Infraforge vs Mailforge
An independent, review-free comparison compiled by the SaaSTracker editorial team. Both products are profiled in full, and neither can pay for placement here.
The short answer
Both sides assessedInfraforge compared with Mailforge
Siblings that are explicitly positioned against each other. Mailforge is shared infrastructure at about $2 a slot; Infraforge is private infrastructure with dedicated IPs at about $4 a slot plus roughly $99 an address. Mailforge is the right buy for cost-led estates and for senders whose complaint volume is high enough that a shared pool is a feature rather than a risk. Infraforge is for operators who want reputation attributable to their own sending and are running enough mailboxes to amortize an IP.
Mailforge compared with Infraforge
Siblings in the same stack, positioned against each other on purpose. Mailforge is shared infrastructure at about $2 a slot, which is the cheaper option and the one Salesforge itself recommends when complaint volume is high enough that a shared pool absorbs damage. Infraforge is private infrastructure with dedicated IPs at about $4 a slot plus roughly $99 an address, which isolates reputation completely and only pays off once the estate is large enough to amortize the IP.
Choose Infraforge if
Agencies and high-volume senders that want reputation isolated on dedicated IPs rather than shared pools, are comfortable sending from private infrastructure instead of provider accounts, and want to provision and manage the estate programmatically through an API, a CLI, or an AI assistant.
Choose Mailforge if
Small businesses and agencies that have chosen a sending platform and now need ten to a few hundred secondary mailboxes on properly configured domains, without spending a weekend in a registrar's DNS panel or risking their primary company domain.
Side by side
13 attributes| Attribute | Infraforge | Mailforge |
|---|---|---|
| Category | Infrastructure | Infrastructure |
| Starting price | About $4 per mailbox slot per month on annual billing, with a ten-slot minimum | $3 per mailbox slot per month billed yearly, ten-slot minimum, so about $30 per month (free trial) |
| Pricing model | Component-based: domains billed annually, mailbox slots billed monthly with a minimum, dedicated IP addresses billed monthly, and SSL, domain masking, and the Masterbox unified inbox as separate add-ons. | Slot-based subscription for mailbox capacity, billed monthly or annually with a ten-slot minimum, plus separate per-year domain registration and an optional per-domain SSL add-on. |
| Free plan | No | No |
| Free trial | No | None; this is provisioned infrastructure with real domain and hosting costs behind it |
| Best for | Agencies and high-volume senders that want reputation isolated on dedicated IPs rather than shared pools, are comfortable sending from private infrastructure instead of provider accounts, and want to provision and manage the estate programmatically through an API, a CLI, or an AI assistant. | Small businesses and agencies that have chosen a sending platform and now need ten to a few hundred secondary mailboxes on properly configured domains, without spending a weekend in a registrar's DNS panel or risking their primary company domain. |
| Setup time | Around five minutes to a working setup, with pre-warmed domains and mailboxes available to skip the aging period. Full volume still waits on warmup and ramping, so plan two to three weeks for a new estate. | Minutes to buy and provision, but plan for two to three weeks before meaningful volume. Domains register and DNS propagates quickly, mailbox creation is bulk and fast, and then warm-up and ramp-up set the real timeline. |
| Learning curve | Moderate. The tooling is good but the decisions are real: which Forge product you actually need, how many mailboxes sit behind each dedicated IP, and how fast to ramp when there is no shared pool to absorb a mistake. The API and CLI reward technical teams and offer little to buyers who wanted somebody else to handle this. | Low for the tool, moderate for the discipline. The interface is a calculator and a provisioning screen. What is hard is knowing how many mailboxes per domain to run, what daily caps to hold, and when to retire a mailbox, and Mailforge helps with the first of those and not the others. |
| Platforms | Web app, REST API, Command line interface, MCP server, Private mail infrastructure with dedicated IPs | Web app, Bulk domain and mailbox provisioning console |
| Compliance | SPF, DKIM, DMARC, and custom tracking domains configured automatically on every domain, SSL and domain masking available per domain for tracked links, CAN-SPAM and GDPR sender obligations remain entirely the customer's, since Infraforge supplies infrastructure and never touches campaign content | SPF, DKIM, and DMARC configured automatically on every provisioned domain, Sender obligations under CAN-SPAM and GDPR remain entirely with you as the sender, since Mailforge supplies infrastructure and never touches your campaign content |
| Founded | 2022 | 2022 |
| Headquarters | Tallinn, Estonia | Tallinn, Estonia |
| Ownership | Founder-led, largely bootstrapped with a small early round | Founder-led, largely bootstrapped with a small early round |
Strengths and limitations
Infraforge
Strengths
- Dedicated IP addresses, so sending reputation is isolated from other customers rather than shared.
- Provisioning in around five minutes, at the fast end of the entire category.
- An API, a CLI, and an MCP server, which makes the infrastructure genuinely operable by code or by an AI assistant.
- Bulk DNS updates across an entire domain pool, which is what keeps a fifty-domain estate maintainable.
