Head to head

Maildoso vs Mailflow

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

Mailflow

$49/mo

Mailflow sells email infrastructure and deliverability for outbound teams. The listing floor is $49/mo.

Where Mailflow fits

  • Outbound teams standing up sending domains and mailboxes in bulk
  • Agencies that want infra plus deliverability without a $599 EmailBison bill
  • RevOps replacing Google Workspace inboxes used only for cold mail
  • Senders who already have a sequencer and need cleaner pipes

At a glance

DetailMaildosoMailflow
Starting price$75/mo$49/mo
Free tier–No–No
MCP server✓Yes–No
Public API✓Yes–No
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

Mailflow

Stands out: The product is the mailbox and domain layer (infra plus deliverability), not a copy editor and not a LinkedIn sequencer.

Watch out: You still attach a sequencer such as Instantly or Smartlead on top. Mailflow is the pipes, not the cadence UI.

Not the right fit for

  • Users who only need a Gmail merge add-on
  • Teams shopping for LinkedIn automation

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

Mailflow

  • Infra-plus-deliverability at a $49/mo listing floor
  • Aimed at outbound volume, not internal Gmail
  • Cheaper entry than EmailBison's $599/mo listing
  • Not a LinkedIn or multichannel sequencer
  • Mailbox counts at $49 need a live check
  • Overlap with Instantly plans that already include warmup

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

Mailflow

$49/mo

Mailflow lists from $49/mo for outbound email infrastructure and deliverability. Confirm live mailbox, domain, and IP counts on the vendor pricing page. Confirm current terms on the vendor site.

Checked 19 Sep 2026

Common questions

Is Maildoso cheaper than Mailflow?
Mailflow starts lower, at $49/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 Mailflow for free?
Neither carries a free tier on our listing.
Does Maildoso or Mailflow 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?