Premium Inboxes sells Google Workspace and Microsoft 365 mailboxes at $2.80-4.50 per inbox with under 12-hour setup. MailDeck provides three infrastructure types under one provider, starting at $0.30/inbox on Outlook Normal. Both target cold email operations, but MailDeck adds Private SMTP as a third infrastructure layer and runs at a significantly lower price point across every scale level.
MailDeck manages 833K+ inboxes across Microsoft 365, Google Workspace, and SMTP for 1,631+ clients, sending 7.5M+ emails per day with a 98% inbox placement rate. Based on Q2 2026 MailDeck platform data.
Premium Inboxes pricing verified on premiuminboxes.com as of May 2026.
For a broader comparison, see our pricing analysis of 11 cold email providers.
Quick Comparison
| MailDeck | Premium Inboxes | |
|---|---|---|
| Infrastructure types | Microsoft 365 + Google Workspace + SMTP | Google Workspace + Microsoft 365 |
| Cost per inbox (lowest) | $0.30 (Outlook Normal) | $2.80 (Enterprise tier) |
| IP model | Official Microsoft/Google pools + dedicated SMTP | Google and Microsoft IPs |
| Minimum purchase | $39/mo (10 Google inboxes) | 1 inbox |
| Setup time | Instant (Google), 24h (SMTP), 2-3 days (Outlook) | Under 12 hours |
| Warmup time | 0 days (Pre-Warmed) to 3-4 weeks (SMTP) | Varies |
| Sends per inbox per day | 3-22 (varies by type) | Varies |
| DNS configuration | Automated SPF, DKIM, DMARC | Complete technical setup |
| Sequencer integration | All SMTP-compatible tools | Uploaded directly to sequencer |
| Inboxes per domain | 5 (Google/SMTP) to 100 (Outlook) | Varies |
Pricing Comparison
Premium Inboxes Pricing
| Tier | Volume | Cost per inbox |
|---|---|---|
| Start Up | 1-249 inboxes | $3.50/inbox |
| Growth | 250-1,249 inboxes | $3.00/inbox |
| Enterprise | 1,250+ inboxes | $2.80/inbox |
| Insured Infrastructure | Any volume | $4.50/inbox |
The Insured tier adds 24-hour active monitoring and priority build queue. Annual billing saves 20%.
MailDeck Pricing
Outlook Normal: $30/tenant (100 inboxes), $0.30/inbox.
Outlook Premium: $40/tenant (100 inboxes), $0.40/inbox. 8-10 cold sends/day/inbox.
Pre-Warmed Outlook: $30/tenant (100 inboxes), $0.30/inbox. Zero warmup.
Google Workspace: Start Up 10 inboxes $39/mo ($3.90/inbox) | Growth 30 inboxes $99/mo ($3.30/inbox) | Enterprise 100 inboxes $299/mo ($2.99/inbox).
Private SMTP: 1-1,000 inboxes $0.50/inbox | 1,001-5,000 $0.45/inbox | 5,001+ $0.40/inbox. Dedicated IP per client.
Head-to-Head at Scale
| Scale | Premium Inboxes | MailDeck (Outlook Normal) | Annual savings |
|---|---|---|---|
| 200 inboxes | $700/mo (Start Up) | $60/mo (2 tenants) | $7,680/yr |
| 500 inboxes | $1,500/mo (Growth) | $150/mo (5 tenants) | $16,200/yr |
| 1,000 inboxes | $3,000/mo (Growth) | $300/mo (10 tenants) | $32,400/yr |
| 1,250 inboxes | $3,500/mo (Enterprise) | $390/mo (13 tenants) | $37,320/yr |
At 1,000 inboxes, MailDeck Outlook Normal saves $32,400 per year. The gap widens at higher volumes because MailDeck's per-tenant pricing stays flat while Premium Inboxes maintains per-inbox billing.
Infrastructure Differences
MailDeck: Three Provider Types with Official IPs
MailDeck provisions dedicated Microsoft 365 tenants, Google Workspace accounts, and Private SMTP inboxes. Outlook tenants route through official Microsoft Azure IP pools. Google Workspace uses official Google IP pools. SMTP uses dedicated IPs per client. Zero shared IP risk across any product.
Each Outlook tenant includes 100 inboxes with automated SPF, DKIM, and DMARC configuration. Teams can diversify sending across all three infrastructure types using the recommended 50/30/20 diversification ratio for optimal deliverability and risk management.
Premium Inboxes: Google and Microsoft Mailboxes
Premium Inboxes provides official Google Workspace and Microsoft 365 accounts with complete technical setup. They offer unlimited replacement inboxes, a real-time dashboard, and direct upload to sequencers. The Insured Infrastructure tier adds 24-hour active monitoring.
Their focus on Google and Microsoft covers the two most trusted inbox providers. They do not list a dedicated SMTP product.
Where MailDeck Falls Short
Three objective disadvantages compared to Premium Inboxes as an inbox provider.
Higher minimum order. Premium Inboxes allows purchasing a single inbox. MailDeck's lowest minimum is 10 Google Workspace inboxes at $39/month. For teams testing with fewer than 10 inboxes, Premium Inboxes is more accessible.
Slower Outlook setup. Premium Inboxes delivers mailboxes in under 12 hours. MailDeck Outlook tenants take 2-3 days for provisioning with full DNS verification. MailDeck Google Workspace provisions instantly, and SMTP is ready in 24 hours.
Unlimited replacement inboxes. Premium Inboxes includes unlimited replacements as a standard feature. MailDeck provisions new tenants or inboxes as needed, and recommends maintaining a 20-25% reserve of active domain count for burn management.
