Stealth Founders

Discovering tomorrow’s PayPal Mafia Today

Blockit

Jan 26, 2026

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4 min read

1.27.26 - The World Labs & Synthesia Mafias + The Early Blockit Team

Synthesia’s first PM and senior MLE, early World Labs researchers, and Blockit’s founding team.

Brex

Jan 25, 2026

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8 min read

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.

ClickHouse

Jan 22, 2026

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5 min read

1.23.26 - Top Founders of The Week

Repeat founders within ClickHouse and Pennylane, Anchorage founding engineers, a Cosmos co-founder, and senior operators from Zipline and Baseten.

Crypto

1.22.26 - Cosmos Founder Starting Anew and The Anchorage & BitGo Mafias

Jan 21, 2026

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4 min read

1.22.26 - Cosmos Founder Starting Anew and The Anchorage & BitGo Mafias

A Cosmos co-founder, Anchorage founding engineers, and repeat founders within BitGo.

AI Infrastructure

1.21.26 - The Zipline and Baseten Mafias

Jan 20, 2026

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5 min read

1.21.26 - The Zipline and Baseten Mafias

Repeat founders and founding engineers from Zipline, plus Baseten engineers and sales team

ClickHouse

Jan 19, 2026

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5 min read

1.20.26 - ClickHouse-Acquired Founder and Sequoia-Backed Founder On the Map

Repeat founders within ClickHouse and Pennylane, alongside early product, AI, and GTM leaders emerging from ElevenLabs, Terralayr, and Ethos.

Cerebras

+12

Jan 15, 2026

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5 min read

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.

Cerebras

Jan 14, 2026

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5 min read

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.

Founder

+10

Jan 13, 2026

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4 min read

1.14.26 - The Etched Mafia

Senior MTS and founding ML scientists from Etched, defense AI founders from Harmattan, and early product and AI leaders emerging from Aikido Security and Converge Bio.