Outpost vs Mailtrack

Mailtrack's strengthIts weaknessHow Outpost wins
Free unlimited open trackingGmail-only, branded signature, thin workflowMore generous free tier with no forced branding, plus Outlook, governance, and a full workspace.

Outpost unifies tracking, productivity, sales engagement, team inbox, CRM, AI, and governance across Gmail and Outlook — so you don't have to stitch Mailtrack together with four other tools.