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Reply.io Alternative: Alienmail vs Reply.io
How is Alienmail different from Reply.io?
Reviewed by Ankit Dangi, Founder & CEO · Prices checked 27 Oct 2026
The short answer
Reply.io's Email Volume plan costs $59 a month for 1,000 active contacts, with emails unlimited under fair use and warmup on every mailbox. Alienmail charges per email: a 4-step campaign to 1,000 contacts is 4,000 emails and costs $10, and it writes the campaign for you. Pick Reply.io if you want a broader sales engagement platform.
Pick Alienmail if you only need cold email, your volume changes month to month, or your list keeps growing.
Alienmail publishes this page. Every Reply.io price and limit comes from Reply.io's own pricing page, linked under Sources.
Alienmail vs Reply.io in Four Numbers
$10
1,000 contacts × 4 emails
Reply.io Email Volume: $59
$0
a month you don't send
Reply.io: $59
Unlimited
contacts
Reply.io entry tier: 1,000 active a month
100 free credits
to start, no card
Reply.io: 14-day trial
The Core Difference
Reply.io prices by people: its Email Volume plan charges by how many active contacts you reach in a month, and emails to them are unlimited under fair use. Alienmail prices by emails: add your website and it drafts the whole sequence, then charges 4 credits for each email it sends, however many contacts are on your list. Reply.io rewards many touches to a steady list; Alienmail rewards growing lists and uneven months.
Alienmail vs Reply.io at a Glance
 Alienmail |  Reply.io | Key difference | |
|---|---|---|---|
| How you pay | Per email sent | Monthly plan, by active contacts | Alienmail costs nothing in a quiet month |
| Entry price | From a $5 top-up | $59/mo (Email Volume, 1,000 contacts) | Lower to start on Alienmail |
| Contacts | Unlimited | 1,000 active a month on the entry tier | A growing list moves you up a Reply.io tier |
| Emails | As many as your credits cover | Unlimited, under fair use | Reply.io doesn't charge per email |
| Warmup | Free, every mailbox | Included with every mailbox | Same |
| Users | Free, unlimited | Unlimited, as listed on its pricing card | Same, if Reply.io's wording holds |
| Scope | Cold email | Wider sales engagement platform | Reply.io covers more than email |
| Who writes the emails | Alienmail, from your website | You, in its sequence editor | Alienmail starts with a full draft |
| Free start | 100 free credits, no card | 14-day trial | — |
Alienmail vs Reply.io Pricing
How each one charges
Reply.io
Email Volume $59 a month ($49 billed yearly) for 1,000 active contacts, with unlimited emails and mailboxes under fair use and warmup on every mailbox. Higher contact tiers cost more.
Alienmail
No plan. Each email uses 4 credits; top-ups start at $5 and the rate per credit drops at $10, $50 and $250.
| Contacts × emails in a month | Alienmail | Reply.io |
|---|---|---|
| None | $0 | $59 (Email Volume) |
| 1,000 × 4 (4,000 emails) | $10 | $59 (Email Volume) |
| 1,000 × 6 (6,000 emails) | $15 | $59 (Email Volume) |
| 5,000 × 5 (25,000 emails) | $50 | Higher contact tier |
| 25,000 × 4 (100,000 emails) | $160 | Higher contact tier |
For a normal 4 to 6 step campaign, Alienmail costs less at 1,000 contacts. Reply.io only catches up if you send each of those 1,000 contacts about 37 emails or more in a month, which few cold campaigns do. Mailboxes cost extra on both: $2.50 each a month if you buy them in Alienmail.
Cost reality: a small team's month
A founder sends to 1,000 new leads a month, 4 emails each: 4,000 emails.
Reply.io
Email Volume fits, at $59. If the list grows past 1,000 active contacts in a month, you move to a higher tier.
Alienmail
16,666 credits from a $10 top-up: $10. A bigger list only costs the extra emails you send.
Cost per 1,000 emails
- Reply.io Email Volume, 1,000 contacts × 4 emails: $14.75 per 1,000 emails ($59 ÷ 4,000).
- Reply.io Email Volume, 1,000 contacts × 6 emails: $9.83 per 1,000.
- Alienmail: $2.40 per 1,000 from a $10 top-up, falling to $1.20 from $250.
So: because Reply.io charges per contact, its cost per email falls the more steps you send. For typical cold campaigns, Alienmail still costs less per email.
Deliverability and Mailboxes
Warmup
Both include warmup on every mailbox you connect, at no extra cost. Alienmail also warms the mailboxes you buy from it.
List verification
Alienmail cleans bad and risky addresses before every send, free during beta. Reply.io's options weren't checked.
Mailboxes
Both connect Google, Microsoft 365 and SMTP mailboxes. Alienmail also sells mailboxes at $2.50 a month with DNS set up.
