Tlen ((link))

O2 developed Tlen to be faster, more stable, and more customizable. One of its greatest strategic moves was . Tlen allowed users to communicate with their contacts on Gadu-Gadu, effectively removing the biggest barrier to switching platforms. You didn't have to choose between your Tlen friends and your GG friends; you could have both in one window. Why Users Loved Tlen

Tlen is a popular Polish instant messaging and VoIP (Voice over Internet Protocol) service that allows users to communicate with each other through text, voice, and video. Launched in 2003, Tlen has become one of the most widely used communication platforms in Poland. This report provides an overview of Tlen's features, functionality, and technical aspects. O2 developed Tlen to be faster, more stable,