Tlen ~upd~ (2026)

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.

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". Tlen uses a proprietary protocol for communication, which