Writing and Workflow
Who writes the campaign
In Reply.io you write the sequence yourself. Alienmail reads your website and writes every email for you to edit.
Scope
Reply.io is a sales engagement platform. Alienmail does cold email only, from writing to replies.
Running it from an AI chat
Alienmail has its own MCP server, so you can launch campaigns and check replies from Claude or ChatGPT.
Why Teams Switch From Reply.io
Alienmail$10
1,000 contacts × 4 emails on Alienmail
Reply.io$59
Reply.io Email Volume, every month
Pay by email, not by contact tier.
Reply.io prices by active contacts, starting at $59 a month for 1,000. On Alienmail, a 4-step campaign to those 1,000 contacts costs $10.
AlienmailUnlimited
contacts on Alienmail
Reply.io1,000
active contacts on Reply.io Email Volume
A growing list doesn't move you up a tier.
Alienmail doesn't price by contacts, so adding leads only costs the emails you send to them.
Built for cold email only, and it writes the campaign.
Reply.io is a full sales engagement platform. Alienmail does cold email and writes the sequence from your website.
What Alienmail Does Differently
Writes the campaign from your website
Add your URL and Alienmail writes a brief of what you sell, who buys it and how you talk, then the whole sequence from it.
Charges per email, not per contact
4 credits an email from a $5 top-up, and $0 in a month you don't send.
You send
5,000 emails
You pay
$12
20,000 credits at $0.60 per 1,000 · 4 credits an email
Verifies your list before every send
Bad addresses come off before they bounce, at no extra cost during beta.
Email verification
Who Should Pick Reply.io
- You want more than cold email in one sales platform.
- Your active contacts stay near 1,000 a month and you send steadily.
- You send many touches to the same contacts each month.
Who Should Pick Alienmail
- You only need cold email, written and sent for you.
- Your volume changes month to month.
- Your list is growing and you don't want to climb contact tiers.
Other Reply.io Alternatives
| Tool | Best for | Starts at | Watch out for | |
|---|---|---|---|---|
 Smartlead | High-volume senders who want lots of settings | $39/mo | 2,000 contacts on Base; a lot to learn | Compare |
 Saleshandy | A simple flat-price sender | $41/mo | 1 seat and 2,000 active prospects on Starter | Compare |
 Instantly | Finding leads and sending in one tool | $47/mo | 1,000 contacts on Growth | Compare |
 lemlist | Email plus LinkedIn and calls | $69/mo | Multichannel is $109 per user | Compare |
How to Switch From Reply.io
- 1
Export your contacts from Reply.io as a CSV.
- 2
Sign up for Alienmail with 100 free credits, no card.
- 3
Connect the same Google Workspace, Microsoft 365 or SMTP mailboxes. Warmup carries on free.
- 4
Add your website. Alienmail writes your Business DNA and a new campaign.
- 5
Upload the CSV, review the emails and launch. Steps other than email don't carry over.
Work Out Your Own Numbers
Open the cold email cost calculator, preset to Reply.io with 1,000 new leads × 4 emails, and change it to your own volume.
Reply.io
Their cheapest plan that fits
Alienmail
Only the emails you send
or
Verdict: Alienmail or Reply.io?
For teams that only need cold email, Alienmail costs less: a 4-step campaign to 1,000 contacts is $10 instead of $59, a growing list doesn't push you up a tier, a quiet month is free, and the campaign arrives written. Reply.io is the better pick if you want a wider sales engagement platform and your active contacts stay steady.
Alienmail vs Reply.io FAQ
If you only send cold email, Alienmail: it charges per email and writes the campaign for you. If you use Reply.io for more than email, it's harder to replace with one tool.
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.
- Active contacts
- The people you reach in a month, which is how Reply.io prices its Email Volume plan. The entry tier allows 1,000.
- Fair use
- A limit that isn't a fixed number but stops very heavy use. Reply.io's unlimited emails and mailboxes come with one.
- Pay-per-email pricing
- Paying only for emails you send. On Alienmail, each email uses 4 credits.
- Credits
- Alienmail's unit of payment, bought in top-ups from $5. The price per credit drops as the top-up grows.
How we compared
We took each tool's monthly-billing prices and plan limits from its own pricing page on 27 Oct 2026 and Alienmail's rates from alienmail.io/pricing. Alienmail's cost uses the cheapest top-up that covers the emails. We don't include discounts or custom deals. Anything Reply.io's pricing page doesn't mention is marked "not stated" or "not checked", not "not available". We re-check prices every quarter.
Sources
- Reply.io pricing, checked 27 Oct 2026: Email Volume $59 ($49 yearly) for 1,000 active contacts; unlimited emails and mailboxes under fair use; warmup with every mailbox; unlimited users as listed; 14-day trial
- Alienmail rate card, from alienmail.io/pricing
Try Alienmail Free Next to Reply.io
100 free credits, no card. Pay only for the emails you send.