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Warmy.io Alternative: Alienmail vs Warmy.io
How is Alienmail different from Warmy.io?
Reviewed by Ankit Dangi, Founder & CEO · Prices checked 27 Oct 2026
The short answer
Warmy.io is a dedicated warmup and inbox-testing tool, with plans from $49 a month priced by warmup volume. It doesn't send campaigns, so you pay for a sending tool as well. Alienmail includes warmup free on every mailbox, writes the campaign from your website and charges only for the emails you send. Warmy.io is the better pick if deeper warmup testing matters more to you than having one tool.
Pick Alienmail if you want warmup and sending in one place, with no separate warmup bill.
Alienmail publishes this page. Every Warmy.io price and limit comes from Warmy.io's own pricing page, linked under Sources.
Alienmail vs Warmy.io in Four Numbers
$0
warmup
Warmy.io: from $49 a month
$12
warmup plus 5,000 cold emails
Warmy.io: from $49, plus a sending tool
Yes
sends your campaigns
Warmy.io: needs a separate sender
100 free credits
to start, no card
Warmy.io: 7-day trial, no card
The Core Difference
Warmy.io sells warmup on its own: you pick a plan by how much warmup activity you need, connect your mailboxes, and keep sending campaigns from another tool. Alienmail is the sending tool, with warmup built in and free on every mailbox, so there's one bill and it covers only the emails you send.
Alienmail vs Warmy.io at a Glance
 Alienmail |  Warmy.io | Key difference | |
|---|---|---|---|
| What it is | Cold email platform with warmup built in | Warmup and inbox-testing tool | Warmy.io doesn't send campaigns |
| Warmup price | $0, every mailbox | From $49 a month | Free on Alienmail |
| How warmup is priced | Not charged | By warmup volume, not per inbox | — |
| Sends your campaigns | Yes | No, needs a separate sender | One tool instead of two |
| Inbox tests | — | Yes | Warmy.io wins on testing |
| Writes your emails | Yes, from your website | No | Alienmail starts with a full draft |
| Free start | 100 free credits, no card | 7-day trial, no card | — |
Alienmail vs Warmy.io Pricing
How each one charges
Warmy.io
Plans from $49 a month, priced by how much warmup they generate rather than by inbox. 7-day trial with no card. How many mailboxes each plan covers is not stated on its pricing page in a way we could confirm.
Alienmail
Warmup is free on every mailbox. You pay only for cold emails you send, at 4 credits each, from a $5 top-up.
| Mailboxes warming | Alienmail warmup | Warmy.io |
|---|---|---|
| 1 | $0 | From $49 a month |
| 5 | $0 | From $49 a month; plan depends on total warmup volume |
| 10 | $0 | From $49 a month; plan depends on total warmup volume |
| 20 | $0 | From $49 a month; plan depends on total warmup volume |
$49 is Warmy.io's starting price. More mailboxes usually means more warmup volume and a higher plan, so check which plan fits before you buy. With Warmy.io you also pay for a sending tool; on Alienmail, sending costs 4 credits an email, so 5,000 emails cost $12.
Cost reality: a team warming 10 mailboxes
An agency runs 10 mailboxes and sends 20,000 cold emails a month.
Warmy.io
At least $49 a month for warmup, and more if 10 mailboxes need a bigger plan, plus a sending tool. With Instantly Hypergrowth at $97, that's at least $146 a month.
Alienmail
Warmup $0, and 20,000 emails cost $48. That's the whole bill.
Cost per mailbox
- Warmy.io: not priced per mailbox. The cost per mailbox is your plan price divided by the mailboxes it covers, from $49 a month in total.
- Alienmail: $0 to warm any mailbox, bought or connected. A mailbox bought in Alienmail costs $2.50 a month; one you connect costs nothing extra.
So: on Warmy.io the warmup bill starts at $49 and grows with volume. On Alienmail, warmup stays at $0 however many mailboxes you add.
Mailboxes themselves cost extra either way: $2.50 each a month if you buy them in Alienmail.
Deliverability and Mailboxes
Inbox tests
Warmy.io includes inbox testing, so you can see whether your emails land in the inbox or spam.
List verification
Alienmail cleans bad and risky addresses before every send, free during beta. Warmy.io's pricing page doesn't list it.
Mailboxes
Warmy.io warms mailboxes you connect. Alienmail connects unlimited mailboxes and sells them at $2.50 a month, DNS set up.
Warmup Compared
How it works
Both warm a mailbox by building real-looking activity, so inbox providers learn to trust it. Warmy.io sells that as its own product, with inbox testing on top. Alienmail runs it in the background on every mailbox you add, bought or connected.
