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JT

Jaan Tallinn

Also known as: Tallinn

Co-founder of Skype (2003); co-founder of Centre for the Study of Existential Risk (CSER, 2012) and Future of Life Institute (FLI, 2014); primary funder of Survival and Flourishing Fund (SFF) and Lightspeed Grants; major philanthropic donor to AI safety research

Current Role

Founder and philanthropist; primary funder of SFF (Survival and Flourishing Fund) and Lightspeed Grants

Born

1972

Age ~54

Net Worth

$900M

as of 2025

Organization Roles2

CSER (Centre for the Study of Existential Risk)FounderCurrent

Co-Founder

2012 – present

Survival and Flourishing Fund (SFF)Current

Funder & Initiative Committee Member

Board Seats1

Alliance to Feed the Earth in DisastersCurrent

Advisor

Education

University of Tartu; Gustav Adolf Grammar School

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Quick Assessment

Dimension	Assessment	Evidence
Giving Scale	Major Individual Donor	$51M in 2024; $150M+ estimated lifetime
Primary Vehicle	Survival and Flourishing Fund (SFF)	S-process algorithmic allocation; $34.33M distributed in a 2025 grant round
AI Safety Focus	≈86% of giving	Remainder: biosecurity (≈7%), forecasting, fertility, longevity, other GCR
Wealth Source	Tech Exits + Investments	Skype (sold 2005), Kazaa; DeepMind (acquired 2014); Anthropic Series A (2021)
Organizations Founded	CSER, FLI	Centre for the Study of Existential Risk (Cambridge, 2012); Future of Life Institute (2014)

Key Links

Source	Link
Wikipedia	en.wikipedia.org
LessWrong	2024 Philanthropy Overview
FLI Profile	futureoflife.org

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