What are tools like Postmark Analytics or Litmus Email Analytics?

**Postmark** Analytics provides detailed sending metrics within their transactional platform: delivery times, bounce analysis, and engagement tracking focused on **transactional email** reliability. Known for granular time-to-inbox data.

**Litmus** Email Analytics tracks engagement after delivery: device and client breakdown, read time (how long recipients view emails), engagement patterns, and geographic data. It's post-send analysis complementing pre-send rendering tests.

Different focus: **Postmark** optimizes delivery mechanics; **Litmus** optimizes recipient experience. Choose based on your primary concern: reliable transactional delivery (**Postmark**) or understanding how recipients interact with content (**Litmus**).