Maildoso Alternative: Lower Cost at Scale with Native Microsoft 365

We manage 650K+ inboxes across Microsoft 365, Google Workspace, and SMTP infrastructure for 1,500+ clients at MailDeck, maintaining 98% inbox placement. Based on Q1 2026 platform data.

Maildoso is popular for good reasons: easy setup, good integrations, and competitive entry-level pricing. MailDeck offers dedicated Microsoft 365 tenants at a lower per-inbox cost for high-volume operations. 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 for your operation.

Maildoso pricing verified on https://getmaildoso.com/pricing/new as of March 2026.

Quick Comparison

Pricing at Every Scale

Maildoso pricing (from their website):

• 70 mailboxes: approximately $2.25/mailbox
• 300 mailboxes: approximately $1.90/mailbox
• Larger volumes: custom quotes

MailDeck pricing:

Google Workspace:

• Start Up: 10 inboxes at $39/month ($3.90/inbox)
• Growth: 30 inboxes at $99/month ($3.30/inbox)
• Enterprise: 100 inboxes at $299/month ($2.99/inbox)

Outlook Normal Licence Tenants:

• 100 inboxes per tenant: $30/tenant ($0.30/inbox)

Outlook Premium Licence Tenants:

• 100 inboxes per tenant: $40/tenant ($0.40/inbox)

SMTP:

• Private SMTP: $0.50/inbox

Minimum orders:

• Outlook: 2 tenants (200 inboxes) → $60/month
• SMTP: 50 inboxes → $50/month
• Google Workspace: 10 inboxes → $39/month

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

Annual savings at 1,000 inboxes (SMTP): Approximately $6,000+/year with MailDeck vs Maildoso at scale.

Important context: Maildoso has a 70-mailbox minimum (~$158/month) with faster setup (~10 minutes). MailDeck minimums: SMTP 50 inboxes ($50/month), Outlook 200 inboxes ($60/month), Google Workspace 10 inboxes ($39/month) - all with 48-hour provisioning. The cost advantage shifts strongly to MailDeck once you pass 100 inboxes.

Infrastructure Differences

MailDeck: Dedicated Microsoft 365 Tenants

MailDeck provisions dedicated Microsoft 365 tenants, Google Workspace inboxes, Outlook tenants, and SMTP inboxes with automated DNS configuration (SPF, DKIM, DMARC). Your emails send through Microsoft's or Google's servers with their established 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.

Maildoso: SMTP and Google Workspace

Maildoso uses a mix of proprietary SMTP and Google Workspace accounts. They offer fast setup and good integrations with popular sequencers.

This matters if you need quick provisioning, prefer Google Workspace, or are targeting Gmail-heavy audiences.

Where MailDeck Falls Short

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

Setup speed. Maildoso delivers mailboxes in approximately 10 minutes. MailDeck takes 48 hours to provision Microsoft 365 tenants. If you need inboxes today, Maildoso wins.

Lower entry point. Maildoso's 70-mailbox plan costs approximately $158/month. MailDeck's minimum is SMTP 50 inboxes ($50/month), Outlook 200 inboxes ($60/month), or Google Workspace 10 inboxes ($39/month). For small tests, both are accessible at different entry points.

Flexibility at small scale. Maildoso's per-mailbox pricing lets you buy exactly what you need. MailDeck offers multiple products with different pricing models to suit various needs.

Where MailDeck Wins

Cost at scale. Once you pass 100 inboxes, MailDeck becomes significantly cheaper. At 500 SMTP inboxes, you're paying $250/month vs approximately $950/month with Maildoso.

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

Transparent scaling. MailDeck pricing is published and linear across all products. No tier jumping, no custom quotes needed. For a comparison across all providers, see our pricing analysis of 11 cold email providers.

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

Built for high-volume. MailDeck is designed for operations managing 500+ inboxes across multiple clients. To calculate capacity needs, see our inbox calculator.

MailDeck Pricing

Google Workspace Inboxes:

Minimum: Start Up plan (10 inboxes, $39/month)

Outlook Normal Licence Tenants:

Each tenant includes 100 inboxes. Minimum: 2 tenants (200 inboxes, $60/month)

Outlook Premium Licence Tenants:

Each tenant includes 100 inboxes. Minimum: 2 tenants (200 inboxes, $80/month)

SMTP Inboxes:

Minimum: 50 inboxes ($50/month)

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

FAQ

How much does Maildoso cost?

Maildoso charges approximately $2.25/mailbox for their 70-inbox plan and $1.90/mailbox for their 300-inbox plan. Larger volumes require custom quotes. Current pricing on https://getmaildoso.com/pricing/new.

How does MailDeck compare to Maildoso on price?

MailDeck charges $0.50/inbox (SMTP), $0.30-0.40/inbox (Outlook tenants), and $2.99-3.90/inbox (Google Workspace). At 1,000 SMTP inboxes, MailDeck costs $500/month vs Maildoso's custom quote pricing. The tradeoff: MailDeck requires 48-hour setup.

Does Maildoso offer instant setup?

Yes. Maildoso offers setup in approximately 10 minutes. MailDeck provisions native Microsoft 365 tenants which takes 48 hours but inherits Microsoft's established sender reputation.

Can I use both Maildoso and MailDeck?

Yes. Many teams use Maildoso for Google-based outreach and MailDeck for Microsoft 365-based outreach to enterprise prospects. Both can connect to the same sequencer.

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.

Which is better for small teams?

Maildoso has a lower entry point (~$158/month for 70 mailboxes) and faster setup (~10 minutes). MailDeck minimums: SMTP 50 inboxes ($50/month), Outlook 200 inboxes ($60/month), Google Workspace 10 inboxes ($39/month) - 48-hour setup. For teams testing cold email, both have accessible entry points. MailDeck becomes more cost-effective once you consistently need 100+ inboxes.

How long does MailDeck setup take?

48 hours. MailDeck provisions dedicated Microsoft 365 tenants with full DNS configuration. Maildoso delivers mailboxes in approximately 10 minutes.

Methodology

Data sources: MailDeck platform metrics from 650K+ managed inboxes across 1,500+ clients. Competitor pricing verified from public pricing pages as of March 2026. Inbox placement rate (98%) measured across MailDeck Microsoft 365 infrastructure over Q1 2026.

Limitations: Competitor pricing may change. Custom enterprise pricing not included.

Last updated: March 2026

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.

X View Profile