Piwik is the ideal Web Analytics software that respects Privacy, thanks to its Free/Libre software nature and useful Privacy settings, setting it apart from other commercial tools such as Google analytics.
To ensure and respect your visitors Privacy, you can:
1) Automatically anonymize Visitors IPs,
2) Include a analytics opt-out feature on your site (using a simple iframe),
3) Delete old visitors logs,
4) Respect Do Not Track setting.
To configure Privacy features in Piwik, log in as a Super User, click “Administration” then click “Privacy”. Learn more: Configure Privacy settings in Piwik.
PS: At Piwik, we also celebrate the Data Privacy Day every January 28th!