Fathom Numbers Different From Google Analytics

How to fix it

Try these in order — the most common fix is first.

1. 1. Compare like with like

   Copy steps
   1. Check both scripts are on the same pages
   2. Pick a date range when both were installed
   3. Align the timezone setting in both tools
   Did this fix it? Yes No

2. 2. Check SPA and duplicate tracking

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   1. If Fathom shows more pageviews, look for duplicate snippets or automatic plus manual pageview calls
   2. If it shows fewer, make sure SPA route changes are tracked (data-spa or trackPageview)
   Did this fix it? Yes No

3. 3. Hide imported data when comparing

   Copy steps
   1. If you used the GA4 importer, open the dashboard Options menu
   2. Untick Show imported data to see only native Fathom numbers
   Did this fix it? Yes No

Symptoms

Visitors, pageviews or time on page in Fathom are higher or lower than Google Analytics, a CMS's built-in stats or server logs.

Why it happens

• Ad blockers blocking one tool more than the other
• Unique visitors reset daily in Fathom for privacy
• Fathom filters nearly all bots; GA removes only known bots
• Time on page measured differently and capped at 30 minutes
• Tools installed on different pages or for different date ranges
• Timezone differences shifting traffic between days
• SPA route changes counted by one tool and not the other

This guide also covers

• fathom vs google analytics numbers
• fathom analytics inaccurate
• fathom counting more pageviews

Other Fathom Analytics errors

• Fathom Analytics Not Working (No Visits Showing)
• Fathom Only Showing Homepage in Stats
• Fathom Analytics Blocked by Ad Blockers
• Fathom Events Not Showing Up
• Fathom Not Tracking Page Changes in Next.js and SPAs
• Fathom WordPress Plugin Not Tracking
• Fathom Referrers Missing or Showing as Direct
• Fathom Google Search Console Data Not Showing