Criteria

Google analytics 

Woopra 

Alexa 

Pricing

Free

Free for up to 30,000 actions/month

$9.99 per month

Type of data collecetd by tool

Tracks and reports website traffic including where visitors came from (referrers), how long they stayed and their geographical position.

Builds a behavioral profile for every visitor and member of your website

Records the pageviews per user, bounce rate percentage, time on site, percentage of visits receievd from search engines and which site vistors are most likely to go to next 

Real-time data

24 hour lag time

Yes

Yes

Social media

There are 8 Social Analytics reports available in Google Analytics.

Identifies customers reffered to website by social media

Identifies customers reffered to website by social media