Head to head

Cheap Inboxes vs MailDeck

Same facts, side by side: starting price, free tier, MCP, API and what each one is actually built for.

Cheap Inboxes

$3.50/mailbox/mo

Google and Microsoft inboxes for cold email, from $3.50 per mailbox per month. REST API and MCP included.

Where Cheap Inboxes fits

  • Agencies automating inbox orders through MCP
  • Teams that want one domain per workspace
  • Senders exporting over OAuth to Instantly or Smartlead
  • Buyers starting under 100 mailboxes

MailDeck

$30/domain/mo

Cold email infrastructure with Outlook tenants, Google Workspace, and SMTP. Outlook Normal is $30/domain/mo for 100 inboxes.

Where MailDeck fits

  • 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

At a glance

DetailCheap InboxesMailDeck
Starting price$3.50/mailbox/mo$30/domain/mo
Free tier–No–No
MCP server✓Yes–No
Public API✓Yes✓Yes
Listed underDeliverabilityDeliverability, Outreach

Where they pull apart

Cheap Inboxes

Stands out: MCP at api.cheapinboxes.com/mcp plus a REST checkout so agents can provision domains and mailboxes.

Watch out: The $3.50 rate is the 1-99 mailbox tier. Volume drops to $2.80 at 1,000-plus. Domains start at $2.50 per year extra.

Not the right fit for

  • Senders who need dedicated SMTP IPs they control
  • Teams that want domains included in the $3.50 rate

MailDeck

Stands out: One US Microsoft tenant holds 100 Outlook inboxes, so 1,000 inboxes is 10 domains at the tenant rate.

Watch out: Sale rates sit under a higher regular rate. Google extra mailboxes cost $2.99 to $3.50 each. SMTP is a different stack.

Not the right fit for

  • Buyers who want one mailbox without a 100-inbox tenant
  • Teams that only need a sequencer, not inboxes

Pros and cons

Cheap Inboxes

  • $3.50/mailbox/mo under 100
  • MCP and REST API included
  • Google and Microsoft same price
  • Domains extra from $2.50/year
  • No published free trial
  • Not dedicated SMTP you control

MailDeck

  • $30/domain/mo for 100 Outlook inboxes
  • Google, Outlook, and SMTP on one vendor
  • Google plans include API and webhooks
  • Outlook sold in 100-inbox tenants
  • Sale price sits under a higher regular rate
  • No published free trial

What each one costs

Cheap Inboxes

$3.50/mailbox/mo

1-99 mailboxes $3.50/mailbox/month, 100-249 $3.25, 250-999 $3.00, 1,000+ $2.80. Same price for Google and Microsoft. Domains from $2.50/year. API and MCP included. No free trial stated. Confirm current terms on the vendor site.

Checked 19 Sep 2026

MailDeck

$30/domain/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 19 Sep 2026

Common questions

Is Cheap Inboxes cheaper than MailDeck?
Cheap Inboxes starts lower, at $3.50/mailbox/mo against $30/domain/mo for MailDeck. That is the entry plan on each side, so the real number depends on seats and the tier you land on.
Can you try Cheap Inboxes or MailDeck for free?
Neither carries a free tier on our listing.
Does Cheap Inboxes or MailDeck have an MCP server?
Cheap Inboxes ships a first party MCP server, so an AI assistant can work the product directly.

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Editorial listings, never paid rankings. Prices checked 19 Sep 2026. Confirm current terms on the vendor site. Spot an error?