A Puzzle Inbox Google inbox is a Google Workspace account, the same kind as PureMail’s, and its Outlook inboxes run in real Microsoft 365 tenants. Both companies set them up for you. The difference is how much each inbox is meant to send and how you receive it.
Puzzle Inbox plans for 12 cold emails a day per Google inbox, three to a domain, and 3 a day per Outlook inbox, 100 to a domain. That is how $0.35 Outlook inboxes work: you spread volume across hundreds of them. You get a CSV of credentials to load into your sequencer, with two-factor login switched off.
PureMail plans for about 30 cold emails a day per warmed Google Workspace or Microsoft 365 inbox, two to a domain, and connects every inbox to your sequencer for you. So Puzzle Inbox vs PureMail comes down to cost per email sent, not per inbox.