Pekka Kallioniemi (born 1981or1982)[1] is a Finnish researcher and social media influencer. He is known for Vatnik Soup, a series of Twitter posts which covers Russian propaganda.[2][3][4]
Kallioniemi graduated from Kuusamo Business College. He obtained a Master's degree in interactive technology and a doctorate in 2018 from Tampere University. Later, he became a postdoctoral researcher there.[1]
After Russia invaded Ukraine, Kallioniemi started to post about the war on Twitter, with his account becoming popular in Autumn 2022. In early 2025, Kallioniemi left the university to focus on his social media career.[1] Kallioniemi is assisted by a Lithuanian business partner. His activities are partially funded by the Netherlands and Estonia.[1] For his work, Kallioniemi became a subject of harassment and legal threats.[5]
Vatnik Soup
Starting in 2022, Kallioniemi began a series of Twitter threads, which he called Vatnik Soup. This name references the word Vatnik, a Russian pejorative term for supporters of Vladimir Putin. The threads covered people and organizations whom Kallioniemi considered to be spreaders of Russian disinformation.[6][7]Vatnik Soup was co-authored by Dutch historian Morten Hammeken.[8]
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