Line by line
| Feature | Inboxkit | Mailforge |
|---|---|---|
| Mailboxes | Official, paid Google Workspace and Microsoft 365, plus Azure | Its own infrastructure on a shared IP pool; no Google or Microsoft |
| Claude Code / Codex (MCP) | Remote MCP server, connects to Claude Code and Codex | MCP server listed, with an API and CLI |
| Monthly price | $3 a mailbox | $3 a slot, falling with volume to $2 above 1,000 add-on slots |
| Annual price | $2.50 a mailbox a month | $2.50 a slot a month at list, lower at volume |
| Minimum | No plans, no minimums | 10 slots, charged whether or not mailboxes are created |
| Microsoft volume | Azure: $30 a tenant for up to 100 mailboxes | No Microsoft 365 mailboxes sold |
| Domain extras | Domain rotation, domain warmup and email migration built in | SSL and domain masking, $2 a domain a month |
| API | Full REST API with webhooks on every account, 119 endpoints | API and CLI listed |
| Warmup (add-on) | 14 days on an isolated network, $3 a mailbox | Sold separately through Warmforge; free with the group’s own sequencer |
| Monitoring (add-on) | InfraGuard: blacklists, DNS, bounces and placement every six hours, with auto-pause | Blacklist and DNS health checks sit in Warmforge |
Competitor details from public pages, checked 19 Oct 2026. Sources: Mailforge pricing (mailforge.ai); Mailforge homepage (mailforge.ai); Warmforge pricing (warmforge.ai); Inboxkit pricing.
Competitor offers can change after that date. Trademarks belong to their owners.
Prices at common volumes
| Mailboxes | Inboxkit, monthly | Inboxkit, annual | Mailforge |
|---|---|---|---|
| 100mailboxesMailboxes only | Inboxkit, monthly$300 | Inboxkit, annual$250 | Mailforge$300, or $250 a month on annual |
| 500mailboxesMailboxes only | Inboxkit, monthly$1,500 | Inboxkit, annual$1,250 | Mailforge$1,304, or $1,086.67 a month on annual |
| 1,000mailboxesMailboxes only | Inboxkit, monthly$3,000 | Inboxkit, annual$2,500 | Mailforge$2,109, or $1,757.50 a month on annual |
| 20mailboxesWith warmup add-ons: ours $3, Warmforge $11 a slot | Inboxkit, monthly$120 | Inboxkit, annualn/a | Mailforge$280 |
Mailforge is cheaper from 111 mailboxes. Each of its slots is its own shared-IP mailbox.
Mailforge prices add-on slots by volume, from $3 down to $2 above 1,000. Warmforge slots are free with the group’s own sequencer.
Mailforge pricing against Inboxkit
Mailforge sells mailbox slots at $3 a month, with a minimum of 10. Add-on slots get $0.10 cheaper for every 100, down to $2 above 1,000. Annual billing gives 2 months free, which is $2.50 a slot a month at list.
Inboxkit charges $3 a mailbox on monthly billing, or $2.50 on annual, with no minimum. Google Workspace and Microsoft 365 cost the same.
Mailforge costs less from 111 mailboxes. At 1,000 it is $2,109 a month, or $1,757.50 on annual. Inboxkit is $3,000, or $2,500 on annual, at today’s published rate.
What a Mailforge mailbox is
Mailforge’s pricing page calls it distributed email infrastructure that uses a shared IP pool. It sells no Google Workspace or Microsoft 365 mailboxes, and it points buyers who want those to Primeforge.
Inboxkit sells official, paid Google Workspace and Microsoft 365 mailboxes at the same price. For Microsoft volume, one Azure tenant holds up to 100 mailboxes for $30 a month. Pre-warmed mailboxes are live in hours.
Mailforge setup, domains and minimums
Mailforge sells at least 10 slots, charged whether or not you create mailboxes. Its subscription includes automated DNS setup. SSL and domain masking cost $2 a domain a month, and .com domains cost $14 a year.
Inboxkit has no minimum. Orders complete in 30 to 120 minutes, with SPF, DKIM and DMARC configured for you. Domain rotation, domain warmup and email migration are built in.
Mailforge warmup and monitoring
Warmup is not part of the Mailforge subscription. It is sold per slot through Warmforge, at $11 a slot a month for 11 to 50 slots. Warmforge also holds the blacklist and DNS health checks.
Inboxkit’s warmup runs for 14 days on an isolated network, at $3 a mailbox. InfraGuard checks blacklists, DNS, bounces and inbox placement every six hours, with alerts and auto-pause. Both are add-ons, and InfraGuard’s first month is free.
With warmup, 20 mailboxes cost $280 a month on Mailforge and Warmforge, and $120 on Inboxkit. Users of the same group’s sequencer get Warmforge slots free.
Mailforge API, MCP and automation
Mailforge’s homepage lists an API, an MCP server and a CLI.
Every Inboxkit account gets the full REST API, with 119 endpoints and webhooks. Connect Claude Code or Codex to Inboxkit’s remote MCP server to run your mailbox work from an agent.
Mailforge support and sequencers
Mailforge includes customer support in its subscription. Inboxkit support runs 24/7 on Slack, in-app chat and email. Every account gets unlimited team members and workspaces.
Inboxkit mailboxes export in one click to 24+ sequencers, including Smartlead and Instantly.
Switch from Mailforge in four steps
Create a free account
Pay only for the mailboxes you add. No plan to pick first.
Buy or connect domains
Then add Google Workspace, Microsoft 365 or Azure mailboxes on them.
Export to your sequencer
One click to 24+ sequencers, including Smartlead and Instantly.
Run both side by side
Warm up here while Mailforge keeps sending. Move campaigns before your plan renews.
Questions about Mailforge
Is Mailforge cheaper than Inboxkit?
From 111 mailboxes, yes. At 1,000, Mailforge is $2,109 a month and Inboxkit $3,000. Each Mailforge slot is its own shared-IP mailbox. Inboxkit sells official, paid Google Workspace and Microsoft 365 mailboxes.
How does Mailforge pricing work?
You buy at least 10 slots at $3 a month. Add-on slots get $0.10 cheaper for every 100, down to $2 above 1,000. Annual billing gives 2 months free.
Does Mailforge sell Google Workspace or Microsoft 365?
No. Its pricing page says it uses a shared IP pool, and it points those buyers to Primeforge. Inboxkit sells both at $3. One Azure tenant holds up to 100 Microsoft mailboxes for $30 a month.
Does Mailforge include warmup?
Not in the subscription. Warmup is sold per slot through Warmforge, at $11 a slot for 11 to 50 slots. Inboxkit’s 14-day warmup is a $3 add-on.
Does Mailforge have an MCP server?
Its homepage lists an API, an MCP server and a CLI. Inboxkit includes the REST API and a remote MCP server on every account.
Is Mailforge legit?
Mailforge is a working provider with published prices and terms. Its mailboxes run on its own shared IP pool, and it sells no Google Workspace or Microsoft 365.
How do I move from Mailforge to Inboxkit?
Open a free account, buy or connect domains, and add mailboxes. Export them in one click to your sequencer. Keep Mailforge sending until your campaigns have moved.
Open a free account
$3 a mailbox, no minimum. Google Workspace, Microsoft 365 and Azure.
