Compare/Head to head

MailDeck vs PrimaryHub

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

Starting price

MailDeck

$30/domain/mo

Cold email infrastructure with Outlook tenants, Google Workspace, and SMTP. Outlook Normal is $30/domain/mo for 100 inboxes.

Where MailDeck fits

  • Agencies buying Outlook inboxes by the hundred
  • High-volume senders mixing Outlook, Google, and SMTP
  • Teams that want setup and domain replacement included
  • Operators who need many mailboxes per domain

PrimaryHub

$100/mo Free trial

Cold email platform for agencies and outbound teams that want sending, unlimited warmup, deliverability monitoring and one shared reply inbox under a single bill. Unlimited is $100 a month with unlimited contacts, sending and inboxes, Private is $200, and both start with a free trial.

Where PrimaryHub fits

  • Agencies running cold email for several clients from separate workspaces
  • Recruiting teams ramping many sending inboxes safely before candidate outreach
  • Outbound teams on Google Workspace and Microsoft 365 that want warmup matched to each
  • Teams that want reply triage done by their own AI key instead of bought credits

At a glance

DetailMailDeckPrimaryHub
Starting price$30/domain/mo$100/mo
Free tier–No–No
Free trialNot on recordYes
MCP server–No–No
Public API✓Yes–No
Listed underDeliverability, OutreachOutreach, Deliverability

Where they pull apart

MailDeck

Stands out: One US Microsoft tenant holds 100 Outlook inboxes, so 1,000 inboxes is 10 domains at the tenant rate.

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

Not the right fit for

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

PrimaryHub

Stands out: Warmup is provider matched rather than pooled: Google Workspace inboxes warm only with real Google Workspace inboxes and Microsoft 365 with Microsoft 365, which keeps them away from random SMTP servers where spam traps sit. It is unlimited on every plan, and AI reply tagging runs on your own DeepSeek, Claude, OpenAI, Gemini or Groq key, so there are no marked up AI credits.

Watch out: It is a young brand with no Capterra or G2 reviews yet, and the volume figures on its site (28,000+ mailboxes, 2,000+ domains) are the vendor's own. The $100 entry price is well above Smartlead or Instantly starter plans, so it pays off mainly for teams running many inboxes. AI tagging needs your own provider key and a paid account with that provider.

Not the right fit for

  • Solo senders with one or two inboxes who only need a cheap starter plan
  • Buyers who want a lead database bundled in (it has none)
  • Teams that want an established vendor with independent review history

Pros and cons

MailDeck

  • $30/domain/mo for 100 Outlook inboxes
  • Google, Outlook, and SMTP on one vendor
  • Google plans include API and webhooks
  • Outlook sold in 100-inbox tenants
  • Sale price sits under a higher regular rate
  • No published free trial

PrimaryHub

  • Unlimited inboxes and warmup on every plan
  • Provider matched warmup for Google and Microsoft
  • AI reply tagging on your own key, no credits
  • No independent review history yet
  • $100 entry price is high for small senders
  • No built in lead database

What each one costs

MailDeck

$30/domain/mo

Outlook Normal is $30/domain/mo for 100 inboxes (regular $45). Premium is $40 (regular $55). Mixed is $35. Google Workspace Starter is $39/mo for 10 slots, Growth $99/mo, Enterprise $299/mo. Private SMTP is $0.50/inbox. Diversified Starter is $99/mo. Extra Google mailboxes are $2.99-$3.50. Confirm current terms on the vendor site.

Checked 19 Sep 2026

PrimaryHub

$100/mo

Two plans, both with a free trial. Unlimited is $100 a month with unlimited contacts and sending. Private is $200 a month and adds a private sequencer, private OAuth and your own domain. Every plan includes unlimited connected inboxes and unlimited warmup with no add-on charge. AI reply sorting runs on your own AI provider key, so AI usage is billed by that provider. Confirm current terms on the vendor site.

Checked 18 Oct 2026

Common questions

Is MailDeck cheaper than PrimaryHub?
MailDeck starts lower, at $30/domain/mo against $100/mo for PrimaryHub. That is the entry plan on each side, so the real number depends on seats and the tier you land on.
Can you try MailDeck or PrimaryHub for free?
Neither carries a free tier on our listing. PrimaryHub offers a free trial.

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