Tlen’s popularity peaked in the mid-2000s, driven by several key factors that set it apart from its competitors: 1. Extensibility and Plugins
: Literally translated as "ashes," "decay," or "dust," it refers to the process of decomposition and the ephemeral nature of life.
Despite its advanced technology, Tlen.pl struggled to dethrone , which had become a cultural icon (similar to AIM in the US or QQ in China). By the late 2000s, the rise of Skype, Facebook Messenger, and later WhatsApp made standalone Polish IM clients obsolete. Agora officially shut down the Tlen.pl service in the early 2010s.