PuzzleInbox vs Inframail: Google Workspace vs Microsoft-Only Infrastructure
Inframail offers unlimited Microsoft inboxes at a flat rate — but no Google Workspace. See how pricing compares with warmup factored in.
Inframail Review: Is Unlimited Microsoft Cold Email Infrastructure the Right Choice?
Inframail (inframail.io) offers unlimited Microsoft 365 inboxes at a flat monthly rate. For agencies managing hundreds of inboxes, the math looks compelling.
The Google Workspace Gap
Inframail offers only Microsoft 365 cold email inboxes. Gmail accounts for approximately 28-35% of B2B email addresses. By going Microsoft-only, you cannot implement the platform diversification strategy.
| Feature | Puzzle Inbox | Inframail |
|---|---|---|
| Google Workspace | ✓ | — |
| Microsoft 365 | ✓ | ✓ |
| Pricing model | Per-inbox | Unlimited flat rate |
| Pre-warmed | ✓ | — |
| Platform diversification | ✓ | — |
| DNS setup | Automatic + verified | Included |
| Support | WhatsApp (15 min) |
Verdict: Inframail unlimited pricing is tempting for high-volume agencies. But the Microsoft-only limitation means you cannot optimize deliverability for 30%+ of B2B recipients. Puzzle Inbox dual-platform support with pre-warmed accounts is the safer, higher-performing choice.
Related Reading
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- 7 Best Inframail Alternatives for Outlook Cold Email in 2026 — Inframail offers unlimited Outlook inboxes but lacks Google Workspace. Here are 7 Inframail alternatives for cold email teams wanting better platform coverage.
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- Switching from Inframail to Puzzle Inbox Outlook: Migration Guide — Migrating from Inframail unlimited Azure tenant to Puzzle Inbox Outlook 365. Per-inbox vs unlimited tradeoffs and step-by-step migration.
- Best Inframail Alternative 2026: Top Pick for M365 Cold Email — Looking for an Inframail alternative? Top pick for 2026 with quality, warmup, and operational comparison vs Inframail.