Limitations
- Not provider accounts, so there is no Google or Microsoft provenance behind the mailboxes and no provider-to-provider delivery advantage.
- The dedicated IP at about $99 a month makes small estates expensive per mailbox, and there is a ten-slot minimum on top.
- Quarterly billing costs roughly twice as much per slot as annual, which pushes buyers toward a year of commitment in a volatile category.
- Component pricing across slots, domains, IPs, SSL, masking, and Masterbox makes fully loaded cost harder to compare than a single per-mailbox number.
Mailforge
Strengths
- Removes the single most tedious and error-prone part of running cold email, which is provisioning domains and writing SPF, DKIM, and DMARC records correctly at scale.
- Slot-based pricing means deleting and recreating burned mailboxes costs nothing, which matches how outbound programs actually behave.
- At about $3 a mailbox per month on annual billing, it is at the cheap end of the infrastructure market.
- The sizing calculator is genuinely useful and steers new buyers away from stacking too many mailboxes on one domain.
Limitations
- It is not a sending platform, so it is always a second purchase alongside a sequencer, which some buyers do not realize until after checkout.
- Shared infrastructure means you do not control the sending behavior of other customers on the same platform, which is precisely why the vendor also sells Primeforge and Infraforge.
- No warm-up included, so a fresh Mailforge setup is not ready to send at volume on day one and needs another subscription.
- Ten-slot minimum excludes small users who just want two or three extra mailboxes.
Pricing compared
Infraforge
Component-based: domains billed annually, mailbox slots billed monthly with a minimum, dedicated IP addresses billed monthly, and SSL, domain masking, and the Masterbox unified inbox as separate add-ons.
- Mailbox slotsAbout $4
- DomainsAbout $14
- Dedicated IP addressesAbout $99
- Add-ons$6
Infraforge is priced for scale and looks bad below it. Ten slots at $4 plus one dedicated IP at $99 is roughly $139 a month for ten mailboxes, which is far worse than InboxKit or Mailforge for a small estate. Run two hundred mailboxes behind that same address and the arithmetic inverts: about $800 in slots plus $99 in IP against $500 to $700 for provider accounts that still share nothing with you in the way of reputation control. The honest framing is that you are buying isolation and programmability, and both only pay for themselves when the estate is large enough for shared-pool reputation risk to be a real operating cost.
Mailforge
Slot-based subscription for mailbox capacity, billed monthly or annually with a ten-slot minimum, plus separate per-year domain registration and an optional per-domain SSL add-on.
- Mailbox slots, annual billing$3
- Mailbox slots, monthly billing$5
- Domain registration$14
- SSL and domain masking add-on$2
At $3 a slot annually, Mailforge is among the cheapest ways to get authenticated mailboxes at scale. Model it properly: sending 10,000 emails a month at a conservative 30 a day per mailbox needs roughly eleven to fifteen mailboxes, so about $45 a month of slots plus two or three domains, which is genuinely cheap next to the sequencer bill. At 100,000 a month you need on the order of 110 to 150 mailboxes, about $330 to $450 a month of slots plus twenty to thirty domains, and at that point the shared-infrastructure question becomes the real decision rather than the price. Compare that against Primeforge at $4.50 a slot for genuine Workspace and Microsoft 365 mailboxes and the premium for real provider mailboxes is only about 50 percent, which is a smaller gap than most buyers assume.
Editorial verdict on each
Infraforge
Infraforge is the private infrastructure option for operators who have concluded that shared IP pools are a risk they can no longer accept. Dedicated addresses, five-minute provisioning, bulk DNS across a whole domain pool, and an API, CLI, and MCP server make it one of the very few products in this category that a technical team can genuinely run as code. The economics are the whole decision. A dedicated IP at about $99 a month plus a ten-slot minimum makes small estates poor value, and the arithmetic only turns favorable somewhere north of a hundred mailboxes behind each address. Be equally clear about the architecture: these are not Google or Microsoft accounts, so if provider provenance is what your recipient base responds to, Primeforge in the same stack is the correct sibling to buy. Choose Infraforge when isolation and automation are the constraints, not when price is.
Read the full Infraforge profileMailforge
InnovationMailforge does one unglamorous job well: it turns the multi-hour ritual of registering domains and hand-writing SPF, DKIM, and DMARC records into a calculator and a checkout, at about $3 a mailbox per month. If you have already picked a sending platform and need ten to a few hundred secondary mailboxes without touching your company domain, it is among the cheapest and least annoying ways to get them, and slot-based billing correctly rewards retiring burned mailboxes. Two things should govern the decision. First, this is infrastructure, not a sequencer, and it is always a second bill. Second, it is the shared tier of a ladder whose upper rungs exist for a reason: if inbox placement is your binding constraint rather than cost per mailbox, the extra $1.50 a slot for real Workspace mailboxes from Primeforge is usually the better buy.
Read the full Mailforge profileInfraforge profile last reviewed 2026-09-01; Mailforge last reviewed 2026-08-22. Pricing is compiled from public sources and can change without notice. See our methodology.