Stats will never match what is found in google analytics or other stat software. The main reasons are listed below.
Factors that affect open/clicks totals in stats programs
Unique clicks/vs total clicks same with unique opens/total opens
People who click then cancel/close the browser
People who block google analytics
Google Analytics may not work in all browser setups
Antivirus and antispam clicks might checks links or they may not like Bitly links.
What we do provide is a complete full transparent real-time reporting for all opens and clicks. For opens, we log the date/time, email address, IP address, user agent and provide what country/state when possible they opened from. For clicks, we log the date/time, email address, IP address, user agent, what exact link they clicked and provide what country/state