only on its agency page, without a length.
Free inside a paid plan only: lemwarm comes with lemlist’s paid plans, not with its 14-day trial; Instantly, Smartlead and Saleshandy include warm-up in every paid plan.
No trial: Mailwarm says it doesn’t offer one, and we found none at MailReach or Folderly.
Free tools that are not warm-up: MailReach’s spam test, Warmup Inbox’s placement test and Folderly’s 2 placement tests a month.
Why Emelia has no free plan
It is deliberate: a warm-up network anyone can join for free is hard to keep clean. You get 7 days to try Emelia without a card; after that, warm-up comes with the subscription, for every mailbox your plan connects.
How to choose an email warm-up tool
Four questions settle most choices between these email warming tools.
1. Who is in the warm-up network?
Your mailbox builds its reputation by exchanging emails with the others in the pool, so a shared pool is only as good as its senders. A cheap, unlimited network open to all is hard to keep free of careless high-volume senders, and vendors know it: several grade their own pools.
Instantly moves a whole workspace to its Basic pool when it connects more SMTP accounts than the plan allows (100 on Growth), and sells a Premium pool of high-quality, aged Google and Microsoft accounts from $500 a month. Smartlead ties the pool to the plan and opens its Ultra Premium pool only to accounts that meet criteria such as bounce rate and authentication. Mailivery caps each mailbox’s daily warm-up to protect its network.
Network sizes in vendors’ marketing, from 20,000+ domains to 1,000,000+ accounts, say nothing about who those senders are: ask how the vendor keeps bad senders out.
2. How is it billed?
Per mailbox (MailReach, Warmup Inbox, lemwarm, Folderly), by bundle (Warmbox, Mailwarm), by daily volume shared across your mailboxes (TrulyInbox, Mailivery, Warmy), or inside a sending plan (Emelia, Instantly, lemlist, Smartlead, Saleshandy). Run the numbers for your own mailbox count: the cheapest tool for one mailbox is rarely the cheapest for twenty.
3. What else do you need?
If you also send campaigns, look for emails or automate LinkedIn, a sending tool with warm-up included saves a subscription. If you need placement tests or an expert to repair a damaged reputation, MailReach, Warmy, Mailivery, InboxAlly, Mailwarm and Folderly are built for it.
4. Can you drive it from your stack?
An API lets you switch warm-up on for new mailboxes and pull their status automatically. Emelia’s API does both; Instantly opens its API from Hypergrowth, TrulyInbox from Starter, and Mailivery, Warmy and InboxAlly offer REST APIs.
Where Emelia fits, and when another tool is a better choice
Emelia includes warm-up in every plan, for every mailbox the plan connects: 3 on Start ($37 a month), 50 on Grow ($97), unlimited on Scale ($297, fair use up to 1,000). The same plan sends your cold email and LinkedIn campaigns, finds and verifies emails, and gives each mailbox a health score. Emelia’s warm-up has its own page.
It is also a network with rules, on purpose: after the trial you pay to warm, each plan caps the mailboxes it connects, and a mailbox leaves the network when its subscription ends.
Another tool will suit you better when:
you only warm mailboxes that send from another tool: TrulyInbox (free for one account, $29 sized for 3 inboxes) or Warmup Inbox ($19 for one) cost less;
you want placement tests or a deliverability expert: MailReach and Warmy include tests, Mailwarm and Folderly include expert help;
you send by email only, from many mailboxes: Instantly ($47) and Smartlead ($39) cover any number of mailboxes for less than Grow.
Email warm-up tools: frequently asked questions
What is the best email warm-up tool?
It depends on what you already use. To warm and send from one tool, look at Instantly, Smartlead, lemlist, Saleshandy or Emelia, which also adds LinkedIn and the email finder to the plan. To warm mailboxes that send from elsewhere, TrulyInbox and Warmup Inbox are among the cheapest ways to start, MailReach and Warmy add placement tests, and Mailwarm and Folderly add expert help.
Is there a free email warm-up tool?
TrulyInbox offers a free plan for 1 account and 10 warm-up emails a day. The other tools here offer trials or include warm-up in a paid plan. Emelia has no free plan: warm-up comes with every subscription, after a 7-day trial without a card.
Does email warm-up actually work?
It helps a new or quiet mailbox build a sending history before cold campaigns, but it does not replace the basics: SPF, DKIM and DMARC records, clean lists and reasonable daily volumes. A high warm-up score is no promise of inbox placement; the open and reply rates of your campaigns remain the real test.
How long should I warm up a new email account?
Plan two to three weeks before the first campaign, ten to fifteen days at the very least, and keep warm-up running while your campaigns go out. Our warm-up guide explains the ramp-up step by step.
What are the alternatives to Instantly’s email warm-up?
If you leave Instantly, check that your next sending tool includes warm-up: Emelia, lemlist, Smartlead and Saleshandy do. If you keep Instantly for sending but want a different warm-up network, a separate warm-up service such as MailReach, Warmup Inbox or TrulyInbox works alongside it.
Is warm-up included in Emelia’s price?
Yes, there is no warm-up add-on: every plan warms all the mailboxes it connects, starting at $37 a month for 3. Emelia’s pricing details each plan.
Do email warm-up tools send cold emails?
Most standalone services don’t: MailReach, lemwarm, TrulyInbox, Mailivery, Warmy, Warmbox, Mailwarm and Folderly warm or test. Warmup Inbox is the exception: its plans also send cold email sequences from the mailboxes it warms. Emelia, Instantly, lemlist, Smartlead and Saleshandy are sending tools first, with warm-up included.
At Findcustomer.io, we aim to democratize growth marketing and make it available to all businesses at a low cost. Emelia is a highly effective cold mailing tool at an unbeatable price.
