Stop shopping for cheap inboxes. Build the stack with SimpleInboxes.
Puzzle Inbox sells the commodity layer: Google Workspace and Outlook inboxes, with pre-warmed options. SimpleInboxes gives you the operating layer around the inboxes: Microsoft, Google, SMTP+, Azure-style infrastructure, no minimum order, WhatsApp support, API access, DNS workflows, and Domain Recovery Pool.
Microsoft
$2.99/mo
$3.30/mo
Minimum order
1 inbox
Support
SimpleInboxes stack
One dashboard. Every inbox type.
Microsoft
SMTP+
Azure
SimpleInboxes
Full stack
Puzzle Inbox
Narrower setup
Quick verdict
SimpleInboxes wins where it matters.
SimpleInboxes makes Puzzle Inbox look incomplete: you get inboxes plus the operational system around them, with no minimum order, broader provider coverage, direct WhatsApp support, API access, and Domain Recovery Pool.
- Buy control and continuity, not a one-off mailbox handoff
- Keep provider mix, DNS, API access, support, and recovery under one roof
- Avoid treating pre-warm as a strategy when you need real infrastructure operations
Comparison
How SimpleInboxes compares to Puzzle Inbox
If you are comparing Puzzle Inbox, you are probably looking at price and warmup. That is too narrow. Cheap or pre-warmed mailboxes do not solve client operations, provider mix, API workflows, escalation, or domain recovery. SimpleInboxes is built for the parts of cold email infrastructure that actually break at scale.
Why SimpleInboxes
Built for the work after the first order
Cold email infrastructure is not just provisioning. It is support, recovery, client management, and clean operations when campaigns change.
POST /api/v1/orders
{
"provider": "microsoft",
"workspace": "client_a"
}
Not inventory
Cheap inboxes are not an infrastructure strategy
A pre-warmed inbox can get you started. SimpleInboxes gives you the system to keep ordering, managing, supporting, and recovering infrastructure after launch.
Microsoft
SMTP+
Azure
Broader stack
More ways to build when campaigns change
SimpleInboxes keeps Microsoft, Google, SMTP+, and Azure-style infrastructure in one dashboard, so provider strategy does not become another vendor hunt.
Recovery Pool
domain health
Second life
Do not throw away domains just because a campaign got messy
SimpleInboxes gives reputation problems a recovery path. That is the difference between infrastructure discipline and buying another pile of inboxes.
Questions
Puzzle Inbox alternative FAQ
Short answers for teams comparing cold email infrastructure providers before they move domains and inboxes.
Why choose SimpleInboxes over Puzzle Inbox?
Choose SimpleInboxes because it is a complete operating layer, not just inbox inventory. You get Microsoft, Google, SMTP+, Azure-style options, no minimum order, WhatsApp support, API access, DNS workflows, and domain recovery.
Is Puzzle Inbox just cheaper?
Cheap inboxes are not a strategy. SimpleInboxes is for teams that would rather pay for control, provider flexibility, direct support, API access, DNS workflow, and recovery than optimize only for the lowest mailbox line item.
What is the real SimpleInboxes advantage?
The advantage is everything around the inbox: clean ordering, no minimums, broader providers, human support, API access, client-friendly operations, and a recovery path when infrastructure gets damaged.
Ready for simpler inbox infrastructure?
Start with one inbox, scale to thousands, and get a real human in the loop when infrastructure needs attention.