Mission Inbox
Deliverability management and inbox placement monitoring platform.
From $50/mo API
Visit Mission Inbox (opens in a new tab) Follow Mission Inbox updates
Bottom line
Dedicated-IP outbound email infrastructure. Lite is $50/mo for 15 mailboxes and 5,000 sends.
Stands out for: REST API, SDKs, SMTP, and webhooks sit beside mailbox plans, so developers can send without a sequencer UI.
Watch out for: Lite pauses on overage instead of billing extra. Scale overage is $3 per mailbox and $1 per thousand sends.
Overview
Mission Inbox is outbound and developer email infrastructure with dedicated IPs, mailboxes, SMTP, and a REST API. Lite is $50 per month for 15 mailboxes and 5,000 sends; overage pauses the account until you upgrade. Scale is $199 per month for 30 mailboxes and 10,000 sends, then $3 per extra mailbox and $1 per thousand extra sends. Pro is $99 per month for 5 domains and 100,000 sends, with extra domains at $2 and extra email at $1 per thousand. All three include dedicated IPs, MI Shield, and sending logs.
Developers pick Mission Inbox to send through API keys, SDKs in six languages, SMTP, and real-time webhooks without rebuilding a sequencer. You can keep your CRM or mailbox workflow and use Mission Inbox as the sending layer. There is no printed free trial. A free 30-minute deliverability consult is a sales call, not a product trial. Lite is the cheapest way in if 5,000 sends is enough.
Who it's for
Best for
- Teams that want a dedicated IP from $50/mo
- Developers sending over API or SMTP
- Agencies that will pay as they grow past 15 inboxes
- Senders who want MI Shield protection included
Not ideal for
- Buyers who need unlimited sends on Lite
- Teams that only want Google Workspace resale
Key features
Managed deliverability. Hands-on deliverability management and inbox placement monitoring.
Pricing
| Plan | Price | What you get |
|---|---|---|
| Lite | $50/mo | 15 mailboxes and 5,000 sends, overage pauses |
| Pro | $99/mo | 5 domains and 100,000 sends, extra domains $2, extra email $1 per thousand |
| Scale | $199/mo | 30 mailboxes and 10,000 sends, then $3 per mailbox and $1 per thousand sends |
Lite $50/month for 15 mailboxes and 5,000 sends (overage pauses). Scale $199/month for 30 mailboxes and 10,000 sends, then $3/mailbox and $1/thousand sends. Pro $99/month for 5 domains and 100,000 sends, extra domains $2, extra email $1/thousand. Dedicated IPs included. No free trial. Confirm current terms on the vendor site.
Checked 19 Sep 2026. Vendors change prices without notice.
Is Mission Inbox expensive?
Mission Inbox starts at $50/mo. We list 38 deliverability tools in total. 4 have a free tier, and those with a public price typically start around $10 a month.
- 1 quote-based
- 4 free tier
- 37 public price
Worked out automatically from every deliverability listing, so it updates as the directory changes.
Pros and cons
Pros
- Lite $50/mo with a dedicated IP
- REST API, SMTP, and webhooks
- Pay-as-you-go extras on Scale
Cons
- Lite pauses when you exceed 5,000 sends
- No published free trial
- Not a Google Workspace reseller
What's new at Mission Inbox
No updates logged yet. Follow Mission Inbox and we will email you when it announces something new or its starting price changes.
Follow Mission Inbox
Get an email when Mission Inbox ships a new feature, posts release notes or changes its starting price. Only when something changes, and you can stop in one click.
How Mission Inbox compares
See all Mission Inbox alternatives, with what each one does differently and a head to head for every pairing.
| Tool | Free tier | From | MCP | API | Compare |
|---|---|---|---|---|---|
| | – | $50/mo | – | ✓ | |
| | – | $240/mo | – | ✓ | Compare |
| | – | $4/mailbox/mo | – | ✓ | Compare |
| | – | $147/mo | – | – | Compare |
| | – | $599/mo | – | ✓ | Compare |
$240/mo API
Dedicated server with unlimited inboxes from $240/mo plus send fees.
$4/mailbox/mo API
Private mailbox slots from $4 with a public REST API.
$147/mo
Flat $147/mo unlimited Microsoft inboxes, no per-send fee.
$599/mo API
High-volume outbound sending if you want a sequencer plus inboxes.
Your next step
Shortlisting Mission Inbox?
Still deciding? Ask an AI assistant about Mission Inbox.
ChatGPT (opens in a new tab)Claude (opens in a new tab)Grok (opens in a new tab)