Choose Mailpool if you want SMTP, Google Workspace and Microsoft 365 inboxes in one dashboard, an annual discount, or a dedicated IP server with unlimited inboxes: as of October 2026 its inboxes are $3 (its own SMTP), $4 (Google) and $5 (Outlook) per inbox per month, 15% less on annual billing. Choose Winnr if you want SMTP mailboxes for less: 50 cost $69 a month against $150 for 50 Mailpool inboxes, and 200 cost $189 against $600. Connecting your own domains is free on Winnr, warming is $0.60 per mailbox, and there is a pre-warmed marketplace.
Mailpool facts below come from mailpool.ai and its help center at docs.mailpool.ai, read on October 6, 2026. The old mailpool.io address now redirects to mailpool.ai. Winnr's prices are on the public pricing page.
What Mailpool offers as of October 2026
- Five inbox options: Mailpool inboxes (its own SMTP inboxes on a network of shared, rotating IPs), Google Workspace inboxes, Microsoft 365 Outlook inboxes, a dedicated IP, and dedicated infrastructure for outreach platforms.
- Monthly prices: $3 per Mailpool inbox, $4 per Google Workspace inbox and $5 per Microsoft 365 inbox, per month. A dedicated IP is $200 per server per month. Dedicated infrastructure is quoted on demand.
- Annual prices ("save 15%"): $2.60, $3.40 and $4.30 per inbox per month, and $170 for a dedicated IP. Its Google and Outlook product pages headline "just $3.50" per inbox, which differs from the pricing page, so check at checkout.
- Volume pricing: custom pricing and volume discounts for agencies and large senders, on request.
- Domains: bought in Mailpool with an AI domain generator and registered on a 1-year basis, or imported by pointing your nameservers to Mailpool. Its billing article lists both buying and importing domains as one-time payments; the amounts are not on the pricing page. Importing a domain deletes its existing DNS records and mailboxes.
- Included: automated SPF, DKIM and DMARC, domain forwarding, blacklist monitoring, CSV export and native integrations, an API and live-chat support.
- Warm-up is bought as warm-up slots in Mailpool's billing settings; the price is not on the pricing page.
- Terms: no free trial, but you can start for $3 with one mailbox, and there are no setup fees. Google and Outlook inboxes carry a one-month commitment. You can cancel from the dashboard, and after cancelling you can ask for domains created in Mailpool to be transferred to you.
Winnr vs Mailpool at a glance
| Winnr | Mailpool (Oct 2026) | |
|---|---|---|
| Mailbox types | SMTP/IMAP on Winnr's own sending infrastructure | Its own SMTP inboxes on shared rotating IPs, Google Workspace, Microsoft 365, dedicated IP |
| Price | $69/month for 50 ($1.38 each), $189 for 200 ($0.95 each), then $1 per extra mailbox | $3 SMTP, $4 Google, $5 Outlook per inbox per month; 15% less on annual billing |
| Minimum | Startup plan, 50 mailboxes included | One inbox ($3) |
| Daily sending guidance | 10 to 20 cold per mailbox (15 default), 50 or under including warming | SMTP inbox 30 recommended (200 max); Google 25 to 40; Outlook 20 to 25 |
| Mailboxes per domain | Up to 10 (5 recommended) | Up to 5 (3 recommended) |
| Domains | One-time purchase, about $13 for a .com; connecting your own is free | Bought or imported for a one-time payment; prices not published on the pricing page |
| Warmup | Built in, $0.60/mailbox/month | Warm-up slots; price not published on the pricing page |
| Ready-to-send option | Pre-warmed mailboxes, $3/address/month, no minimum term | Not listed on the pricing page |
| Dedicated IP | Optional, $20/IP/month on Enterprise | $200 per server per month ($170 annual), unlimited inboxes, charged for volume sent |
| Billing | Monthly, no annual contract, cancel anytime | Monthly or annual; Google and Outlook inboxes need a one-month commitment |
| Money back | 90% deliverability guarantee: ask and Winnr refunds your most recent month | Not described on the pricing page |
| API and integrations | REST API, MCP server, CSV exports for 20+ sequencers | API, CSV export and native integrations |
Cost at 50, 200 and 1,000 mailboxes
Monthly cost of the mailboxes only, before domains and warming. Mailpool's published prices are per inbox, so mailboxes × price (200 × $3 = $600); annual billing in brackets. Mailpool offers volume discounts on request, so its 1,000-mailbox figures are the most you would pay. Winnr is the plan price plus $1 for each mailbox above it.
