WAlexa Internet
WAngelfish software
WAT Internet
WAWStats
WDuklr
WGoAccess
WGoogle Analytics
WKampyle (software)
WLibscore
WLiveChat
WMatomo (software)
WOpen Web Analytics
WBrandwatch
WQuantcast
WSawmill (software)
WSocial Blade
WStatCounter
WTelemetry (company)
WTopsy Labs
WW3Perl
WWebtrekk
WWorldometer
WYandex.Metrica