Validating Discrepancies Between Google Analytics and Mixpanel User Data

Hi team, I’m currently working on moving my client’s marketing team to Mixpanel, and we’re seeing major and hard-to-ignore gaps between GA and Mixpanel. While GA reports around 8K new user visits over the past month, Mixpanel reports only 3.5K. My assumption is that Mixpanel’s numbers are the more accurate ones, but I need a way to validate this. I’d love to hear ideas on what I can do to verify and understand the discrepancy. Thanks! Moran