Where MailDeck Wins
Dramatically lower cost at every scale. MailDeck Outlook Normal costs $0.30/inbox versus Premium Inboxes' $2.80-3.50/inbox. At 1,000 inboxes, the annual savings are $32,400. Even MailDeck's SMTP product at $0.50/inbox undercuts Premium Inboxes' lowest tier by 82%.
Three infrastructure types. Premium Inboxes covers Google and Microsoft. MailDeck adds Private SMTP as a third layer, giving teams a cheap volume buffer that protects premium inboxes from burning. A diversified stack across all three providers reduces single-point-of-failure risk.
100 inboxes per Outlook tenant. Each MailDeck Outlook tenant includes 100 inboxes on a single domain. This reduces the number of domains needed and simplifies DNS management at scale. To calculate how many inboxes you need for your volume targets, see our inbox calculator.
Official provider IP pools. MailDeck Outlook and Google Workspace inboxes route through the same IP pools that Fortune 500 companies use. These IPs are whitelisted by default on corporate mail servers globally. MailDeck maintains 98% inbox placement across 833K+ managed inboxes based on Q2 2026 platform data.
Pre-Warmed Outlook inboxes available. MailDeck offers Pre-Warmed Outlook at $30/tenant ($0.30/inbox) with zero warmup required and 8-10 cold sends/day/inbox from day one.
MailDeck Full Pricing
Outlook Normal Licence
| Tenants | Price per tenant | Inboxes | Cost per inbox |
|---|---|---|---|
| 2+ | $30/tenant | 100 per tenant | $0.30 |
Setup: 2-3 days. Warmup: 5-7 days. Cold sends: 3-5/day/inbox.
Outlook Premium Licence
| Tenants | Price per tenant | Inboxes | Cost per inbox |
|---|---|---|---|
| 2+ | $40/tenant | 100 per tenant | $0.40 |
Setup: 2-3 days. Warmup: 3-5 days. Cold sends: 8-10/day/inbox.
Pre-Warmed Outlook
| Tenants | Price per tenant | Inboxes | Cost per inbox |
|---|---|---|---|
| 2+ | $30/tenant | 100 per tenant | $0.30 |
Zero warmup. Ready immediately. Cold sends: 8-10/day/inbox.
Google Workspace
| Plan | Inboxes | Monthly price | Cost per inbox |
|---|---|---|---|
| Start Up | 10 | $39/mo | $3.90 |
| Growth | 30 | $99/mo | $3.30 |
| Enterprise | 100 | $299/mo | $2.99 |
Setup: Instant. Warmup: 2-3 weeks. Cold sends: 18-22/day/inbox. 5 inboxes per domain.
Private SMTP
| Volume | Cost per inbox |
|---|---|
| 1-1,000 inboxes | $0.50 |
| 1,001-5,000 inboxes | $0.45 |
| 5,001+ inboxes | $0.40 |
Setup: 24 hours. Warmup: 3-4 weeks. Cold sends: 11-14/day/inbox. Dedicated IP per client.
All plans include automated DNS configuration (SPF, DKIM, DMARC).
FAQ
How much does Premium Inboxes cost?
Premium Inboxes charges $3.50/inbox at 1-249 inboxes (Start Up), $3.00/inbox at 250-1,249 (Growth), $2.80/inbox at 1,250+ (Enterprise), and $4.50/inbox for Insured Infrastructure at any volume. Setup is under 12 hours. Pricing verified on premiuminboxes.com as of May 2026.
How does MailDeck compare to Premium Inboxes on price?
MailDeck Outlook Normal costs $0.30/inbox. At 500 inboxes, MailDeck costs $150/month versus Premium Inboxes' $1,500/month (Growth tier). At 1,000 inboxes, MailDeck costs $300/month versus $3,000/month. Annual savings at 1,000 inboxes exceed $32,000. MailDeck also offers Google Workspace from $2.99/inbox and Private SMTP from $0.40/inbox.
Does Premium Inboxes offer SMTP inboxes?
Premium Inboxes offers Google Workspace and Microsoft 365 mailboxes. They do not list a dedicated SMTP product. MailDeck covers all three infrastructure types: Microsoft 365 Outlook at $0.30-0.40/inbox, Google Workspace at $2.99-3.90/inbox, and Private SMTP at $0.40-0.50/inbox with dedicated IPs per client.
Can I use MailDeck with Instantly or Smartlead?
Yes. MailDeck is infrastructure only and provides SMTP credentials that work with any sequencer: Instantly, Smartlead, Saleshandy, Apollo, Lemlist, Woodpecker, Reply.io, Snov.io, QuickMail, GMass, and any other SMTP-compatible tool.
Which is better for small teams starting cold email?
Premium Inboxes allows purchasing as few as 1 inbox with under 12-hour setup. MailDeck's lowest entry is 10 Google Workspace inboxes at $39/month (instant setup) or 2 Outlook tenants at $60/month (200 inboxes, 2-3 day setup). For teams buying fewer than 10 inboxes, Premium Inboxes is more accessible. At 10+ inboxes, MailDeck becomes more cost-effective.
Does Premium Inboxes offer replacement inboxes?
Yes. Premium Inboxes offers unlimited replacement inboxes across their plans. MailDeck provisions new tenants or inboxes as needed but does not advertise unlimited replacements as a standard feature. For domain burn management strategy, MailDeck recommends maintaining a 20-25% reserve of active domain count.
Methodology
Premium Inboxes pricing verified on premiuminboxes.com as of May 2026. MailDeck pricing from published rates at maildeck.co. MailDeck platform data based on Q2 2026 metrics: 833K+ managed inboxes, 1,631+ clients, 7.5M+ daily emails, 270M+ cold emails sent lifetime, 3,000+ domains under management, 98% inbox placement rate.
Last updated: May 2026
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