October 26, 2026

Premium Inboxes pricing · $3.50 to $2.80 per inbox every 4 weeks by volume

Premium Inboxes charges $3.50 to $2.80 per inbox every 4 weeks, by volume band. Yearly billing is $35 to $28 per inbox a year, labeled “2 Months Free”.

The short answer

Pick Premium Inboxes if you send cold email across hundreds or thousands of inboxes. An inbox is one email account you send from.

Billed by the period, it costs $3.50 per inbox every 4 weeks for 1 to 249 inboxes. The next band, 250 to 1,249 inboxes, costs $3.00 per inbox every 4 weeks. At 1,250 inboxes or more, it drops to $2.80 per inbox every 4 weeks. Premium Inboxes asks for no monthly commitment. Billed yearly, the smallest band costs $35 per inbox a year, and the next two bands cost $30 and $28 per inbox a year.

Premium Inboxes fits big sending volumes.

Notebook sketch of three price tags: $3.50 per inbox every 4 weeks, $3.00 per inbox every 4 weeks, $2.80 per inbox every 4 weeks — Premium Inboxes price by volume band, billed every 4 weeks.

The three price bands

Three bands set the price. The first band runs from 1 to 249 inboxes, at $3.50 per inbox every 4 weeks. The second band runs from 250 to 1,249 inboxes, at $3.00 per inbox every 4 weeks. The third band starts at 1,250 inboxes, at $2.80 per inbox every 4 weeks.

The price steps down twice: once past 249 inboxes, and once past 1,249 inboxes.

Notebook sketch of a staircase with three steps: 1 to 249 inboxes at $3.50 per inbox every 4 weeks, 250 to 1,249 inboxes at $3.00 per inbox every 4 weeks, 1,250 or more inboxes at $2.80 per inbox every 4 weeks — The three volume bands, billed every 4 weeks.

Every 4 weeks against yearly billing

Premium Inboxes bills every 4 weeks, so a year holds 13 bills. Yearly billing is $35, $30 or $28 per inbox a year, labeled “2 Months Free”.

In the 1 to 249 band, 13 × $3.50 = $45.50 per inbox a year against $35 per inbox a year billed yearly. Paying yearly saves $10.50 per inbox a year. In the 250 to 1,249 band, 13 × $3.00 = $39 per inbox a year against $30, a saving of $9 per inbox a year. In the 1,250 or more band, 13 × $2.80 = $36.40 per inbox a year against $28, a saving of $8.40 per inbox a year.

The math: 300 inboxes at the middle band

300 inboxes falls in the 250 to 1,249 band: 300 × $3.00 = $900 every 4 weeks. Over a year, 13 × $900 = $11,700.

The same 300 mailboxes on InboxKit cost 300 × $3.00 = $900 a month billed monthly. Over a year, 12 × $900 = $10,800, so InboxKit costs $900 less a year. Billed yearly, the two tie at this volume. InboxKit is 12 × $2.50 = $30 per mailbox a year, and Premium Inboxes is $30 per inbox a year. Under 250 inboxes, InboxKit costs less: $30 per mailbox a year against $35 per inbox a year, both billed yearly. Premium Inboxes costs less only at 1,250 inboxes or more on yearly billing, where $28 per inbox a year beats $30 per mailbox a year.

Notebook sketch of 300 inbox icons boxed together, labelled $3.00 per inbox every 4 weeks, times 300, equals $900 every 4 weeks — 300 inboxes at the middle band, billed every 4 weeks.

What to ask before you buy

Ask Premium Inboxes whether domains come with your plan before you budget. A domain is the web address your mail comes from. Budget domains as a separate line you might buy.

Ask Premium Inboxes when your new inboxes will be ready before you plan a launch date.

When InboxKit fits a smaller list

Pick InboxKit if you run fewer than 250 inboxes. InboxKit charges $3.00 per mailbox a month billed monthly, or $2.50 per mailbox a month billed yearly. InboxKit sets no minimum order, so a handful of mailboxes costs the same per mailbox as a large order.

InboxKit fits smaller sending volumes.