How much it sends
Warmy.io's plans are set by warmup volume, so more activity means a higher plan. Alienmail raises warmup and campaign sending together as each mailbox ages, so a new mailbox starts slow.
Where it runs
Warmy.io is a separate dashboard from your sender, so warmup and campaign limits are set in two places. On Alienmail they live in the same place, and warmup emails never use your credits.
Why Teams Switch From Warmy.io
Alienmail$0
warmup on Alienmail, every mailbox
Warmy.io$49
Warmy.io starting plan, every month
Warmup without a second bill.
Warmy.io plans start at $49 a month for warmup alone. On Alienmail, warmup is free on every mailbox.
One tool instead of two.
Warmy.io warms and tests but doesn't send, so you pay for a sender too. Alienmail warms and sends from the same place.
The campaign comes written.
Alienmail also writes the first email, follow-ups, subject lines and send times from your website.
What Alienmail Does Differently
Warms every mailbox free, in the tool that sends
Bought or connected, with no plan to buy and no inbox limit.
Raises sending as each mailbox earns trust
Daily limits follow the mailbox's age, so a new one starts slow.
Writes and sends the campaign
Add your website and Alienmail writes the sequence, then sends it from your warmed mailboxes.
Who Should Pick Warmy.io
- You want a specialist warmup tool with detailed testing, whatever you send from.
- You're happy paying for warmup and sending separately.
Who Should Pick Alienmail
- You want warmup bundled with the tool you send from, at no extra cost.
- You warm many mailboxes and don't want the warmup bill to grow with them.
- You also want your campaign written for you.
Other Warmy.io Alternatives
| Tool | Best for | Starts at | Watch out for | |
|---|---|---|---|---|
 MailReach | Warmup and spam tests for one or two mailboxes | $19.50 per mailbox/mo | Bill grows with every mailbox; no free trial; you still need a sender | Compare |
 Instantly | A sender with warmup on all plans | $47/mo | 1,000 contacts on Growth | Compare |
 Smartlead | A sender with warmup and lots of settings | $39/mo | 2,000 contacts on Base | Compare |
 Saleshandy | A sender with unlimited warmup on all plans | $41/mo | 1 seat on Starter | Compare |
How to Switch From Warmy.io
- 1
Sign up for Alienmail with 100 free credits, no card.
- 2
Connect the same Google Workspace, Microsoft 365 or SMTP mailboxes. Warmup starts the same day, free.
- 3
Turn off Warmy.io warmup on each mailbox once Alienmail's warmup is running, so it isn't warmed twice.
- 4
Add your website. Alienmail writes your Business DNA and a campaign.
- 5
Upload your list, review the emails and launch.
Note: cancel or downgrade your Warmy.io plan once every mailbox has moved.
or
Verdict: Alienmail or Warmy.io?
If you send cold email, Alienmail covers warmup for free: there's no $49-a-month warmup plan, and the same tool writes and sends your campaigns, with 5,000 emails costing $12. Warmy.io is the better buy if you're keeping a sender you like and want a specialist warmup dashboard with inbox testing on top.
Alienmail vs Warmy.io FAQ
If you also need to send campaigns, Alienmail: warmup is free on every mailbox and sending is pay per email. If you only want another warmup tool, MailReach is the closest match.
Key Terms
- Email warmup
- Slowly raising how much a new mailbox sends while it collects real opens and replies, so inbox providers learn to trust it.
- Warmup volume
- How many warmup emails a tool sends and answers for you each day. Warmy.io prices its plans by it.
- Inbox test
- Sending one email to a set of test inboxes to see whether it lands in the inbox, the promotions tab or spam.
- Sender reputation
- The trust inbox providers give a mailbox and domain, built from opens, replies, bounces and spam reports.
- Pay-per-email pricing
- Paying only for emails you send. On Alienmail, each email uses 4 credits and warmup is free.
How we compared
We took Warmy.io's starting price and plan basis from its own pricing page on 27 Oct 2026 and Alienmail's rates from alienmail.io/pricing. Warmy.io prices by warmup volume, so we show its starting price and don't guess which plan a given number of mailboxes needs. The sender in the cost example is Instantly Hypergrowth at $97, from Instantly's pricing page the same day. We don't include discounts or custom deals. Anything Warmy.io's pricing page doesn't mention is marked "not stated", not "not available". We re-check prices every quarter.
Sources
- Warmy.io pricing, checked 27 Oct 2026: plans from $49 a month, priced by warmup volume, not per inbox; 7-day trial with no card
- Instantly pricing, checked 27 Oct 2026: Hypergrowth $97 a month, used in the cost example
- Alienmail rate card, from alienmail.io/pricing; warmup facts from the Free Email Warmup doc
Warm Every Mailbox Free
Warmup is free on every Alienmail account. 100 free credits, no card.