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Personnel: Jaan Tallinn at Skype (Co-founder, Lead Developer)

Verdictpartial85%
1 check · 4/9/2026

The source confirms Tallinn's involvement in Skype's development starting around 2003 and his role as a lead developer (implied by his work on the underlying FastTrack/Kazaa technology). However, the source does not explicitly identify him as a 'Co-founder' of Skype—it only says the P2P technology was 'repurposed to drive Skype.' The endDate of 2008 is unverifiable; the source only mentions he sold his shares in 2005 when eBay purchased Skype, but does not specify when his active involvement ended. The record is incomplete rather than contradicted.

Our claim

entire record
Role
Co-founder, Lead Developer
Role Type
career
Start Date
2003
End Date
2008
Is Founder
Yes
Notes
Co-founding engineer of Skype; wrote core networking code

Source evidence

1 src · 1 check
partial85%Haiku 4.5 · 4/9/2026

NoteThe source confirms Tallinn's involvement in Skype's development starting around 2003 and his role as a lead developer (implied by his work on the underlying FastTrack/Kazaa technology). However, the source does not explicitly identify him as a 'Co-founder' of Skype—it only says the P2P technology was 'repurposed to drive Skype.' The endDate of 2008 is unverifiable; the source only mentions he sold his shares in 2005 when eBay purchased Skype, but does not specify when his active involvement ended. The record is incomplete rather than contradicted.

Case № 5nL3lFjpu5Filed 4/9/2026Confidence 85%