Julien GalloCEO
A simple and affordable solution for setting up cold emailing to these prospects.
Anne ChénéCEO
As the head of multiple businesses, using Emelia's cold mailing tool allows me to confidently manage my campaigns by combining performance and simplicity.
Xavier DelahayeCEO
At Findcustomer.io, we aim to democratize growth marketing and make it available to all businesses at a low cost. Emelia is a highly effective cold mailing tool at an unbeatable price.
Julien GalloCEO
A simple and affordable solution for setting up cold emailing to these prospects.
Anne ChénéCEO
As the head of multiple businesses, using Emelia's cold mailing tool allows me to confidently manage my campaigns by combining performance and simplicity.
Xavier DelahayeCEO
At Findcustomer.io, we aim to democratize growth marketing and make it available to all businesses at a low cost. Emelia is a highly effective cold mailing tool at an unbeatable price.
Julien GalloCEO
A simple and affordable solution for setting up cold emailing to these prospects.
Anne ChénéCEO
As the head of multiple businesses, using Emelia's cold mailing tool allows me to confidently manage my campaigns by combining performance and simplicity.
Xavier DelahayeCEO
At Findcustomer.io, we aim to democratize growth marketing and make it available to all businesses at a low cost. Emelia is a highly effective cold mailing tool at an unbeatable price.
Julien GalloCEO
A simple and affordable solution for setting up cold emailing to these prospects.
Anne ChénéCEO
As the head of multiple businesses, using Emelia's cold mailing tool allows me to confidently manage my campaigns by combining performance and simplicity.
Xavier DelahayeCEO
At Findcustomer.io, we aim to democratize growth marketing and make it available to all businesses at a low cost. Emelia is a highly effective cold mailing tool at an unbeatable price.
Julien GalloCEO
A simple and affordable solution for setting up cold emailing to these prospects.
Anne ChénéCEO
As the head of multiple businesses, using Emelia's cold mailing tool allows me to confidently manage my campaigns by combining performance and simplicity.
Xavier DelahayeCEO
At Findcustomer.io, we aim to democratize growth marketing and make it available to all businesses at a low cost. Emelia is a highly effective cold mailing tool at an unbeatable price.
Julien GalloCEO
A simple and affordable solution for setting up cold emailing to these prospects.
Anne ChénéCEO
As the head of multiple businesses, using Emelia's cold mailing tool allows me to confidently manage my campaigns by combining performance and simplicity.
Xavier DelahayeCEO
It's not my profession - I'm a web developer and technical SEO specialist. I needed a simple and effective tool at a reasonable price. Look no further: Emelia meets all of these criteria.
Emile MoureauCo-founder
I was looking for a simple and effective tool to conduct my prospecting campaigns. Emelia is the perfect cold mailing tool!
Estelle KaraouniBusiness Development Manager
The tool is comprehensive, easy to use, and reasonably priced. No frills, just what I need to perform well on my cold mailing campaigns.
Thomas LucyGrowth Manager
It's not my profession - I'm a web developer and technical SEO specialist. I needed a simple and effective tool at a reasonable price. Look no further: Emelia meets all of these criteria.
Emile MoureauCo-founder
I was looking for a simple and effective tool to conduct my prospecting campaigns. Emelia is the perfect cold mailing tool!
Estelle KaraouniBusiness Development Manager
The tool is comprehensive, easy to use, and reasonably priced. No frills, just what I need to perform well on my cold mailing campaigns.
Thomas LucyGrowth Manager
It's not my profession - I'm a web developer and technical SEO specialist. I needed a simple and effective tool at a reasonable price. Look no further: Emelia meets all of these criteria.
Emile MoureauCo-founder
I was looking for a simple and effective tool to conduct my prospecting campaigns. Emelia is the perfect cold mailing tool!
Estelle KaraouniBusiness Development Manager
The tool is comprehensive, easy to use, and reasonably priced. No frills, just what I need to perform well on my cold mailing campaigns.
Thomas LucyGrowth Manager
It's not my profession - I'm a web developer and technical SEO specialist. I needed a simple and effective tool at a reasonable price. Look no further: Emelia meets all of these criteria.
Emile MoureauCo-founder
I was looking for a simple and effective tool to conduct my prospecting campaigns. Emelia is the perfect cold mailing tool!
Estelle KaraouniBusiness Development Manager
The tool is comprehensive, easy to use, and reasonably priced. No frills, just what I need to perform well on my cold mailing campaigns.
Thomas LucyGrowth Manager
It's not my profession - I'm a web developer and technical SEO specialist. I needed a simple and effective tool at a reasonable price. Look no further: Emelia meets all of these criteria.
Emile MoureauCo-founder
I was looking for a simple and effective tool to conduct my prospecting campaigns. Emelia is the perfect cold mailing tool!
Estelle KaraouniBusiness Development Manager
The tool is comprehensive, easy to use, and reasonably priced. No frills, just what I need to perform well on my cold mailing campaigns.
Thomas LucyGrowth Manager
It's not my profession - I'm a web developer and technical SEO specialist. I needed a simple and effective tool at a reasonable price. Look no further: Emelia meets all of these criteria.
Emile MoureauCo-founder
I was looking for a simple and effective tool to conduct my prospecting campaigns. Emelia is the perfect cold mailing tool!
Estelle KaraouniBusiness Development Manager
The tool is comprehensive, easy to use, and reasonably priced. No frills, just what I need to perform well on my cold mailing campaigns.
Thomas LucyGrowth Manager
Warm your mailboxes where your campaigns go out
Warm-up for every connected mailbox, cold email and LinkedIn in one plan, from $37 a month.
