Primeforge offers Google Workspace and Microsoft 365 mailboxes at $4.50 per slot with automated DNS setup and API access. MailDeck provides three infrastructure types under one provider, starting at $0.30/inbox on Outlook Normal. At 1,000 inboxes, the annual cost difference exceeds $50,000.
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.
Primeforge pricing verified on primeforge.ai/pricing as of May 2026.
This comparison breaks down pricing at every scale, infrastructure tradeoffs, and where each provider fits. For a broader view, see our pricing analysis of 11 cold email providers.
Quick Comparison
| MailDeck | Primeforge | |
|---|---|---|
| Infrastructure types | Microsoft 365 + Google Workspace + SMTP | Google Workspace + Microsoft 365 |
| Cost per inbox (lowest) | $0.30 (Outlook Normal) | $4.50/slot |
| IP model | Official Microsoft/Google pools + dedicated SMTP | US IP addresses |
| Minimum purchase | $39/mo (10 Google inboxes) | 10 mailbox slots |
| Setup time | Instant (Google), 24h (SMTP), 2-3 days (Outlook) | Varies |
| DNS configuration | Automated SPF, DKIM, DMARC | Automated DNS setup |
| Sequencer integration | All SMTP-compatible tools | All SMTP-compatible tools |
| API access | No | Yes |
| Inboxes per domain | 5 (Google/SMTP) to 100 (Outlook) | Varies |
Pricing Comparison
Primeforge Pricing
| Item | Cost |
|---|---|
| Mailbox slot | $4.50/month (annual billing) |
| Domain (.com) | $14/year |
| Forge Expert Consulting | $500 (two 1:1 sessions) |
Minimum order: 10 mailbox slots. Two months free on annual billing. No long-term contracts. Slots allow deleting and creating mailboxes without extra charges.
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 | Primeforge | MailDeck (Outlook Normal) | Annual savings |
|---|---|---|---|
| 100 inboxes | $450/mo | $30/mo (1 tenant)* | $5,040/yr |
| 500 inboxes | $2,250/mo | $150/mo (5 tenants) | $25,200/yr |
| 1,000 inboxes | $4,500/mo | $300/mo (10 tenants) | $50,400/yr |
| 5,000 inboxes | $22,500/mo | $1,500/mo (50 tenants) | $252,000/yr |
*MailDeck Outlook minimum is 2 tenants ($60/mo, 200 inboxes).
At 1,000 inboxes, MailDeck Outlook Normal saves $50,400 per year over Primeforge. The gap is 15x at the per-inbox level: $0.30 versus $4.50.
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.
Each Outlook tenant includes 100 inboxes with automated SPF, DKIM, and DMARC. For DNS authentication details, see our SPF, DKIM, DMARC setup guide.
Primeforge: Google and Microsoft with Slot Model
Primeforge provides individual Google Workspace and Microsoft 365 mailboxes with US IP addresses and automated DNS setup. Their slot model lets teams delete and create mailboxes within allocated slots without additional charges. They offer API access for programmatic management.
The slot model provides flexibility for teams that frequently rotate mailboxes. API access is valuable for agencies or platforms integrating inbox provisioning into their own workflows.
Where MailDeck Falls Short
One objective disadvantage compared to Primeforge as an inbox provider.
Mailbox slot flexibility. Primeforge's slot model allows deleting and creating mailboxes within allocated slots at no additional charge. MailDeck provisions tenants with fixed 100-inbox configurations. Rotating individual inboxes within a tenant requires different management than swapping mailbox slots. For teams that rotate individual mailboxes frequently, Primeforge's model offers more granular control.
Where MailDeck Wins
15x lower cost per inbox. MailDeck Outlook Normal costs $0.30/inbox versus Primeforge's $4.50/slot. At 500 inboxes, MailDeck costs $150/month versus $2,250/month. At 1,000 inboxes, the annual savings reach $50,400.
Three infrastructure types. Primeforge offers Google and Microsoft. MailDeck adds Private SMTP with dedicated IPs per client as a volume buffer layer. Diversifying across Outlook, Google, and SMTP reduces single-point-of-failure risk and lets teams match infrastructure to their target audience.
100 inboxes per Outlook tenant. Each MailDeck Outlook tenant includes 100 inboxes per domain. At 1,000 inboxes, that is 10 tenants and 10 domains. Primeforge's per-slot model requires managing more individual mailbox configurations at the same scale.
Official provider IP pools. MailDeck Outlook inboxes route through official Microsoft IP pools, whitelisted by default on corporate mail servers. Google Workspace inboxes use official Google pools with the highest global trust score. These IPs carry institutional trust that does not depend on individual account age.
Pre-Warmed Outlook inboxes. MailDeck offers Pre-Warmed Outlook at $0.30/inbox with zero warmup and 8-10 cold sends/day from day one. Teams can start sending immediately without any warmup period.
Lower entry point. MailDeck starts at $39/month for 10 Google Workspace inboxes (instant setup). Primeforge requires a minimum of 10 slots at $4.50 each ($45/month). MailDeck is slightly cheaper at entry and offers more inboxes per dollar from the first purchase. To plan your infrastructure needs, see our inbox calculator.
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 Primeforge cost?
Primeforge charges $4.50 per mailbox slot per month on annual billing. Domains cost $14/year per .com. Minimum order is 10 mailbox slots. Two months free on annual billing, no long-term contracts. Pricing verified on primeforge.ai/pricing as of May 2026.
How does MailDeck compare to Primeforge on price?
MailDeck Outlook Normal costs $0.30/inbox versus Primeforge's $4.50/mailbox. At 500 inboxes, MailDeck costs $150/month versus Primeforge's $2,250/month. At 1,000 inboxes, the annual savings reach $50,400. MailDeck also offers Google Workspace from $2.99/inbox and Private SMTP from $0.40/inbox.
Does Primeforge offer SMTP inboxes?
Primeforge offers Google Workspace and Microsoft 365 mailboxes with US IP addresses and automated DNS setup. They do not list a dedicated SMTP product. MailDeck covers all three infrastructure types: Microsoft 365 Outlook, Google Workspace, and Private SMTP 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 agencies managing multiple clients?
At agency scale (500+ inboxes), MailDeck saves $25,200/year over Primeforge. Each MailDeck Outlook tenant includes 100 inboxes per domain, reducing DNS management overhead. MailDeck also offers a Diversified Stack combining Outlook, Google, and SMTP for multi-client risk distribution. Primeforge's slot model allows flexible mailbox creation and deletion without extra charges.
What is Primeforge's mailbox slot model?
Primeforge uses a slot-based model where each slot costs $4.50/month. You can delete and create mailboxes within your allocated slots without additional charges. This provides flexibility for rotating mailboxes. MailDeck provisions tenants with 100 inboxes each, with new tenants available within 2-3 days.
Methodology
Primeforge pricing verified on primeforge.ai/pricing 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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