| Mailboxes | Winnr | Mailpool SMTP | Mailpool Google | Mailpool Outlook |
|---|---|---|---|---|
| 50 | $69 (Startup) | $150 ($130) | $200 ($170) | $250 ($215) |
| 200 | $189 (Enterprise) | $600 ($520) | $800 ($680) | $1,000 ($860) |
| 1,000 | $989 ($189 + 800 × $1) | $3,000 ($2,600) | $4,000 ($3,400) | $5,000 ($4,300) |
Domains. At Winnr's recommended 5 mailboxes per domain you need 10, 40 and 200 domains: $130, $455 (Enterprise includes 5 free domain purchases) and $2,535 one-time at about $13 per .com, or nothing if you connect domains you already own. At Mailpool's recommended 3 per domain you need 17, 67 and 334 domains, at prices shown in its app.
Dedicated IP. Mailpool's dedicated IP is a different product from Winnr's: $200 a month for a server with unlimited inboxes, billed on the volume you send, with a 100,000-emails-per-month ceiling per IP in its help center. Winnr's dedicated IPs are an optional $20 per IP per month on Enterprise; most Winnr mailboxes send from shared, managed infrastructure (how dedicated IPs work on Winnr).
Monthly cost per 1,000 daily cold sends
What you pay each month for every 1,000 emails you can send per day: monthly price per mailbox ÷ emails per mailbox per day × 1,000. We use each provider's own recommendation: 30 a day for a Mailpool SMTP inbox, the top of its ranges for Google (40) and Outlook (25), and Winnr's default of 15 cold a day. Mailpool's help center does not say whether its figures include warm-up emails; Winnr's 15 is cold email only, with up to 50 a day in total once warming is counted.
| Option | Per mailbox / month | Emails / mailbox / day | Monthly cost per 1,000 daily cold sends |
|---|---|---|---|
| Winnr, 50 mailboxes | $1.38 | 15 cold | $92.00 |
| Winnr, 200 mailboxes | $0.95 | 15 cold | $63.00 |
| Winnr, 1,000 mailboxes | $0.99 | 15 cold | $65.93 |
| Mailpool SMTP, monthly | $3.00 | 30 | $100.00 |
| Mailpool SMTP, annual | $2.60 | 30 | $86.67 |
| Mailpool Google, monthly | $4.00 | 40 | $100.00 |
| Mailpool Outlook, monthly | $5.00 | 25 | $200.00 |
Mailpool recommends more emails per inbox than Winnr, so the per-send gap is much narrower than the per-mailbox gap. At 50 mailboxes, Mailpool's annual SMTP rate at 30 a day ($86.67) is slightly below Winnr at 15 a day ($92.00). At 200 and 1,000 mailboxes Winnr is cheaper per send, and running Winnr mailboxes at 20 cold a day, the top of its range, brings Winnr to $69.00, $47.25 and $49.45. If Mailpool's 30 a day includes warm-up emails, its cost per cold email is higher than shown.
When Mailpool is the better fit
- You want Google Workspace or Microsoft 365 inboxes next to SMTP inboxes in one dashboard. Winnr does not sell Google or Microsoft accounts.
- You want to start very small. One Mailpool inbox costs $3; Winnr's entry plan is $69 for 50.
- You prefer annual billing for 15% off. Winnr is monthly only.
- You send high volume from your own IP and want a server with unlimited inboxes, or white-label dedicated infrastructure for a platform you run.
