Huge difference in collected data :(


We are using your analytics tool for quite some time now and we are starting to question it’s reliability.
Besides Piwik we use 2 other tools (Google Analytics and IBM Coremetrics) and we are seeing huge gaps between the data.

I last 30 days (from 13.6. til 12.7) Piwik tracked for around 65k users while both Google and Coremetrics tracked around 95k.

Tracking codes for Google and Piwik are both placed in head, Coremetrics is placed in the footer.

What could be the cause of this?

Piwik version 2.13. Installed on 64-bit Intel Xeon E7-8870 2.4GHz 2.0GHz (dual core), 4 GB RAM, Apache 2.4.10, PHP 5.6.9, MySql 5.6.21

My tracking code:

<!-- Piwik -->
<script type="text/javascript">
  var _paq = _paq || [];
  _paq.push(["setDocumentTitle", document.domain + "/" + document.title]);
  _paq.push(["setCookieDomain", "*"]);
  _paq.push(["setDomains", ["*","*","*",...,"*"]]);

  //Comply with EU Law
  if (eu_opt_in_cookie_analytics != 1){

  (function() {
    var u=(("https:" == document.location.protocol) ? "https" : "http") + "://";
    _paq.push(['setTrackerUrl', u+'piwik.php']);
    _paq.push(['setSiteId', 1]);
    var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0]; g.type='text/javascript';
    g.defer=true; g.async=true; g.src=u+'piwik.js'; s.parentNode.insertBefore(g,s);
<noscript><p><img src="" style="border:0;" alt=""/></p></noscript>
<!-- End Piwik Code -->

Thank you for your help in advance
Jure Simon

Hi there,

how many pageviews did you see track in each tool?

Around 290k in Piwik, 340k in GA and 375k in IBM Coremetrics.

Hi there,

to keep things all in the same post, could you please post your numbers in this forum post: 301 Moved Permanently