Members Only
5.4.26 - The Cognition Mafia
Iterative founding team, CPO, and Komodo leaders, plus Cognition engineers and Windsurf alumni with Jane Street, Neo, Five Rings, and IOI backgrounds
Members Only
4.30.26 - Fun Co-Founder & Founding Engineers, and Spring Health & Alma Leaders
Spring Health/Alma SVP, CTO, and CPO leaders, and Fun co-founder, interim CTO, and founding engineers
Members Only
4.22.26 - Skydio Early Autonomy Engineers, DeepMind Researcher, Ex YC Founder
Skydio early autonomy engineers, a GNC Lead from Reliable Robotics, Monk’s founding engineers, DeepMind / Google Brain Researcher, and ex-YC Founder
Members Only
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
Members Only
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
Members Only
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).
Members Only
3.26.26 - The Shield AI Mafia
Shield AI’s COO turned founder, Anduril’s former Chief Engineer, Tesla Cybertruck lead and Mach Industries build head, Founders Fund/Index-backed founding ML engineer, and a $100M Felicis-backed founder transitioning out of CEO
Members Only
3.5.26 - The Mach Industries Mafia
Former CTO, President, CISO, Founding Aerospace Engineer and other builders from Mach Industries.
Members Only
2.23.26 - Fluidstack Founders, IQM’s CFO & a Freeform Co-Founder from SpaceX
Co-Founder & President @ Freeform, Co-Founders @ Fluidstack, SVP Product @ Cross River (GC-backed Founder of Seed); 0→€200M+ finance lead @ IQM
Members Only
2.17.26 - PolyAI’s COO, a Repeat YC Founder, and Senior Talent from Braintrust & Temporal
PolyAI’s COO and Head of ML, Temporal’s product and engineering leads, Braintrust's Head of Biz Ops, plus a 7-year DeepMind researcher now building in robotics.
Members Only
2.12.26 - The Databricks Mafia
Acquired founders, MosaicML leaders, Spark architects, and MLflow authors building across security, inference, and infrastructure
Members Only
2.4.26 - Repeat Founders with $200M Exit, USV-Backed Founder, and Celestial AI's CTO
Repeat founders from the Day AI founder’s prior startup, a USV-backed founder, Celestial AI's CTO, and early builders from Uptool, Kindred, and Claroty.