MailDeck
Managed cold email infrastructure across Microsoft 365, Google Workspace and private SMTP: inboxes, DNS and warmup, not a sequencer.
From $30/domain/mo API
Bottom line
Cold email infrastructure with Outlook tenants, Google Workspace, and SMTP. Outlook Normal is $30/domain/mo for 100 inboxes.
Stands out for: One US Microsoft tenant holds 100 Outlook inboxes, so 1,000 inboxes is 10 domains at the tenant rate.
Watch out for: Sale rates sit under a higher regular rate. Google extra mailboxes cost $2.99 to $3.50 each. SMTP is a different stack.
Overview
MailDeck sells managed cold email inboxes across Microsoft Outlook, Google Workspace, private SMTP, and mixed stacks. Outlook Normal is $30 per domain per month for 100 inboxes, marked down from $45, with 4 to 5 cold sends per inbox per day. Premium is $40 per domain for 8 to 10 sends. Mixed is $35. Google Workspace Starter is $39 per month for 10 mailbox slots and 2 domains. Private SMTP is $0.50 per inbox.
Agencies pick MailDeck to buy inbox capacity in tenant blocks instead of paying per mailbox at Google rates. Growth Google is $99 per month for 30 slots. Enterprise Google is $299 per month for 100 slots. Diversified stacks start at $99 per month. Google plans include API access and webhooks. Outlook cards list 15-plus sending-tool connections. There is no published free trial.
Who it's for
Best for
- Agencies buying Outlook inboxes by the hundred
- High-volume senders mixing Outlook, Google, and SMTP
- Teams that want setup and domain replacement included
- Operators who need many mailboxes per domain
Not ideal for
- Buyers who want one mailbox without a 100-inbox tenant
- Teams that only need a sequencer, not inboxes
Key features
Multi-provider infra. Microsoft 365 Outlook tenants, Google Workspace and private SMTP under one provider. Not a sequencer; connects via SMTP to Instantly, Smartlead, Lemlist, Apollo and others.
Turnkey DNS & auth. SPF, DKIM and DMARC configured per domain; provisioning marketed at 48–72 hours for Outlook, faster for Google/SMTP.
Warmup & replacement. Included warmup or pre-warmed Outlook tenants; free domain replacement under normal burn conditions; US/EU IP positioning marketed.
Volume economics. Outlook at ~100 inboxes per domain with published per-inbox send limits; Diversified Stack bundles mix Outlook/SMTP/Google for resilience.
Pricing
| Plan | Price | What you get |
|---|---|---|
| Outlook Normal | $30/domain/mo | 100 inboxes; regular $45 |
| Outlook Premium | $40/domain/mo | Regular $55 |
| Google Workspace Starter | $39/mo | 10 slots |
| Google Workspace Growth | $99/mo | |
| Google Workspace Enterprise | $299/mo |
Outlook Normal is $30/domain/mo for 100 inboxes (regular $45). Premium is $40 (regular $55). Mixed is $35. Google Workspace Starter is $39/mo for 10 slots, Growth $99/mo, Enterprise $299/mo. Private SMTP is $0.50/inbox. Diversified Starter is $99/mo. Extra Google mailboxes are $2.99-$3.50. Confirm current terms on the vendor site.
Checked 4 Nov 2026. Vendors change prices without notice.
Is MailDeck expensive?
MailDeck starts at $30/domain/mo. We list 53 deliverability tools in total. 10 have a free tier, and those with a public price typically start around $29 a month.
- 5 quote-based
- 10 free tier
- 50 public price
Worked out automatically from every deliverability listing, so it updates as the directory changes.
Pros and cons
Pros
- $30/domain/mo for 100 Outlook inboxes
- Google, Outlook, and SMTP on one vendor
- Google plans include API and webhooks
Cons
- Outlook sold in 100-inbox tenants
- Sale price sits under a higher regular rate
- No published free trial
What's new at MailDeck
No updates logged yet. Follow MailDeck and we will email you when it announces something new or its starting price changes.
Follow MailDeck
Get an email when MailDeck ships a new feature, posts release notes or changes its starting price. Only when something changes, and you can stop in one click.
How MailDeck compares
See all MailDeck alternatives, with what each one does differently and a head to head for every pairing.
| Tool | Free tier | From | MCP | API | Compare |
|---|---|---|---|---|---|
| | – | $30/domain/mo | – | ✓ | |
| | – | $75/mo | ✓ | ✓ | Compare |
| | – | $3/mailbox/mo | – | – | Compare |
| | – | $3.50/mailbox/mo | ✓ | ✓ | Compare |
| | – | $4/mailbox/mo | – | ✓ | Compare |
$75/mo MCP API
Google Workspace inboxes if you want per-mailbox Google infra.
$3/mailbox/mo
Done-for-you domains and inboxes with a different rate card.
$3.50/mailbox/mo MCP API
Lower-cost inboxes if tenant blocks are more than you need.
$4/mailbox/mo API
Inbox infra billed per mailbox on yearly plans.
Your next step
Shortlisting MailDeck?
Still deciding? Ask an AI assistant about MailDeck.
ChatGPT (opens in a new tab)Claude (opens in a new tab)Grok (opens in a new tab)
Frequently asked questions
What is MailDeck?
Is MailDeck free?
Does MailDeck have an MCP server or API?
What are alternatives to MailDeck?
Is MailDeck your product? Add the Listed on Work Insiders badge
Put this on your site so buyers can read an independent write up. It links to this page.
More about the badge: workinsiders.com/badge. Something wrong in this listing? Tell us.