Head to head

Cheap Inboxes vs Primeforge

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

Primeforge

$4.50/mailbox/mo

Google Workspace and Microsoft 365 mailboxes for cold email, from $4.50 per mailbox per month billed yearly. 10-slot minimum.

Where Primeforge fits

  • Teams that want real Google or Microsoft inboxes
  • Senders using ESP matching for inbox placement
  • Shops automating setup through the Primeforge API
  • Buyers already on Salesforge or Mailforge

At a glance

DetailCheap InboxesPrimeforge
Starting price$3.50/mailbox/mo$4.50/mailbox/mo
Free tier–No–No
MCP server✓Yes–No
Public API✓Yes✓Yes
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

Primeforge

Stands out: US-IP Google and Microsoft mailboxes so you can match the ESP your prospects use.

Watch out: Minimum 10 mailbox slots. No free trial. Yearly billing is the $4.50 rate; monthly is higher.

Not the right fit for

  • Buyers who need fewer than 10 mailboxes
  • Teams that want a free trial before buying slots

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

Primeforge

  • Real Google and Microsoft mailboxes
  • REST API included
  • US IP addresses
  • 10 mailbox slot minimum
  • No free trial
  • Empty slots still bill

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

Primeforge

$4.50/mailbox/mo

Mailbox slots $4.50/month billed yearly, 10-slot minimum. 25 slots are $94/month yearly vs $113/month monthly..com domains $14/year. API included. No free trial. Cancel anytime. Each Forge product is a separate subscription. Confirm current terms on the vendor site.

Checked 19 Sep 2026

Common questions

Is Cheap Inboxes cheaper than Primeforge?
Cheap Inboxes starts lower, at $3.50/mailbox/mo against $4.50/mailbox/mo for Primeforge. 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 Primeforge for free?
Neither carries a free tier on our listing.
Does Cheap Inboxes or Primeforge have an MCP server?
Cheap Inboxes ships a first party MCP server, so an AI assistant can work the product directly.

Not the pair you wanted?

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