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person2007–present

Michael Seibel

Disciplines:
entrepreneurship
venture capital
entrepreneurship/startup incubation

Summary

American entrepreneur and Y Combinator partner, co-founder of Justin.tv (which became Twitch), who became one of YC's most influential partners and a prominent voice on early-stage startup building.

Core Contribution

Founded Justin.tv and guided its pivot to Twitch — one of the most successful pivots in startup history — then at YC developed a direct, no-bullshit mentorship style that became widely influential in the startup community.

Key Spikes & Highlights

  • Ruthless Prioritization as Survival Skill (teaches founders to identify the single most important metric and refuse to work on anything else — a discipline he learned from Justin.tv nearly dying before the Twitch pivot)

Historical Influences

Paul Graham Jessica Livingston

Intellectual Lineage

Silicon Valley Startup Culture Y Combinator Tradition

Contemporaries & Peers

Paul Graham Sam Altman Garry Tan Dalton Caldwell

Minds Influenced

Brian Chesky Emmett Shear

Intellectual Posterity

Twitch Justin.tv pivot as pivot case study

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