How Many Cold Email Inboxes Do You Need?
Tool demo · Infrastructure Calculator
A short walkthrough of the free Warm Inboxes infrastructure calculator: enter a daily send target and get the number of inboxes and domains it takes, with the monthly cost.
Infrastructure Calculator
Work out how many inboxes and domains your target send volume needs, and what it costs, for prewarmed or fresh inboxes on Google, Microsoft 365 or Azure.
Run the Infrastructure Calculator → Free, no account.