Is the dedicated IP included in the per-mailbox price?

No. The dedicated IP is a $99/mo add-on on top of per-mailbox pricing. Without it, you are essentially on shared infrastructure (which is Mailforge).

Should I use Mailforge or Infraforge?

Start with Mailforge ($2-$3/mailbox, shared IPs) if budget is priority. Upgrade to Infraforge when you need dedicated IPs for sender isolation. Or skip both and use InboxKit for better value.

Does Infraforge work with SendKit?

Yes. Connect Infraforge mailboxes to SendKit for AI warmup, campaign sequences, and deliverability monitoring.

Infraforge Pricing: True Cost Revealed

Q: Is Infraforge cheaper than InboxKit?

No. At 100 mailboxes, Infraforge costs roughly $489/mo. InboxKit costs $250/mo with Google Workspace, US IPs, warmup, verification, and monitoring included. InboxKit is nearly half the price.

Full breakdown of Infraforge pricing including dedicated IP costs, domain masking fees, and total cost at scale vs InboxKit and Mailforge.

2 min readUpdated Mar 2026

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Bottom line

Infraforge charges $3 to $4 per SMTP mailbox plus $99/mo for dedicated IPs and $2/domain/mo for SSL/domain masking. At 100 mailboxes across 20 domains, total cost is roughly $489/mo. InboxKit offers Google Workspace with dedicated IPs and deliverability tools at $250/mo for the same 100 mailboxes.

Infraforge is nearly double the cost for less.

Infraforge Plans

Plan	Price	What you get	Watch out for
Dedicated IP Mailboxes per mailbox, dedicated IPs	$3-$4/mailbox/mo	SMTP mailboxes on dedicated IP infrastructure Pre-warmed domains Multi IP provisioning Masterbox for centralized management API access Automated DNS setup	Dedicated IP costs $99/mo extra SMTP only, no Google Workspace or Microsoft 365 No built-in warmup tool (pre-warmed domains only) No inbox placement testing or verification
Dedicated IP Add-on monthly	$99/mo	Dedicated IP address(es) Full sender reputation isolation No shared IP risk	Required for dedicated IP functionality Adds to per-mailbox costs significantly
SSL and Domain Masking per domain	$2/domain/mo	SSL certificate for domain Domain masking	Additional cost per domain Adds up with many domains

What's Not Included

Dedicated IP is an add-on, not included

The per-mailbox rate ($3-$4/mo) does not include the dedicated IP. You need to add $99/mo for dedicated IP infrastructure. Without this add-on, you would be on shared IPs (which is essentially Mailforge).

$99/mo

Domain masking costs extra

SSL and domain masking costs $2 per domain per month. At 20 domains, that is $40/mo. At 50 domains, $100/mo. This is on top of mailbox and IP costs.

$2/domain/mo ($40-$100/mo typical)

No warmup or monitoring tools

Infraforge provides pre-warmed domains but no ongoing warmup tool, inbox placement testing, or verification. Use SendKit or another sending tool for these capabilities.

$0 with SendKit

All-inclusive from $99/mo

Dedicated IPs, warmup, validation, inbox testing, blacklist monitoring. No add-ons.

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Infraforge vs SendKit

	Infraforge
Price per Mailbox	$3-$4/mo
Dedicated IP Cost	$99/mo extra
Domain Masking	$2/domain/mo
Google Workspace	No
Microsoft 365	No
Built-in Warmup	Pre-warmed domains only
Inbox Placement Testing	No
Email Verifier	No
Blacklist Checker	No
Cost for 100 Mailboxes (20 domains)	~$489/mo
Multi IP Provisioning	Yes

Total cost at different scales

30 mailboxes

Infrastructure cost only

Infraforge

$100/mo

SendKit

N/A (sending platform)

100 mailboxes

Add SendKit from $99/mo for sending

Infraforge

$332/mo

SendKit

N/A

300 mailboxes

Volume discount may apply

Infraforge

$900/mo

SendKit

N/A

Real Total Cost

Infraforge pricing is layered: per-mailbox fees, dedicated IP add-on, and domain masking. Here is what a typical setup costs: 50 mailboxes across 10 domains: 50 x $3.50 (average) + $99 (dedicated IP) + 10 x $2 (masking) = $294/mo. 100 mailboxes across 20 domains: 100 x $3.50 + $99 + 20 x $2 = $489/mo.

200 mailboxes across 40 domains: 200 x $3.50 + $99 + 40 x $2 = $879/mo. Compare to InboxKit: 100 mailboxes = $250/mo with Google Workspace, US IPs, warmup, verification, and monitoring included. Infraforge costs nearly double for SMTP-only mailboxes.

Key takeaways

50 mailboxes (10 domains): ~$294/mo
100 mailboxes (20 domains): ~$489/mo
200 mailboxes (40 domains): ~$879/mo
InboxKit: $250/mo for 100 GWS mailboxes with all tools included

When Infraforge Is Worth It

Infraforge makes sense in two scenarios. First, if you are already in the Salesforge ecosystem and want a natural upgrade from Mailforge shared IPs to dedicated IPs. The migration path is smooth.

Second, if you specifically need SMTP with multi IP provisioning for granular campaign isolation. Infraforge lets you allocate different IPs to different campaigns or clients, which is useful for agencies running multiple outreach programs. For most other teams, InboxKit provides better value: Google Workspace mailboxes with dedicated IPs and deliverability tools at roughly half the price of Infraforge.

Key takeaways

Worth it for Salesforge ecosystem users upgrading from Mailforge
Worth it for agencies needing multi IP provisioning
InboxKit is better value for most other use cases

All-inclusive from $99/mo

Dedicated IPs, warmup, validation, inbox testing, blacklist monitoring. No add-ons.

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Keep reading

Sources

infraforgeG2 Website

sendkitG2 Website

frequently asked questions

Got questions? We've got answers.

Infraforge charges $3 to $4 per SMTP mailbox plus $99/mo for dedicated IPs and $2/domain/mo for SSL/domain masking. At 100 mailboxes across 20 domains, total cost is roughly $489/mo.

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