Mailin Alternative: Lower Cost with Native Microsoft 365

Mailin offers private email infrastructure with dedicated servers and a 21-day deliverability guarantee. MailDeck offers dedicated Microsoft 365 tenants at a lower per-inbox cost. Both serve the cold email market, but they make different tradeoffs.

This comparison breaks down pricing at every scale, the infrastructure differences, and when each provider makes more sense.

Mailin pricing verified on https://mailin.ai/#pricing-sec as of March 2026.

Quick Comparison

Pricing at Every Scale

Mailin pricing (from their website):

• Solopreneur: $299/mo for 200 accounts
• Business: $749/mo for 500 accounts
• Enterprise: $1,499/mo for 1,000 accounts

MailDeck pricing:

Google Workspace:

• Start Up (1-249 inboxes): $3.50/inbox
• Growth (250-1,249 inboxes): $3.00/inbox
• Enterprise (1,250+ inboxes): $2.80/inbox

Outlook Normal Licence:

• 1-20 tenants: $30/tenant
• 20-100 tenants: $28/tenant
• 100+ tenants: $25/tenant

Outlook Premium Licence:

• 1-20 tenants: $40/tenant
• 20-100 tenants: $38/tenant
• 100+ tenants: $35/tenant

SMTP:

• 1-1,000 inboxes: $0.50/inbox
• 1,000-5,000 inboxes: $0.45/inbox
• 5,000+ inboxes: $0.40/inbox

MailDeck prices shown for SMTP product. Google Workspace and Outlook tenant pricing also available — see full pricing below.

Annual savings at 1,000 inboxes: $12,588/year with MailDeck.

Important context: Mailin's minimum is $299/month for 200 accounts. MailDeck's pricing starts from $0.40/inbox for SMTP. MailDeck offers lower cost per inbox across multiple products. For a comparison across all providers, see our pricing analysis of 11 cold email providers.

Infrastructure Differences

MailDeck: Dedicated Microsoft 365 Tenants

MailDeck provisions a dedicated Microsoft 365 tenant for each domain. Each tenant includes 100 Outlook inboxes with automated DNS configuration (SPF, DKIM, DMARC). Your emails send through Microsoft's servers with Microsoft's sender reputation.

This matters most when your recipients are enterprise companies using Microsoft Exchange. Microsoft-to-Microsoft email receives higher trust from corporate spam filters. For DNS details, see our SPF, DKIM, DMARC setup guide.

Mailin: Private Dedicated Servers

Mailin runs private dedicated servers with separated infrastructure per user. They offer a 21-day deliverability guarantee and done-for-you setup.

This matters if you prefer private infrastructure over Microsoft 365, want their deliverability guarantee structure, or need done-for-you configuration.

Where MailDeck Falls Short

To give you an honest comparison, here's where Mailin has advantages:

Deliverability guarantee. Mailin offers a 21-day deliverability guarantee. MailDeck maintains 98% deliverability but doesn't offer contractual guarantees.

Done-for-you setup. Mailin handles setup with expert configuration. MailDeck's 48-hour automated setup doesn't include hands-on assistance.

Email verification. Mailin includes email verification as part of their service. MailDeck is infrastructure only.

Google Workspace focus. MailDeck offers both Microsoft 365 and Google Workspace, but our primary focus and strongest infrastructure is Microsoft 365. If you need equal focus on both, evaluate Mailin's offering.

Setup speed. MailDeck takes 48 hours for tenant provisioning. Mailin's done-for-you setup timeline varies.

Infrastructure only. MailDeck does not include a sequencer. You'll need Instantly, Smartlead, or similar separately.

Where MailDeck Wins

Lower cost at every scale. MailDeck costs 40-70% less than Mailin at every tier. At 1,000 SMTP inboxes, you save $12,588/year.

Dedicated infrastructure. Each MailDeck domain gets its own Microsoft 365 tenant. Your domains are fully isolated from other customers.

Transparent pricing. MailDeck pricing is published and transparent — pricing varies by product — see full pricing on our website. No tier jumping.

Enterprise deliverability. Microsoft 365 infrastructure has the highest trust with corporate mail servers. We maintain 98% inbox placement across 650K+ managed Outlook inboxes.

Simpler scaling. Add domains as needed without tier constraints. To plan capacity, see our inbox calculator.

MailDeck Pricing

Google Workspace Inboxes:

Outlook Normal Licence Tenants:

Outlook Premium Licence Tenants:

SMTP Inboxes:

All plans include automated DNS configuration (SPF, DKIM, DMARC).

FAQ

How much does Mailin cost?

Mailin costs $299/month for 200 accounts (Solopreneur), $749/month for 500 accounts (Business), and $1,499/month for 1,000 accounts (Enterprise). This works out to approximately $1.49/inbox. Current pricing on https://mailin.ai/#pricing-sec.

How does MailDeck compare to Mailin on price?

MailDeck charges from $0.40/inbox (SMTP) to $3.50/inbox (Google Workspace), plus Outlook tenants from $25/tenant. At 500 SMTP inboxes, MailDeck costs $250/month vs Mailin's $749/month. At 1,000 SMTP inboxes, MailDeck saves $12,588/year. The tradeoff: MailDeck requires 48-hour setup for Outlook tenants.

What infrastructure does Mailin use?

Mailin uses private dedicated servers with separated infrastructure per user. MailDeck uses native Microsoft 365 Outlook tenants with Microsoft's established sender reputation.

Can I use MailDeck with Instantly or Smartlead?

Yes. MailDeck is infrastructure only. It provides SMTP credentials that work with any sequencer: Instantly, Smartlead, Salesforge, Apollo, and any other SMTP-compatible tool.

Does Mailin offer a deliverability guarantee?

Yes. Mailin offers a 21-day deliverability guarantee. MailDeck maintains 98% deliverability across all tenants using Microsoft's established sender reputation.

Which has better deliverability?

Mailin offers a 21-day deliverability guarantee with private infrastructure. MailDeck maintains 98% deliverability using Microsoft's established sender reputation. For enterprise recipients on Microsoft Exchange, Microsoft-to-Microsoft email has the highest trust.

How long does MailDeck setup take?

48 hours. MailDeck provisions dedicated Microsoft 365 tenants with full DNS configuration. Mailin offers done-for-you setup with expert configuration.

Written by Sabo Nagy

Founder & CEO

Has built email infrastructure serving 650K+ inboxes across 1,500 clients. Specializes in email infrastructure strictly for high-volume cold outreach.

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