Mystrika
Puzzle Inbox provides pre-configured Google Workspace and Outlook 365 inboxes for cold email outreach, with OAuth setup included. The service offers both standard and pre-warmed inboxes at low monthly pricing, making it a budget-friendly option for sales teams and agencies needing multiple sending accounts.
Puzzle Inbox is a relatively new entrant in the cold email infrastructure space, offering pre-configured Google Workspace and Outlook 365 inboxes designed specifically for outbound sales campaigns. The service positions itself as a low-cost alternative to more established providers, with pricing starting as low as $0.35 per inbox for Outlook 365 accounts. What sets Puzzle Inbox apart is its inclusion of OAuth setup out of the box, which simplifies integration with modern email-sending platforms that require secure authentication.
The platform provides both standard and pre-warmed inbox options. Standard Google Workspace inboxes cost $3.00 per month, while pre-warmed versions -- which skip the typical 2-3 week warmup period -- are available at $4.50 per inbox. Outlook 365 standard inboxes are priced at just $0.35 each, making them the most affordable option for teams that need to scale quickly. All accounts come with full DNS configuration including SPF, DKIM, and DMARC records, so users can start sending immediately after receiving their credentials.
Puzzle Inbox claims to have served over 1,200 clients and deployed more than 70,800 active inboxes. The service promises delivery within 24-72 hours, and the lightweight onboarding process means minimal setup friction. For agencies and sales teams that need to spin up dozens or hundreds of inboxes without the overhead of managing domains and authentication records manually, this is a compelling value proposition.
However, there are notable caveats. The domain is only about a month old, and the owner's identity is not publicly disclosed. Scamadviser gives Puzzle Inbox a 64% trust score, which reflects the limited track record and anonymous ownership. While the pricing is undeniably attractive, buyers should approach with appropriate caution and consider starting with a small test batch before committing to large-scale deployment.
For budget-conscious outbound teams and early adopters who are comfortable with emerging providers, Puzzle Inbox offers a functional, low-cost way to access Google and Microsoft inboxes for cold email. The pre-warmed option is a genuine time-saver, and the inclusion of OAuth support means fewer integration headaches. That said, teams that prioritize vendor stability, transparency, and a long track record may want to compare against more established infrastructure providers before making a final decision.
Overall, Puzzle Inbox fills a clear gap in the market for ultra-low-cost, pre-configured inboxes. If the service can build a longer track record and improve its trust signals, it could become a go-to option for cost-sensitive cold email operations. For now, it's a viable choice for those willing to take a calculated risk in exchange for significant savings.
Features
- Google Workspace account provisioning
- Outlook 365 account provisioning
- OAuth setup included
- Full DNS configuration (SPF, DKIM, DMARC)
- Pre-warmed inbox option (skip warmup)
- Platform diversification (Google and Microsoft)
- 24-72 hour delivery
- Lightweight onboarding
Pricing
Pros
- Affordable pricing starting at $0.35/inbox
- Includes OAuth setup for secure integration
- Pre-warmed option saves 2-3 weeks of warmup time
- Both Google Workspace and Outlook 365 available
Cons
- New website with limited online presence
- Owner identity is hidden
- Low trust score on Scamadviser (64%)
- Limited track record as an emerging provider
Best For
Early adopters and budget-conscious teams needing affordable, pre-configured Google or Microsoft inboxes for cold email outreach