Articles on: Data Explorer

How do I compare performance between two date ranges?

Track how your email metrics change over time by setting a primary date range and a comparison period side by side.


  1. Open the date picker from the top right of your dashboard (e.g. "Last week 2 – 8 Mar 2026").
  2. Under the Date range tab, select a preset (This week, Last month, Last quarter, etc.) or enter a custom From and To date manually.
  3. Click the Comparison tab.
  4. Choose a comparison mode.
  5. Click Apply. Your active comparison appears in the top right.


Comparison modes

  • Preceding period - the period immediately before your selected range
  • Year over year - the same range from one year ago
  • Month over month - the same range from the previous month
  • Same period -1 month - your range shifted back one month
  • Custom - pick any comparison window manually using the From and To fields


A few examples to use comparison

  • Set your range to Last week and choose Year over year to see how your open rates compare to the same week last year.
  • Use Month over month to track whether a new subject line strategy improved click-through rates since last month.
  • Pick Custom to compare performance during two specific campaigns that ran on different schedules.



Comparing periods in isolation tells you what happened. Comparing two periods tells you whether things are getting better or worse, and by how much. That context is what drives smarter decisions.


Let the calendar confirm your comparison. When you select a comparison period, it highlights in orange on the calendar. Use this as a quick sanity check to make sure SEINō is comparing exactly the dates you intended before hitting Apply.

Updated on: 09/03/2026