If Microsoft 365 is your standard and you want to operate the environments you control, TenantCore keeps the infrastructure workflow centered there. InboxKit is a broader mailbox-infrastructure provider spanning Google Workspace, Microsoft 365, and Azure.
Quick comparison
If Microsoft 365 is your standard and you want to operate the environments you control, TenantCore keeps the infrastructure workflow centered there. InboxKit is a broader mailbox-infrastructure provider spanning Google Workspace, Microsoft 365, and Azure.
You are standardizing outbound infrastructure around Microsoft 365 rather than sourcing mailboxes across several providers. You want sending limits, Outlook access, alerts, reporting, and infrastructure status in the same operating layer. You want to connect the sending tools you already use without making mailbox procurement the center of the product.
You want to buy Google Workspace, Microsoft 365, and Azure mailbox infrastructure from one provider. Per-mailbox or Azure-tenant purchasing fits the way you build outbound infrastructure. A broad catalog of provisioned mailbox products and sequencer exports is your main requirement.
Where TenantCore fits
You are standardizing outbound infrastructure around Microsoft 365 rather than sourcing mailboxes across several providers.
You want sending limits, Outlook access, alerts, reporting, and infrastructure status in the same operating layer.
You want to connect the sending tools you already use without making mailbox procurement the center of the product.
Side by side
The important difference is not how many boxes each product can check. It is what you own, what the provider supplies, and what stays under your control as you scale.
Operating model
TenantCore
Operate your connected Microsoft 365 environments and the domains, mailboxes, limits, alerts, reports, and connections around them.
InboxKit
Purchase provisioned Google Workspace, Microsoft 365, or Azure mailbox infrastructure.
Provider scope
TenantCore
Focused on Microsoft 365 outbound infrastructure.
InboxKit
Google Workspace, Microsoft 365, and Azure mailbox products are part of the current offer.
DNS
TenantCore
Automatic DNS with supported providers, with guided manual setup everywhere else.
InboxKit
Automated DNS is included with its mailbox infrastructure offering.
Sending tools
TenantCore
Keep campaigns in your sending tool and manage supported mailbox connections from TenantCore.
InboxKit
Supports exports and integrations across a broad set of sending tools.
Ongoing operations
TenantCore
Infrastructure status, sending location, sending reputation, alerts, Reports, Outlook access, and daily limits remain part of the workflow.
InboxKit
Public plans emphasize mailbox provisioning, monitoring, integrations, API access, and webhooks.
Where InboxKit may fit better
InboxKit is not being treated as a bad product here. These are the situations where its current public model may match what you want more closely.
You want to buy Google Workspace, Microsoft 365, and Azure mailbox infrastructure from one provider.
Per-mailbox or Azure-tenant purchasing fits the way you build outbound infrastructure.
A broad catalog of provisioned mailbox products and sequencer exports is your main requirement.
Frequently asked
No. Your campaigns stay in the sending tool you already use. TenantCore manages the Microsoft 365 infrastructure behind the mailboxes and keeps supported connection status visible in one place.
No. TenantCore is designed to connect to Microsoft 365 environments you control. A separate managed-tenant option is available when you want TenantCore to supply the environment instead.
When the goal is to keep Microsoft 365 under your control while reducing repeated work across domains, mailboxes, DNS, sending limits, sending-tool connections, monitoring, alerts, and reporting.
Bring domains, mailboxes, DNS, daily limits, sending-tool connections, alerts, and reports into one operating workflow as you scale.