Priit Kasesalu
Estonian programmer and software developer (born 1972)
About Priit Kasesalu
Born 1972. Priit Kasesalu is an Estonian programmer, software developer and computer scientist.
Priit Kasesalu (born 10 April 1972) is an Estonian programmer and software developer best known for his participation in the development of Kazaa, Skype and, most recently, Joost. He currently works for Ambient Sound Investments and lives in Tallinn, Estonia.
Biography He started off as programmer for a local hardware manufacturer in 1986 with his class-mate Jaan Tallinn. The company was assembling 8-bit computers for use in public schools.
In 1992 he studied computer science at Tallinn Technical University.
Work In 1989 he created the first Estonian commercial computer game with Ahti Heinla and Jaan Tallinn, Kosmonaut. This was later remade as SkyRoads and has been further remade/adapted by other companies numerous times.
In 2003 he helped develop Skype with Janus Friis and Niklas Zennström, as well as Heinla and Tallinn. These five also developed Kazaa and Joost.
He has made various contributions to SubSpace under the username PriitK, particularly the Continuum client.
Projects The following is a list of projects participated in by Priit Kasesalu. Kosmonaut (1992) SkyRoads (1993) Sound Club (1993) Tigma SuperScroll (1995) Roketz (PC platform, 1995) The Art of Flying (1996) Sequel to Sound Club (1996) Thunder Brigade (1998) Subspace Continuum (1995) Kazaa (2001) Skype (2003) Joost (2006)
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Important facts
People in Priit Kasesalu's life
Named in this biography and alive at the same time
Contemporaries
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Frequently asked questions
Who is Priit Kasesalu?
Estonian programmer and software developer (born 1972)
When was Priit Kasesalu born?
Priit Kasesalu was born on 10 April 1972.
What is Priit Kasesalu's occupation?
Priit Kasesalu is a programmer, software developer and computer scientist.
What nationality is Priit Kasesalu?
Priit Kasesalu is Estonian.
Sources & further reading
Cite this page
APA: Biography.guide. (2026). Priit Kasesalu. https://biography.guide/priit-kasesalu/
MLA: "Priit Kasesalu." Biography.guide, https://biography.guide/priit-kasesalu/.
Chicago: "Priit Kasesalu." Biography.guide. https://biography.guide/priit-kasesalu/.
Data last updated: 2026-09-22 · Spot an error? Report a correction.
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