ReplyDak vs Mailforge (and Primeforge): which to choose

Three Salesforge products, three different things

Salesforge sells cold-email infrastructure under three names, and people often compare the wrong one. The mailbox type decides which servers your mail leaves from, so start there:

Salesforge says annual billing on Mailforge and Primeforge gives two months free. Mailforge also charges $2 per domain per month for SSL and domain masking. Prices were read from mailforge.ai, primeforge.ai and infraforge.ai on 16 October 2026.

Monthly cost at common sizes

Monthly billing, mailboxes only. At 10 mailboxes Mailforge is $5 cheaper; from 30 mailboxes up ReplyDak costs less than both, because its per-mailbox price falls with volume while Salesforge's slot price is flat. Use the cost calculator for your own numbers, including domains.

Google seats vs shared infrastructure: what changes

• Sending servers. A Google Workspace mailbox sends through Google's mail servers. A Mailforge mailbox sends through Salesforge's servers and shared IP pool. Mailbox providers judge both on domain reputation, authentication and recipient behaviour, but the server and IP history differ.
• Shared reputation. On a shared IP pool, other senders' behaviour can affect the IPs your mail uses. Providers manage this, but you do not control it. Infraforge's dedicated IPs exist for teams that want that control.
• Audience match. If most of your prospects use Google Workspace or Microsoft 365, many teams prefer to send from the same kind of mailbox. If you sell to a mix, a cheaper stack may be fine. Test with your own list.
• Cost at scale. Own-infrastructure products are usually cheaper per mailbox at high volume. Mailforge's flat $3 is not the cheapest of that type, though; Maildoso goes down to $0.49 at 1,000.

Feature comparison

Which should you choose?

• Choose ReplyDak if you want Google Workspace mailboxes, warmup included, and a lower price than Primeforge from 10 mailboxes up, or if you need INR billing.
• Choose Primeforge if you need Microsoft 365 today or already run Salesforge and want everything in one account.
• Choose Mailforge if you want the cheapest option at 10 mailboxes and are comfortable sending from shared, non-Google infrastructure.
• Choose Infraforge if you want dedicated IPs you control and have the volume to justify $99 per IP.

Annual billing changes the maths

Salesforge advertises two months free on annual plans. Applied to the list prices, that brings Primeforge to about $3.75 per slot and Mailforge to about $2.50 per slot (Mailforge's own calculator example implies $2.40, so confirm before paying). ReplyDak bills monthly only. If you can prepay a year, Mailforge undercuts ReplyDak at every size; Primeforge on annual billing (about $3.75) still costs more than ReplyDak's monthly price at every size.

Test before you commit

Whichever you lean towards, start with 10 mailboxes, warm them for about three weeks, then send a real campaign to a few hundred prospects and compare replies, not opens. If you try both a Google Workspace stack and a shared-infrastructure stack, send the same copy to similar segments so the comparison is fair. The deliverability checklist lists what to check if results differ.

Salesforge, Mailforge, Primeforge, Infraforge, Warmforge, Google Workspace and Microsoft 365 are trademarks of their respective owners. ReplyDak is not affiliated with Salesforge.