Maildoso is the cheapest way on this list to get a lot of cold email mailboxes. Its pricing page lists 30 mailboxes for $75 a month, 300 for $225 and 1,000 for $499, which works out to as little as $0.49 a mailbox. Domains are $12 a year, and it now also sells pre-warmed domains at $11.90 a month each, with up to 50 mailboxes per domain. The catch is the kind of mailbox. Maildoso's standard mailboxes are SMTP accounts on its own servers and IP addresses, not Google Workspace or Microsoft 365, and each sends up to 15 cold emails a day. Its FAQ says the infrastructure is optimized for B2B outreach, so campaigns to personal Gmail or Yahoo addresses may see reduced placement. To address that, Maildoso has started offering Google Workspace mailboxes too, though its pricing page does not list a price for them.
Most people who look for a Maildoso alternative want one of two things: real Google or Microsoft mailboxes, because their prospects sit on Google and Microsoft too, or fewer moving parts, because buying mailboxes from one vendor and sending from another means two dashboards and an export. The six options below cover both. Every price comes from the provider's own site as we read it on November 14, 2026. Vendors change pricing often, so check the page on the day you buy.
Maildoso alternatives at a glance
| Provider | Mailbox type | Price on its site | Minimum |
|---|---|---|---|
| Zapmail | US-hosted Google Workspace, with separate pre-warmed plans | Starter $39/mo with 10 mailboxes, extras $3.50 each; pre-warmed Starter $24/mo for 3 mailboxes after a $39 first month | 10 mailboxes (3 on pre-warmed) |
| Primeforge | Google Workspace and Microsoft 365 | $4.50 to $3.50 per mailbox per month; 2 months free on yearly billing | 10 mailbox slots |
| Infraforge | Private infrastructure on dedicated servers | $4 to $3 per mailbox per month; dedicated IPs $99/mo each | 10 mailbox slots |
| SuperSend | Sequencer: connect your own inboxes free, or buy Google or Outlook inboxes in the app | Inboxes $5/mo each, domains $13/yr; plans from $59/mo | One inbox |
| Instantly | Sequencer that sells done-for-you Google inboxes or its own AirMail inboxes | Google inboxes $5/mo; AirMail $4 per inbox; plans from $47/mo | One inbox |
| Smartlead | Sequencer that sells Google, Outlook and SMTP mailboxes through SmartSenders | Google or Outlook $4.50/mo, SMTP from $3.99/mo, pre-warmed $9/mo; plans from $39/mo | Not stated |
1. Zapmail: if you want Google mailboxes, warm or not
Zapmail sells US-hosted Google Workspace mailboxes only. Starter is $39 a month with 10 mailboxes and extras at $3.50, Growth is $99 with 30 and extras at $3.25, and Pro is $299 with 100 and extras at $3.00, with two months free on yearly billing. Pre-warmed mailboxes are separate plans: Starter costs $39 for the first month and then $24 a month for 3 pre-warmed mailboxes and a domain, with extra mailboxes at $8; Growth is $149 then $84 for 12; Pro is $339 then $180 for 30. Zapmail sets up SPF, DKIM, DMARC and tracking domains automatically and exports to sending tools such as Instantly, Smartlead, Reply and Lemlist. Its FAQ says it has a no-refund policy. Read our Zapmail alternatives if you are weighing the two.
2. Primeforge: if you want Google or Microsoft mailboxes with slot swaps
Primeforge sells Google Workspace and Microsoft 365 mailboxes. Its homepage lists $4.50 to $3.50 per mailbox a month, and its calculator prices 25 mailboxes at $4.50 each: $94 a month billed yearly or $113 billed monthly. You buy slots, with a minimum of ten, and pay for every slot whether or not it holds a mailbox, but a slot can be emptied and refilled with a new mailbox at no extra cost when one goes bad. There is no free trial, you can cancel anytime, and .com domains are $14 a year.
3. Infraforge: if you want private infrastructure and dedicated IPs
Infraforge is the closest to Maildoso in spirit: private email infrastructure on dedicated servers. Its homepage lists $4 to $3 per mailbox a month, with a minimum of ten slots, and its calculator prices 25 mailboxes at $4 each: $83 a month billed yearly or $100 billed quarterly. Dedicated IPs are $99 per IP per month, and .com domains are $14 a year. Choose it over Maildoso when you want your own IPs rather than a pool the provider rotates for you.
4. SuperSend: if you want the mailboxes where you send
Every option above hands you mailboxes to export into a sequencer. SuperSend is the sequencer. You connect the Google or Outlook inboxes you already have for free, or buy inboxes at $5 a month and domains at $13 a year inside the same app, with SPF, DKIM and DMARC set up for you. Warmup runs on every inbox, placement tests and a bounce guard run next to the campaign, and the default cap is 15 emails per mailbox per day, the same as Maildoso's. Plans start at $59 a month for 15,000 emails with unlimited contacts, and email and LinkedIn steps run in one sequence. Purchased inboxes do not arrive pre-warmed.
5. Instantly: if you already send from Instantly
Instantly sells done-for-you Google inboxes at $5 a month each, set up in 24 to 72 hours, or AirMail inboxes on its own infrastructure at $4 each. Outreach plans are Growth at $47 a month, Hypergrowth at $107 and Light Speed at $358. If your campaigns already live in Instantly, buying the mailboxes there removes the export step. Our Instantly alternatives page covers the sending side.
6. Smartlead: if you want Google, Outlook and SMTP in one place
Smartlead's SmartSenders sells Google, Outlook and SMTP mailboxes, including pre-warmed ones that can send the same day, and says it sources them from providers including Zapmail and Mailreef. Smartlead's pricing page lists fresh Google or Outlook mailboxes at $4.50 a month, Outlook via InfraInbox at $5, SMTP via Mailreef at $3.99 and via AeroSend at $4.20, and pre-warmed Google or Outlook at $9, with domains at $13 to $19 a year. Smartlead plans are Base at $39 a month, Pro at $94, Smart at $174 and Prime at $379. See our Smartlead alternatives if you are weighing it.
Which Maildoso alternative to pick
- You want the lowest price per mailbox and send only to business addresses: stay with Maildoso.
- You want Google mailboxes: Zapmail, or Primeforge if you also want Microsoft.
- You want dedicated IPs: Infraforge.
- You want to stop exporting mailboxes between tools: a sequencer that sells inboxes, such as SuperSend, Instantly or Smartlead.
FAQ
Is Maildoso Google Workspace? Its standard mailboxes are not: they are SMTP mailboxes on Maildoso's own servers and IP addresses. Maildoso has started offering Google Workspace mailboxes as well, for sending to personal email providers.
How many emails can a Maildoso mailbox send? Maildoso's pricing page caps each mailbox at 15 cold emails a day. Its FAQ says SMTP mailboxes have no slow ramp-up. SuperSend's default is also 15 a day per mailbox, adjustable per mailbox.
Can I take my domains with me if I leave Maildoso? Maildoso says domains bought through it stay registered with Maildoso while you use the service and are transferred back at no charge when you ask.
Next step
If you want mailboxes and campaigns in one place, sign up for SuperSend free. Connect an inbox you already own, or buy one in the app, and run warmup before your first send.
