COMPARISONS
Cold email inbox providers, compared one at a time
Each page below puts one vendor beside us using their own published numbers: price per mailbox, platforms, how mailboxes are isolated, and what happens to the domain. Where a vendor does not publish something, the page says so rather than guessing.
We sell 100 Microsoft 365 inboxes on a domain for $30 a month, or Google inboxes at $3 each, up to 3 on a domain. That is the reference point in every comparison, and each one says where the other vendor is the better choice.
| Provider | Published entry price | Platforms |
|---|---|---|
| coldemailinboxes.io | $30 / domain / month for 100 Microsoft inboxes · $3 / Google inbox / month | Microsoft, Google |
| Cheap Inboxes | $3.50 to $2.80 / mailbox / month | Google, Microsoft |
| Inboxkit | $3.00 / mailbox / month ($2.50 billed yearly); Azure $30 / tenant | Google, Microsoft, Azure |
| Maildoso | $75 / month for 30 SMTP mailboxes, down to $0.49 each | SMTP (Google listed as unavailable) |
| Mailforge | $3 / slot / month, minimum 10 (Primeforge Google or Microsoft $4.50) | Own shared infrastructure; Google and Microsoft via Primeforge |
| Premium Inboxes | $3.50 / inbox / month, down to $2.80 at 1,250+ | Google, Microsoft |
| ScaledMail | Microsoft $50 / domain (25 mailboxes) · Google $3.50 / mailbox · SMTP $3.75 / domain | Google, Microsoft, SMTP |
| Zapmail | $39 / month for 10 mailboxes, then $3.50 to $3.00 each | Google, Microsoft |
Cheap Inboxes alternative
Mailbox rental priced per mailbox, in four volume tiers.
Inboxkit alternative
Google, Microsoft and Azure mailboxes from $2.50 each billed yearly, with warmup and pre-warmed add-ons.
Maildoso alternative
SMTP mailboxes on its own servers and IPs, priced in volume tiers; Google currently unavailable.
Mailforge alternative
Mailboxes on a shared IP pool from $3 a slot; Google and Microsoft are sold separately as Primeforge.
Premium Inboxes alternative
Google and Microsoft inboxes at one per-inbox price, with replacements, an insured tier and an API.
ScaledMail alternative
Microsoft priced per domain at 25 mailboxes, Google and SMTP per mailbox, an isolated tenant per customer.
Zapmail alternative
Plan-based Google and Microsoft mailboxes, 3 to 5 per domain, with warmup sold alongside.
Prices are each vendor’s own and move; each page carries the date it was checked. For the category as a whole rather than one vendor at a time, see the cold email inbox buying guide.