Infraforge Pricing 2026: $4 a Mailbox, Real Cost at Scale

Infraforge charges $4 per mailbox slot a month on quarterly billing, falling to $3 above 1,000 add-on slots, or about $3.33 a month on yearly billing. The minimum is 10 slots. Warmup and sending are not in the price: they are separate Forge products (Warmforge and Salesforge) or another tool. Domains are $14 a year, and dedicated IPs beyond the included setup are $99 each a month, billed quarterly.

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

Infraforge Plans and Prices

Infraforge sells one product, private SMTP mailboxes on dedicated servers, priced per slot. There is no monthly billing option on the pricing page: you pay quarterly or yearly.

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. You pay for every slot you buy, used or empty: "If you purchase 10 slots but only create 5 mailboxes, you are still charged for all 10 slots." Yearly billing gives "2 months free" on mailboxes; there is no discount on domains.

What the Slot Price Includes

• Private SMTP mailboxes on dedicated servers and IPs. Infraforge does not sell Google Workspace or Microsoft 365; those are Primeforge, a separate Forge product.

• Automated DNS setup (SPF, DKIM, DMARC).

• Inbox hosting and maintenance, and support.

• Access to the Infraforge API.

Not included: warmup, a sequencer and placement tests. The pricing FAQ also says each Forge product is a separate subscription: "At the moment, you will need to subscribe to each product you want to use separately."

Costs on Top of the Slot Price

There is no free trial. You can cancel any time; the pricing page does not state a refund policy.

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

Monthly cost on quarterly 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. Infraforge is counted at 30 cold emails a mailbox a day, Outreach2day at 25, because Instantly includes warmup in the plan. Domains are left out.

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.

Infraforge vs Outreach2day

At every size in the table, the full setup costs less with Outreach2day: $150 against $433 at 2,500 cold emails a day. Differences to know: Infraforge sells dedicated IPs and a white-label reseller program; our mailboxes are SMTP/IMAP mailboxes on your domains, with warmup and a sequencer included. Other providers, scored and priced as a full setup: the best cold email infrastructure providers.

Infraforge and its shared-IP sibling are side by side in Mailforge vs Infraforge with the cost of each. Other SMTP vendors, some with dedicated IPs, are in Inframail alternatives and Mailpool alternatives. The Infraforge review prices 50, 100 and 500 mailboxes with a sequencer, and Infraforge alternatives puts seven other vendors next to it at 100 mailboxes.

FAQ

How much does Infraforge cost per mailbox?

$4 a month per slot on quarterly billing for up to 110 slots, falling by $0.10 a month per 100 extra slots to $3 above 1,000 add-on slots. Yearly billing is $40 per slot a year (about $3.33 a month), down to $30.

Does Infraforge 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 or monthly billing?

No. Infraforge says it has no free trial because you have to buy domains and mailboxes to use it, though you can explore the app after signing up. The pricing page offers quarterly and yearly billing only. There is no contract, and you can cancel any time.

How much are Infraforge domains?

$14 a year for a .com. You get full DNS control, "the same as if you had purchased from another registrar."

Sources

Checked September 28, 2026:

• Infraforge pricing: slot prices, calculator tiers, add-ons, domains, trial.

• Infraforge home page: mailbox type, sending tools.

• Warmforge pricing: warmup slots and placement tests.