Hi @ecommonist –
I’m sorry for the delay here in our response. We have a backlog of support requests at the moment, and we’re working through them as quickly as we can.
Without knowing the URLs to the sites in question, this is likely due to differences in how your analytics tools collect and report information.
For example, Jetpack’s stats do not include visits from logged in users by default. Many site owners find this useful, since tracking your own visits artificially inflates your traffic. That might be one explanation for the variance between your other stats system and Jetpack’s.
Jetpack also does not report visits in real-time. That is, there’s a bit of a lag between when visits occur, and when they are reported in your stats.
Additionally, there are certain search engine robots and “spiders” that Jetpack doesn’t count, and referrers that are considered spam referrers by Akismet (our spam-catching plugin) will not be reported in your stats. Other tracking systems may be less discerning in what they count toward the stats they report to you, and therefore give you different numbers than we do.
Finally, the different rates at which all these trackers are blocked by the different ad-blocking browser extensions can also affect your stats.
For all of those reasons, different stat tracking methods will rarely, if ever, be in sync. You may find it worthwhile to use tracking data from a variety of stats systems to develop a broad picture of your visitors’ behavior.
If you want to share a URL to an example site, we can look to make sure there isn’t an issue with the loading of Jetpack Stats on the frontend of your site.
