Head to head

Maildoso vs Zapmail

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

Maildoso

$75/mo

SMTP mailboxes for cold email, from $75/mo for 30 inboxes. API and MCP on every plan. 30-day money-back.

Where Maildoso fits

  • Agencies that want cheap SMTP at volume
  • Teams automating inbox setup through MCP
  • Senders who will buy or connect their own domains
  • Shops that need self-healing rotating IPs

Zapmail

$39/mo

Google Workspace and Microsoft 365 mailboxes for cold email. Starter is $39/mo for 10 Google mailboxes.

Where Zapmail fits

  • Freelancers starting with 10 Google inboxes
  • Agencies that want pre-warmed Workspace accounts
  • Teams exporting to Instantly or Smartlead
  • Senders who need one domain per workspace

At a glance

DetailMaildosoZapmail
Starting price$75/mo$39/mo
Free tier–No–No
MCP server✓Yes–No
Public API✓Yes✓Yes
Listed underDeliverabilityDeliverability

Where they pull apart

Maildoso

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.

Not the right fit for

  • Buyers who need Google or Microsoft inboxes in the $75 pack
  • Senders who want a free trial rather than money-back

Zapmail

Stands out: Pre-warmed US/EU Google and Microsoft mailboxes with automated DNS and OAuth export to sequencers.

Watch out: API access starts on Pro at $299/mo. Extra Google mailboxes cost $3.50 each on Starter.

Not the right fit for

  • Buyers who need API access on Starter
  • Teams that want dedicated SMTP IPs they control

Pros and cons

Maildoso

  • $75/mo for 30 SMTP mailboxes
  • MCP and REST API on every plan
  • 30-day money-back guarantee
  • Domains extra on monthly plans
  • 15 cold emails per mailbox per day
  • No free trial, only money-back

Zapmail

  • Starter $39/mo for 10 mailboxes
  • Pre-warmed Google and Microsoft
  • OAuth export to major sequencers
  • API only on Pro at $299/mo
  • No published free trial
  • Extra Starter mailboxes are $3.50

What each one costs

Maildoso

$75/mo

Monthly SMTP packs: 30 mailboxes $75/month ($2.50 each), 300 mailboxes $225/month ($0.75), 1,000 mailboxes $499/month ($0.49). API and MCP included. Domains $12/year on monthly plans ($15 from 1 Oct 2026). 15 cold emails per mailbox per day. 30-day money-back is not a trial. Legacy quarterly packs still listed. Confirm current terms on the vendor site.

Checked 19 Sep 2026

Zapmail

$39/mo

Starter is $39/month for 10 Google mailboxes, extra mailboxes $3.50. Growth is $99/month for 30, extra $3.25. Pro is $299/month for 100, extra $3.00, and includes API access. All plans billed monthly. Pre-warmed Google and Microsoft accounts. No free trial. Confirm current terms on the vendor site.

Checked 19 Sep 2026

Common questions

Is Maildoso cheaper than Zapmail?
Zapmail starts lower, at $39/mo against $75/mo for Maildoso. That is the entry plan on each side, so the real number depends on seats and the tier you land on.
Can you try Maildoso or Zapmail for free?
Neither carries a free tier on our listing.
Does Maildoso or Zapmail have an MCP server?
Maildoso 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?