Tlen ((full)) -

Tlen uses a proprietary protocol for communication, which is not compatible with other instant messaging services. The service uses a centralized architecture, with servers located in Poland and other countries.

Did you use Tlen? Do you still remember your login (probably your Onet email)? Share your memories in the comments below—or just enjoy the silence of an empty contact list, one last time. Tlen uses a proprietary protocol for communication, which

Looking back, Tlen wasn't revolutionary in its technology—but it was revolutionary in its community . Do you still remember your login (probably your Onet email)

Tlen allowed you to search for other users by age, city, or interests. It was a chaotic, thrilling, and sometimes risky way to meet new people. For many shy teenagers, it was the first time they said "hi" to a complete stranger without blushing. Tlen allowed you to search for other users

In 2002, the Polish internet was still a wild west. International giants like ICQ and GG (Gadu-Gadu) were fighting for dominance. But Grupa Onet.pl —one of Poland’s largest portals—decided to enter the arena. They launched , a web-based instant messenger integrated directly into the Onet ecosystem.

Tlen was a pioneering instant messaging and file transfer service that played an important role in the development of online communication in Poland and other European countries. While it may no longer be active, Tlen remains a notable example of the early days of instant messaging and the evolution of online communication.

I'm assuming you meant "telen" or possibly a related term, but based on the input "tlen", I'll take a guess that you might be referring to "telen" as in "etylen" or a similar term, however I found "tlen" seems to relate to "tlen" as in Polish word for oxygen - "tlen".