Primeforge Pricing 2026: $4.50 a Mailbox and Real Cost

Primeforge charges $4.50 per mailbox slot a month on monthly billing, falling to $3.50 above 1,000 add-on slots, or $3.75 a month on yearly billing. The minimum is 10 slots. The mailboxes are Google Workspace and Microsoft 365. Warmup and sending are not in the price: they are separate Forge products (Warmforge and Salesforge) or another tool. Domains are $14 a year.

Prices below are from primeforge.ai/pricing and the plan calculator on that page, checked September 28, 2026.

Primeforge Plans and Prices

Primeforge sells one product, Google Workspace and Microsoft 365 mailboxes set up for cold email, priced per slot. Unlike Infraforge, its sister product for private SMTP, it offers monthly billing.

How the tiers work, per the calculator: the first 10 slots are always billed at the top price, and the number of slots above 10 sets the tier for the rest. The minimum order is stated plainly: "We sell minimum 10 mailbox slots".

Yearly billing is $45 per slot a year ($3.75 a month) for 1–100 add-on slots, $44 for 101–200, down to $35 above 1,000 add-on slots (about $2.92 a month). The page says: "When choosing annual billing for mailboxes you will automatically receive a discount - 2 months free. There is no discount for domains." For 25 mailboxes the calculator shows $113 a month billed monthly and $94 a month billed yearly.

What the Slot Price Includes

• Google Workspace and Microsoft 365 mailboxes. Primeforge says: "Those are specifically Google Workspace and MS365 mailboxes with US IP addresses."

• One Microsoft tenant per domain: "In Primeforge we have 1 tenant per domain."

• Automated DNS setup, inbox hosting and maintenance, and support.

• Access to the Primeforge API.

Not included: warmup, a sequencer and placement tests. The home page tells you to add mailboxes "to Salesforge or any other sending software".

Costs on Top of the Slot Price

There is no free trial. You can cancel any time, and there is no contract; the pricing page does not state a refund policy. You can also connect domains you already own from any registrar; the home page says a domain connection fee applies but does not give the amount.

What Primeforge Costs at 625, 2,500 and 10,000 Emails a Day

Monthly cost on monthly billing, from the slot tiers above. The full setup adds warmup and a sequencer: we use the cheapest Instantly plan that covers the emails and new contacts a month (method), because the vendor's mailboxes cannot send campaigns on their own. We compare at the same emails a day, each vendor at its own emails per mailbox a day: a cheap mailbox that sends fewer emails needs more mailboxes for the same volume. Primeforge is counted at 30 cold emails a mailbox a day, Outreach2day at 25, because Instantly includes warmup in the plan. Domains are left out.

At 334 slots, 10 are billed at $4.50 and 324 add-on slots at the 301–400 tier of $4.20. With Warmforge instead of Instantly warmup, add its per-slot price (at 25 slots, $11 a month billed monthly or $9 billed quarterly), unless you send through Salesforge, which includes Warmforge. On yearly billing the slot cost drops by a sixth.

Primeforge vs Outreach2day

At every size in the table, the full setup costs less with Outreach2day: $150 against $475 at 2,500 cold emails a day. Differences to know: Primeforge sells Google Workspace and Microsoft 365 mailboxes on US IP addresses; ours are SMTP/IMAP. Other mailbox providers, scored and priced as a full setup: best cold email infrastructure in 2026.

The Primeforge review covers Super Admin access, pre-warmed mailboxes and the Forge terms. Other Google and Microsoft sellers are compared in Cheap Inboxes alternatives (the vendor itself in the Cheap Inboxes review), and Primeforge alternatives prices seven of them at 100 mailboxes. Outreach2day vs Primeforge puts both side by side at 2,500, 5,000 and 25,000 cold emails a day.

FAQ

How much does Primeforge cost per mailbox?

$4.50 a month per slot on monthly billing for up to 110 slots, falling by $0.10 per 100 extra slots to $3.50 above 1,000 add-on slots. Yearly billing is $45 per slot a year ($3.75 a month), down to $35.

Does Primeforge include warmup?

No. Warmup is Warmforge, a separate product. Warmforge's page lists $12 per slot a month on monthly billing and $10 on quarterly billing for up to 10 slots, less at higher volumes, and says Salesforge users get unlimited Warmforge slots.

Is there a free trial?

No. Primeforge says you need to buy domains and mailboxes to use it, so it does not offer a free trial. There is no contract, and you can cancel any time.

What is the difference between Primeforge and Infraforge?

Both are Forge products with the same slot model. Primeforge sells Google Workspace and Microsoft 365 mailboxes at $4.50 to $3.50 a month, with monthly billing. Infraforge sells private SMTP mailboxes on dedicated servers at $4 to $3 a month, billed quarterly or yearly. See Infraforge pricing.

Sources

Checked September 28, 2026:

• Primeforge pricing: slot prices, calculator tiers, minimum, domains, trial, mailbox types.

• Primeforge home page: tenants, pre-warmed mailboxes, sending tools, own domains.

• Warmforge pricing: warmup slots and placement tests.