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InboxKit vs Mailforge: Real Differences
We compared InboxKit and Mailforge on pricing, mailbox types, IP infrastructure, and deliverability tools for cold email infrastructure setup.
The Verdict
InboxKit offers Google Workspace and Microsoft 365 mailboxes with a full deliverability stack for $2.50 per mailbox. Mailforge offers SMTP mailboxes on shared IPs for $2 to $3 per mailbox. The $0.50 savings on Mailforge comes at the cost of shared infrastructure, no deliverability tools, and SMTP-only mailboxes.
InboxKit is the better investment for teams that care about inbox placement.
InboxKit vs Mailforge
| Feature | InboxKit | Mailforge |
|---|---|---|
| Pricing | ||
| Price per Mailbox | $2.50/mo Flat rate for Google Workspace, Microsoft 365, and Azure | $2-$3/mo SMTP shared IP mailboxes |
| Cost for 200 Mailboxes | $500/mo 200 x $2.50 with deliverability tools included | ~$484/mo Approximately $484/mo for 200 mailboxes |
| Infrastructure | ||
| Mailbox Types | GWS + M365 + Azure Multiple provider options | SMTP only Shared IP SMTP mailboxes only |
| IP Infrastructure | US IPs US-based IPs across all mailbox types | Shared IPs Shared IP pools across all mailboxes |
| DNS Automation | Full auto SPF, DKIM, DMARC, MX all automated | Yes + bulk updates Automated DNS plus bulk DNS update tools |
| Deliverability | ||
| Built-in Warmup | Yes Warmup built into the platform | No Must use external warmup |
| Inbox Placement Testing | Yes Built-in placement testing | No Not available |
| Features | ||
| Domain Masking | Not specified Not mentioned on the website | Yes SSL and domain masking available |
| Multiple Workspaces | Dedicated panel per domain Each domain gets its own panel | Yes Support for multiple workspaces |
| Bulk Domain Transferring | Not specified Not mentioned | Yes Domain transferring supported |
Protect your mailbox investment with dedicated IPs, AI warmup, and auto mailbox protection. Increase mailbox longevity.
Infrastructure Quality
InboxKit provides Google Workspace, Microsoft 365, and Azure mailboxes with US-based IPs. These are real provider mailboxes that carry the sending reputation of established email platforms. Mailforge provides SMTP mailboxes on shared IP infrastructure.
The distinction matters for cold email. Google Workspace and Microsoft 365 mailboxes inherit trust signals from the provider ecosystem. SMTP mailboxes on shared IPs rely entirely on the IP reputation, which is shared with other senders.
If another Mailforge user on your IP pool triggers spam complaints, your deliverability can suffer.
Key takeaways
- InboxKit: GWS, M365, Azure mailboxes with US IPs
- Mailforge: SMTP on shared IP pools
- Google Workspace mailboxes carry inherent trust signals
- Shared IPs mean your reputation depends on other senders
Pricing Comparison
At face value, Mailforge is slightly cheaper. 200 mailboxes cost roughly $484 on Mailforge versus $500 on InboxKit. That is a $16 per month difference.
But InboxKit includes warmup, inbox placement testing, email verification, and blacklist monitoring. If you need those tools from another provider when using Mailforge, the real cost gap favors InboxKit. Mailforge advertises 71% savings versus Google Workspace ($484 vs $1,680 for 200 mailboxes).
InboxKit offers Google Workspace mailboxes at $500 for 200, which is also far cheaper than buying Google Workspace directly.
Key takeaways
- 200 mailboxes: InboxKit $500/mo vs Mailforge ~$484/mo
- InboxKit includes deliverability tools; Mailforge does not
- Both are far cheaper than direct Google Workspace ($1,680 for 200)
Which One Should You Choose
Choose InboxKit if you want Google Workspace or Microsoft 365 mailboxes with built-in deliverability tools. The $2.50 per mailbox rate with warmup, verification, and monitoring included is strong value. Choose Mailforge if you are comfortable with SMTP on shared IPs and want to keep per-mailbox costs as low as possible.
Mailforge also makes sense if you are already in the Salesforge ecosystem. Pair it with SendKit for warmup and deliverability monitoring. For teams that want SMTP with dedicated IPs, consider Infraforge instead of Mailforge.
Key takeaways
- InboxKit: best for GWS/M365 with built-in deliverability tools
- Mailforge: best for budget SMTP, good for Salesforge ecosystem users
- Infraforge is the dedicated-IP alternative to Mailforge
Pros & Cons
InboxKit
Strengths
- Google Workspace + Microsoft 365 + Azure mailboxes
- Built-in warmup, placement testing, verifier, blacklist checker
- US-based IPs with 95% claimed inbox placement rate
- Full DNS automation
- 15+ integrations including SendKit
Limitations
- Slightly higher per-mailbox cost ($2.50 vs $2.00)
- No domain masking feature mentioned
- No bulk domain transferring mentioned
Mailforge
Strengths
- Slightly lower per-mailbox cost at $2-$3/mo
- SSL and domain masking included
- Bulk DNS updates and domain transferring
- 10,000+ businesses using the platform
- Part of the Salesforge ecosystem
Limitations
- Shared IP infrastructure only
- SMTP only, no Google Workspace or Microsoft 365
- No warmup, verification, or placement testing
- Deliverability depends on shared IP pool behavior
Protect your mailbox investment with dedicated IPs, AI warmup, and auto mailbox protection. Increase mailbox longevity.
Got questions? We've got answers.
InboxKit offers more mailbox types, built-in deliverability tools, and US-based IPs for $2.50 per mailbox. Mailforge is cheaper at $2-$3 per SMTP mailbox but uses shared IPs with no deliverability tools. InboxKit is the better choice for inbox placement quality.
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