Compare/Head to head

Cheap Inboxes vs Puzzle Inbox

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

Starting price

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

Puzzle Inbox

$0.35/inbox

Pre-warmed Google and Outlook inboxes for cold email. Outlook starts at $0.35 per inbox. Google starts at $3.

Where Puzzle Inbox fits

  • Teams that want cheap Outlook inboxes at volume
  • Senders who will spread volume across many inboxes
  • Buyers who want DNS already configured
  • Shops considering a done-for-you mailbox bundle

At a glance

DetailCheap InboxesPuzzle Inbox
Starting price$3.50/mailbox/mo$0.35/inbox
Free tier–No–No
MCP server✓Yes–No
Public API✓Yes–No
Listed underDeliverabilityDeliverability

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

Puzzle Inbox

Stands out: Outlook 365 inboxes at $0.35 each with 100 inboxes per domain, sold beside Google at $3.

Watch out: Outlook allows only 3 emails per inbox per day. Google is 12 per day and 3 inboxes per domain. Delivery takes 24 to 72 hours.

Not the right fit for

  • Senders who need 20-plus emails per inbox per day
  • Teams that must have Google-only infrastructure

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

Puzzle Inbox

  • Outlook inboxes from $0.35 each
  • Pre-warmed Google option at $3
  • DNS configured for you
  • Outlook capped at 3 emails/day
  • 24-72 hour delivery window
  • 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 4 Nov 2026

Puzzle Inbox

$0.35/inbox

Outlook 365 Standard is $0.35/inbox ($0.50 warmed), 100 inboxes per domain, 3 emails/inbox/day. Google Workspace Standard is $3/inbox ($4.50 warmed), 3 inboxes per domain, 12 emails/inbox/day. Delivery 24-72 hours. Done-for-you Starter/Growth/Scale bundles listed without printed bundle totals. Confirm current terms on the vendor site.

Checked 4 Nov 2026

Common questions

Is Cheap Inboxes cheaper than Puzzle Inbox?
Puzzle Inbox starts lower, at $0.35/inbox against $3.50/mailbox/mo for Cheap Inboxes. 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 Puzzle Inbox for free?
Neither carries a free tier on our listing.
Does Cheap Inboxes or Puzzle Inbox 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 4 Nov 2026. Confirm current terms on the vendor site. Spot an error?