Work Insiders directory

MailDeck alternatives

4 tools our write-ups put next to MailDeck, with starting price, free tier, MCP and API side by side.

MailDeck from $30/domain/mo API

The short answer

  • Maildoso : Google Workspace inboxes if you want per-mailbox Google infra. From $75/mo
  • Mailforge : Done-for-you domains and inboxes with a different rate card. From $3/mailbox/mo
  • Cheap Inboxes : Lower-cost inboxes if tenant blocks are more than you need. From $3.50/mailbox/mo
  • Infraforge : Inbox infra billed per mailbox on yearly plans. From $4/mailbox/mo

Why people look past MailDeck

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

What we noted

  • Outlook sold in 100-inbox tenants
  • Sale price sits under a higher regular rate
  • No published free trial

Not the right fit for

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

Worth keeping in mind: One US Microsoft tenant holds 100 Outlook inboxes, so 1,000 inboxes is 10 domains at the tenant rate.

MailDeck alternatives compared

ToolFree tierFromMCPAPIHead to head
MailDeck (the one you are on) –No$30/domain/mo–No✓Yes
Maildoso Google Workspace inboxes if you want per-mailbox Google infra. –No$75/mo✓Yes✓YesHead to head
Mailforge Done-for-you domains and inboxes with a different rate card. –No$3/mailbox/mo–No–NoHead to head
Cheap Inboxes Lower-cost inboxes if tenant blocks are more than you need. –No$3.50/mailbox/mo✓Yes✓YesHead to head
Infraforge Inbox infra billed per mailbox on yearly plans. –No$4/mailbox/mo–No✓YesHead to head

What each one does differently

Maildoso

$75/mo MCP API

Why it comes up: Google Workspace inboxes if you want per-mailbox Google infra.

Stands out: MCP at mcp.maildoso.com plus REST so assistants can register domains and create mailboxes.

Watch out: Monthly plans skip domains ($12/year each). Cap is 1,000 mailboxes. A 30-day money-back window is not a trial.

Best for

  • Agencies that want cheap SMTP at volume
  • Teams automating inbox setup through MCP
  • Senders who will buy or connect their own domains

Read the Maildoso write-up MailDeck vs Maildoso

Mailforge

$3/mailbox/mo

Why it comes up: Done-for-you domains and inboxes with a different rate card.

Stands out: Automated SPF, DKIM, and DMARC plus mailbox slots you can delete and recreate at no extra cost.

Watch out: Minimum 10 mailbox slots. No free trial. You pay for slots even if some sit empty. Separate from Infraforge and Primeforge.

Best for

  • Teams starting shared-IP outbound cheaply
  • Senders who expect some spam complaints
  • Buyers who want yearly mailbox billing

Read the Mailforge write-up MailDeck vs Mailforge

Cheap Inboxes

$3.50/mailbox/mo MCP API

Why it comes up: Lower-cost inboxes if tenant blocks are more than you need.

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.

Best for

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

Read the Cheap Inboxes write-up MailDeck vs Cheap Inboxes

Infraforge

$4/mailbox/mo API

Why it comes up: Inbox infra billed per mailbox on yearly plans.

Stands out: Dedicated servers plus a public REST API at api.infraforge.ai for domains, mailboxes, and sequencer export.

Watch out: Minimum 10 slots. Extra IPs are $99 per month billed quarterly. No free trial. Separate from Mailforge.

Best for

  • Agencies that want private IPs they control
  • Teams automating mailbox setup through the API
  • Senders who follow strict deliverability rules

Read the Infraforge write-up MailDeck vs Infraforge

Common questions

What is the best MailDeck alternative?
It depends on what sent you looking. Our write-ups put Maildoso closest to MailDeck. Why it comes up: Google Workspace inboxes if you want per-mailbox Google infra. The table above shows all 4 on price, free tier, MCP and API.
What is the cheapest MailDeck alternative?
Of the published starting prices here, Mailforge is lowest at $3/mailbox/mo. Starting price is the entry plan, not the seat count you will end up on, so read the plan table on each listing.
Which MailDeck alternatives have an MCP server?
Maildoso and Cheap Inboxes ship a first party MCP server, so you can drive them from Claude or ChatGPT without building against the API yourself.

Keep looking

Back to the MailDeck write-up Every Deliverability tool we list Search the whole directory

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