There are other reasons, but PHP is a pretty big one. If we're going to use anything other than Google Analytics, we want to integrate it pretty deeply with our frontend. We were thinking of making a Flask extension that would capture all non-personal information without having to serve analytics code to the client. Also, as far as I know, Piwik does not support DNT.
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Have you decided to not use it only because it's written in PHP or are there any other reasons?
There are other reasons, but PHP is a pretty big one. If we're going to use anything other than Google Analytics, we want to integrate it pretty deeply with our frontend. We were thinking of making a Flask extension that would capture all non-personal information without having to serve analytics code to the client. Also, as far as I know, Piwik does not support DNT.
Piwik actually does support DNT and also can process server logs.
http://piwik.org/privacy/
http://piwik.org/log-analytics/