- You want to send 30 a day per inbox, in line with Mailpool's own guidance.
When Winnr is the better fit
- Price per mailbox. 50 Winnr mailboxes cost $69 a month against $150 on Mailpool SMTP and $200 on Mailpool Google; 200 cost $189 against $600 and $800.
- Free domain connections. Connecting a domain you already own costs nothing on Winnr, either by pointing its nameservers to Winnr or by adding Winnr's records at your current DNS host, and Winnr sets SPF, DKIM and DMARC (at p=reject by default).
- Prices you can see before you sign up: domains (about $13 for a .com, one-time), warming ($0.60 per mailbox per month) and dedicated IPs ($20 per IP per month) are all published.
- Ready to send now: pre-warmed mailboxes at $3 per address per month, no minimum term, each listing with a health score and blocklist check.
- Fewer domains: up to 10 mailboxes per domain (5 recommended) instead of 5 (3 recommended).
- Automation: a REST API and an MCP server for provisioning from scripts or AI agents, plus a universal inbox for replies across every mailbox.
For how SMTP mailboxes compare with Google and Microsoft inboxes, see SMTP for cold email. Other comparisons: Winnr vs Maildoso, Winnr vs Mailforge, Winnr vs InboxKit, Winnr vs Zapmail, and all Winnr alternatives.
Frequently asked questions
Is Mailpool cheaper than Winnr?
Per mailbox, no. As of October 2026, 50 Mailpool SMTP inboxes cost $150 a month ($130 on annual billing) against $69 on Winnr, and 200 cost $600 against $189. Per email sent the gap is narrower, because Mailpool recommends 30 emails a day per SMTP inbox and Winnr recommends 15 cold a day by default. Mailpool is cheaper if you need only a few inboxes, since one costs $3.
What does Mailpool sell?
Mailpool sells its own SMTP inboxes on shared rotating IPs ($3 per inbox per month), Google Workspace inboxes ($4), Microsoft 365 Outlook inboxes ($5), dedicated IP servers ($200 per month) and custom dedicated infrastructure, with domains, DNS setup and exports handled in one dashboard. Annual billing is 15% less.
How many emails per day can a Mailpool inbox send?
Mailpool's help center recommends 30 emails a day for its own SMTP inboxes (200 maximum), 25 to 40 for Google Workspace inboxes and 20 to 25 for Microsoft 365 inboxes. Winnr recommends 10 to 20 cold emails per mailbox per day, 15 by default, with no more than 50 in total including warming.
Can I use my own domains on Mailpool and Winnr?
Yes on both. Mailpool imports a domain when you point its nameservers to Mailpool; its billing article lists domain imports as a one-time payment, and the import deletes the domain's existing DNS records and mailboxes. On Winnr, connecting a domain you already own is free, by pointing the nameservers or adding the records yourself.
Does Mailpool have a free trial?
No. Mailpool's pricing FAQ says there is no free trial, but you can start for $3 with one mailbox. Winnr also has no free trial: creating an account needs no card, but mailboxes need a paid plan, which starts at $69 a month for 50.
Does Winnr sell Google Workspace or Outlook inboxes?
No. Winnr mailboxes are SMTP/IMAP accounts on Winnr's own sending infrastructure. If you need Google Workspace or Microsoft 365 inboxes, Mailpool and the other providers in our Winnr alternatives guide sell them.
About this comparison. Winnr publishes this page. Mailpool facts were checked on October 6, 2026 at mailpool.ai/pricing (prices and pricing FAQ), mailpool.ai and its solution and product pages, and Mailpool's help center: choosing an inbox type (sending limits), billing, purchasing domains, importing domains and warm-up slots. Inboxes per domain are from Mailpool's post How many inboxes do you need to send 10,000 emails a day. A request to mailpool.io returns a 301 redirect to mailpool.ai. Prices are in USD, before tax, and change often, so check each provider's site before you buy. If something here is out of date, email info@winnr.app and we will correct it.