Best Maildoso alternatives: mailbox and domain providers for cold email
Maildoso sells SMTP mailboxes in bundles: 30 for $75/mo, 300 for $225/mo and 1,000 for $499/mo. These providers sell Google, Microsoft or SMTP mailboxes for cold email, with DNS records configured for you.
How this list works: Ordered by lowest listed monthly entry price; tools priced per mailbox slot through a calculator are listed last. Pricing verified against vendor pages (latest check ). No placement here is paid. Methodology.
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| Tool | What it is | Price (vendor-published) | Free plan | Channels |
|---|---|---|---|---|
| InboxKit | Cold email infrastructure: buys and configures Google Workspace and Microsoft 365 mailboxes with automated DNS. | One flat rate per mailbox: $3.00/mailbox/mo monthly or $2.50 annual (Google Workspace or Microsoft 365); Azure $30 per tenant/mo (up to 100 mailboxes); pre-warmed mailboxes $6–$9/mo by warmup age plus a one-time domain fee from $12.50 | — | |
| Zapmail | Cold email infrastructure: pre-configured Google and Microsoft mailboxes with automated SPF, DKIM and DMARC. | Starter $39/mo (10 Google/Microsoft mailboxes, extra $3.50/mailbox); Growth $99/mo (30); Pro $299/mo (100, API) | — | |
| Mission Inbox | Email sending infrastructure with mailboxes on dedicated IPs for cold outreach. | Lite $50/mo (15 mailboxes, 5,000 sends/mo, upgrade required past the limits); Scale $199/mo (30 mailboxes, 10,000 sends/mo, then pay as you go at 1 credit = $1); dedicated IPs on both; the Pro $99/mo API-sending plan shown earlier is no longer listed | — | |
| Inframail | Flat-rate cold email infrastructure with Microsoft-backed inboxes and automated DNS setup. | Unlimited plan $147/mo (unlimited inboxes, ~80,000 emails/mo); Agency Pack $387/mo; done-for-you setup $797/mo (3-month minimum) | — | |
| Mailreef | Cold email sending infrastructure for agencies, priced as a platform fee plus a per-send rate. | Agency $240/mo with a 12-month commitment, or Agency Flex $249/mo month to month, each plus $0.001 per send; Enterprise custom | — | |
| Mailforge Visit Mailforge ↗ | Creates cold email domains and mailboxes in bulk with automated DNS setup; part of the Salesforge product family. | Shared mailbox infrastructure: $3 per mailbox slot/mo billed yearly (minimum 10 slots; e.g. 25 slots $60/mo yearly or $75/mo monthly); .com domains $14/year; automated DNS setup included | — | |
| Infraforge Visit Infraforge ↗ | Private, dedicated-IP email infrastructure for cold outreach; part of the Salesforge product family. | Calculator-based: mailbox slots $4/mo (billed yearly), .com domains $14/yr; dedicated IPs $99/mo each; no free trial | — | |
| Premium Inboxes | Cold-email inbox provider that sets up and monitors sending inboxes and domains, with auto-reconnect to sequencers. | $3.50 per inbox/mo (1-249 inboxes), $3.00 (250-1,249), $2.80 (1,250+), no monthly commitment; managed ECC service $7,500/mo by application | No | |
| ScaledMail | Cold email infrastructure provider that sets up Google, Microsoft and SMTP mailboxes and domains for outbound. | Priced per unit: Google Workspace $3.50/mailbox/mo; Microsoft Outlook $50/domain/mo (25 mailboxes per domain); SMTP $3.75/domain/mo (4 mailboxes per domain); SPF, DKIM and DMARC configured; reporting add-ons $2–5/mo | — | |
| Hypertide | Automated cold email infrastructure: Google and Microsoft inboxes set up with DNS and uploaded to your sequencer. | Google inboxes $3.30/inbox/mo with no packages or minimums; Microsoft (Entra) domains $25/domain/mo including 25 inboxes ($1 per inbox); automated setup and DNS | — |
FAQ
Which Maildoso alternatives offer Google or Microsoft mailboxes?
InboxKit ($3.00/mailbox/mo, $2.50 annual) and Zapmail ($39/mo for 10 mailboxes) sell both Google and Microsoft mailboxes, ScaledMail sells Google Workspace ($3.50/mailbox/mo) and Microsoft ($50/domain/mo with 25 mailboxes), and Hypertide sells Google inboxes ($3.30/mo) and Microsoft domains ($25/domain/mo with 25 inboxes).
Is there another SMTP option?
ScaledMail lists SMTP at $3.75/domain/mo with 4 mailboxes per domain.
Compare tools from this list
- Zapmail vs Mailforge
- Inframail vs Mailforge
- Infraforge vs Mailforge
- ScaledMail vs Zapmail
- Mission Inbox vs Mailforge
- Hypertide vs Zapmail
- Hypertide vs ScaledMail
- InboxKit vs Zapmail
- InboxKit vs Mailforge
- Premium Inboxes vs Zapmail
- Premium Inboxes vs Mailforge
- Premium Inboxes vs Inframail
Related roundups
- Best cold email infrastructure providers (mailboxes & domains)
- Best Hypertide alternatives: cold email mailbox providers
- Best Inframail alternatives: cold email infrastructure compared
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