Mailforge vs Mission Inbox (2026): which should you pick?

Pick Mailforge if

• Fits if you want cheap mailboxes for a sequencer you already pay for
• Works for small senders happy on shared IPs

Look elsewhere if

• Skip it if you want a tool that sends campaigns, as it doesn't
• Not for you if you want a trial, since there isn't one
• Watch out: slots are charged whether or not a mailbox is created
• Pricey if you add domains and masking: .com is $14 a year and masking is $2 per domain a month

Pick Mission Inbox if

• Fits if you want dedicated IPs for outbound and already own a sequencer
• Works for agencies that keep each client's sending apart

Look elsewhere if

• Not for you if you want to write or schedule campaigns, because there is no sequencer
• Tight if you send past 5,000 a month, since Lite pauses at the limit, counts warm-up emails and has no overage billing
• Skip it if you want a trial, as none is offered
• Pricey if you add warm-up, which is a paid add-on, or move to Scale at $199 a month

Mailforge

• Slots are billed whether or not a mailbox is created in them, and the minimum purchase is 10.
• Domains are bought separately; the calculator prices .com at $14 a year, charged once, with no annual discount on domains.
• There is no free trial; the app can be explored after sign-up, but domains and mailboxes must be purchased to send.
• Each Forge product is a separate subscription, and SSL and domain masking costs $2 per domain a month.

Mission Inbox

• It is infrastructure only: there is no sequencer, so you need another tool to write and schedule campaigns.
• Lite is a fixed plan with no overage billing; at 5,000 sends, counting warmup emails, you have to move to Scale.
• Premium Warmups are a paid add-on, and sends include warmup emails.
• Pricing is a monthly rate; the calculator shows prepaid-monthly (10% off) and annual (17% off) options.

Mailforge

Automated DNS setup

Each domain added gets DMARC, SPF, DKIM and custom domain tracking configured, with bulk DNS updates in the app.

Shared IP pool

Mailboxes are spread across a shared IP pool, in contrast with Infraforge's dedicated servers.

Pre-warmed domains and mailboxes

The page says domains and mailboxes can be bought pre-warmed so sequences can start right away.

Workspaces and domain transfers

Projects can have their own workspaces, and domains can be transferred in or out.

Works with any sending tool

Mailboxes connect to any sending software, including Salesforge from the same vendor.

SSL and domain masking

An add-on that redirects securely while masking the domain behind a branded website.

Mission Inbox

Dedicated IP addresses

Each mailbox sends from IP addresses reserved for the account instead of a shared pool, so other senders' habits do not affect its reputation.

MI Shield pre-send scan

The vendor's own AI checks content, headers and DNS before each outbound send to catch problems before a campaign goes live.

Automatic DNS and mailbox setup

Mailboxes are created in one step and DNS records are configured automatically, so they can be connected to a sequencer afterwards.

Cubes for separating clients

Cubes split clients, brands and campaign workloads into separate sending environments, which matters for agencies.

Premium warmup add-on

Mailbox warmup is a paid add-on, billed in credits per mailbox. You can instead warm up with your own tool or skip warmup.

API and SMTP access

An API and SMTP sending give campaign or product email traffic its own sending reputation, with documentation linked from the site.

Mailforge

• Mailbox slots$3

  per mailbox slot / month, billed monthly, 10-slot minimum

  Slots are the capacity to create mailboxes and are charged whether used or not. The calculator shows 25 slots at $75 a month, or $60 a month billed yearly.

Mission Inbox

• Lite$50

  per month for 15 mailboxes and 5,000 sends

  Dedicated IP addresses, MI Shield protection, analytics and sending logs. A fixed plan: it pauses at the send limit until you move to Scale.

• Scale$199

  per month for 30 mailboxes and 10,000 sends

  Aimed at agencies and companies sending for clients. Dedicated IPs, MI Shield, analytics and logs; more mailboxes and sends can be added.

Mailforge

• Annual discount

  Two months free on annual mailbox billing

  The FAQ says annual billing for mailboxes gets 2 months free automatically; there is no discount on domains.

Mission Inbox

• Annual discount

  17% off with annual billing

  The pricing page calculator lists an annual option at 17% off and a prepaid monthly option at 10% off, against pay-as-you-go monthly.