Infraforge
Dedicated IP sending infrastructure with isolated domain reputation.
From $4/mailbox/mo API
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Bottom line
Private cold-email infrastructure from $4 per mailbox per month, billed yearly, with a 10-slot minimum and a REST API.
Stands out for: Dedicated servers plus a public REST API at api.infraforge.ai for domains, mailboxes, and sequencer export.
Watch out for: Minimum 10 slots. Extra IPs are $99 per month billed quarterly. No free trial. Separate from Mailforge.
Overview
Infraforge is private, dedicated email infrastructure for cold outreach, from the Forge stack. Mailbox slots are $4 per month billed yearly, with a 10-slot minimum. On the calculator, 25 slots cost $83 per month yearly versus $100 per month billed quarterly..com domains are $14 per year. Extra IP addresses are $99 per month billed quarterly. Masterbox is $7 per workspace per month billed annually, or $9 billed quarterly. SSL and domain masking is $2 per domain per month quarterly, or $6 per domain per year.
Teams pick Infraforge when they want isolated servers instead of Mailforge's shared pool. The vendor says Mailforge is better if you expect spam reports, and Infraforge is better if you follow deliverability rules. REST API access is included, with a public base URL at api.infraforge.ai. There is no free trial. Each Forge product is a separate subscription. Unused mailbox slots still bill.
Who it's for
Best for
- Agencies that want private IPs they control
- Teams automating mailbox setup through the API
- Senders who follow strict deliverability rules
- Shops mixing Forge products for ESP diversity
Not ideal for
- Buyers who need fewer than 10 mailboxes
- Teams that expect a high spam-complaint volume
Key features
SMTP relay. SMTP mailbox and relay infrastructure for high-volume outbound email.
Setup. More setup required than turnkey resellers.
Product family. Same product family as Mailforge.
Pricing
| Plan | Price | What you get |
|---|---|---|
| Mailbox slot, billed yearly | $4/slot/mo | 10-slot minimum |
| 25 slots | $83/mo | Billed yearly, $100/mo billed quarterly |
| Extra IPs | $99/mo | Billed quarterly |
| Masterbox | $7/workspace/mo | Annual billing, $9 quarterly |
| Domain | $14/year | SSL and masking $2 per domain a month |
Mailbox slots $4/month billed yearly, 10-slot minimum. 25 slots are $83/month yearly vs $100/month quarterly. Extra IPs $99/month billed quarterly. Masterbox $7/workspace/month annual or $9 quarterly..com domains $14/year. SSL/masking $2/domain/month quarterly or $6/domain/year. API included. No free trial. Confirm current terms on the vendor site.
Checked 19 Sep 2026. Vendors change prices without notice.
Is Infraforge expensive?
Infraforge starts at $4/mailbox/mo. We list 36 deliverability tools in total. 4 have a free tier, and those with a public price typically start around $10 a month.
- 1 quote-based
- 4 free tier
- 35 public price
Worked out automatically from every deliverability listing, so it updates as the directory changes.
Pros and cons
Pros
- $4/mailbox/mo on yearly billing
- REST API included
- Dedicated private servers
Cons
- 10 mailbox slot minimum
- Extra IPs $99/mo quarterly
- No free trial
Integrations
Salesforge
What's new at Infraforge
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How Infraforge compares
See all Infraforge alternatives, with what each one does differently and a head to head for every pairing.
| Tool | Free tier | From | MCP | API | Compare |
|---|---|---|---|---|---|
| | – | $4/mailbox/mo | – | ✓ | |
| | – | $3/mailbox/mo | – | – | Compare |
| | – | $75/mo | ✓ | ✓ | Compare |
| | – | $240/mo | – | ✓ | Compare |
| | – | $4.50/mailbox/mo | – | ✓ | Compare |
$3/mailbox/mo
Cheaper shared-IP sibling from $3 per slot.
$75/mo MCP API
SMTP rotating IPs from $75/mo without a slot minimum of 10.
$240/mo API
Dedicated server with unlimited inboxes on a flat $240/mo.
$4.50/mailbox/mo API
Google and Microsoft mailboxes if you want ESP matching.
Your next step
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