Stealth Founders

Discovering tomorrow’s PayPal Mafia Today

4.9.26 - Khosla-Backed Unicorn Founders, a $100M a16z-Backed Bio Founder, and Early Sarvam & AfterQuery Builders

Apr 9, 2026

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6 min read

4.9.26 - Khosla-Backed Unicorn Founders, a $100M a16z-Backed Bio Founder, and Early Sarvam & AfterQuery Builders

Hermeus Co-Founders & first avionics hire turned YC-backed founder, Stipple Bio’s Co-Founder & CT), and early Sarvam AI & AfterQuery team

Apr 7, 2026

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5 min read

4.8.26 - The SpaceX Mafia Pt. 3

Serial CTO behind BuildOps (>$200M from Founders Fund), SpaceX Dragon & Falcon Senior Directors, Relativity’s former SVP of Manufacturing, YC founders, and a Shield AI engineering leader turned founder

Apr 6, 2026

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8 min read

4.7.26 - SpaceX Mafia (Pt. 2)

Shield AI’s Co-CTO, 14-year SpaceX Director, Starlink engineering leads, founders of $100M+ startups, and Anduril leaders building next-gen space and autonomy startups

Apr 5, 2026

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8 min read

4.6.26 - The SpaceX Mafia

Veteran SpaceX engineers and Starlink directors, ex–Anduril/Mach leaders, Founders Fund & Khosla-backed founding employees, and repeat YC Founders building in space and defense

Apr 5, 2026

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5 min read

4.5.26 - Top Founders of the Week

Founding MTS @ Physical Intelligence, Mistral researchers from DeepMind, OpenAI, and Meta FAIR, WHOOP CTO, Saronic robotics architect, and Mercury founders with exits to Chime and GM

Apr 1, 2026

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5 min read

4.2.26 - The Mercury Mafia

Mercury leaders with multiple exits (Chime, GM, Treehouse), repeat YC-backed founding engineers, early members of Anthropic-acquired Coefficient AI, and a GC-backed founding engineer

4.1.26 - Lightspeed-backed Founder, Crosby Builder, and Factory Engineers Starting New

Mar 31, 2026

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3 min read

4.1.26 - Lightspeed-backed Founder, Crosby Builder, and Factory Engineers Starting New

ScaleOps CTO ($800M valuation) and early builders from Crosby, Variance, and Factory (~$60M ARR, 6x growth).

Mar 30, 2026

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4 min read

3.31.26 - The Saronic & Whoop Mafia

WHOOP’s CTO (ex–Waymo Chief Engineer, Apple Autonomy, $130M co-founder), Saronic engineers launching a16z- and Boost-backed startups, a YC F25 repeat founder, and Whirl AI’s founding engineer

3.30.26 - The Physical Intelligence & Mistral Mafia

Mar 29, 2026

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3 min read

3.30.26 - The Physical Intelligence & Mistral Mafia

Founding MTS @ Physical Intelligence, Mistral Founding Member, Anduril early SF engineer, Mistral researchers from DeepMind, OpenAI, and Meta FAIR (Llama), and a founding team member from Bessemer-backed Sett