Demon premièred internationally at the International Film festival in Toronto and was presented in the Main Competition at the 40th Gdynia Film Festival. The film was produced by Magnet Man Film Ltd. in coproduction with Telewizja Polska, Chimney Poland, Krakow Film Office, Israel's Transfax FilmProductions, IF Silesia Film, Lava Films and Wajda Studio.

'Demon is its own unique monster of sorts – moody and creepy, yet with an underlying satirical side that resonated with us. Marcin delivered a wonderfully original film and we hope to honor his memory with its release," said Paul Davidson, The Orchard’s SVP, Film and TV in an official statement.

Kino Świat premiered the film in Polish cinemas on 16 October 2015 with 26,328 tickets sold during the opening weekend.