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

Pick Mailreef if

• Fits if you send more than 20,000 cold emails a month and want your own server
• Works for agencies that already run Smartlead or Instantly

Look elsewhere if

• Not for you if you send a few hundred emails a month, as the plan starts at $240
• Pricey if you can't commit for 12 months: month to month is $249
• Skip it if you want to try before paying, since both plans go through a demo
• Watch out: $0.001 a send is added to the monthly price
• Too light on its own, because campaigns are sent from a separate tool

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

Mailreef

• A per-send fee of $0.001 is added to the monthly price, which is $1 for every 1,000 emails.
• The cheaper Agency price needs a 12-month commitment; month-to-month costs $249.
• Both priced plans are booked through a demo, and no free plan or trial is listed.
• It supplies mailboxes only: campaigns are sent from a separate tool.

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.

Mailreef

Dedicated server and IP

Each plan includes a dedicated mail server and IP address, with 150 or more mailboxes per server and no shared resources.

One-click domains and mailboxes

Domains can be bought and mailboxes created in one click, or you can bring your own domain. SPF, DKIM and DMARC records are created automatically.

Pre-warmed setup

The comparison table lists a pre-warmed server, domains and mailboxes so campaigns can start on the first day.

Monitoring and screening

Server and mailbox monitoring is included, and the vendor says it screens new accounts for spammers.

API and sender integrations

Developer API access is included, along with integrations for Smartlead and Instantly.

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.

Mailreef

• Agency$240

  per month on a 12-month commitment, plus $0.001 per send

  A dedicated server and IP with 150+ mailboxes per server. Bought through a demo booking.

• Agency Flex$249

  per month, month-to-month, plus $0.001 per send

  The same server setup without a commitment, cancelable at any time. Bought through a demo booking.

• EnterpriseCustom

  Custom infrastructure with special pricing, available by requesting a quote.

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.

Mailreef

No public discounts listed.

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.