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YC

1.29.26 - The Farcaster Mafia + Early Members from Outtake, Zocks, and Mine
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Mine

1.29.26 - The Farcaster Mafia + Early Members from Outtake, Zocks, and Mine

Farcaster’s co-founders and early engineers post-acquisition, plus first hires and senior operators spinning out of Outtake, Decagon, Zocks, and Mine.
1.28.26 - The Rogo, Phia, and Waabi Mafias
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Rogo

1.28.26 - The Rogo, Phia, and Waabi Mafias

Phia’s CTO, Rogo’s first FTE and Head of Product, repeat founders, and Waabi Founding Researcher.
1.26.26 - The Brex Mafia
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Brex

1.26.26 - The Brex Mafia

Brex’s co-founder, CRO, founding engineers, first hires, and senior product, infra, data, and security leaders now building in stealth.
1.21.26 - The Zipline and Baseten Mafias
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AI Infrastructure

1.21.26 - The Zipline and Baseten Mafias

Repeat founders and founding engineers from Zipline, plus Baseten engineers and sales team
1.16.26 Top Founders of the Week
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Cerebras

1.16.26 Top Founders of the Week

Early product engineers and MTS from Anthropic, a Chief of Staff from SkildAI, the first product hire from Discord, and AI-chip engineers spinning out of Etched and Cerebras.
1.15.26 - The Cerebras Mafia
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Cerebras

1.15.26 - The Cerebras Mafia

Principal MTS and research scientists from Cerebras, a Chief of Staff from SkildAI, technical PM leadership from Alpaca, and early engineers and interns spinning out of Harmonic.
1.13.26 - The Anthropic Mafia
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1.13.26 - The Anthropic Mafia

Anthropic’s early product, research, and MTS talent, plus repeat founders building across AI infrastructure, policy, and safety.