Members Only
Discovering Tomorrow's PayPal Mafia Today
Highlighting founders emerging from top startups
Read by investors managing $100B+ AUM. Limited to 200 members.
Top Posts
Members Only
8.9.26 - Top Founders of the Week
Founders and CTOs from Forward, Segment, Function Health, and Summer Health building again, alongside SpaceX-trained K2 Space leaders.
Members Only
7.28.26 - Top Founders of the Week
Co-Founders of Chainguard, Fluidstack & Colossal Biosciences, plus OpenSea’s former CTO and early employees & GMs from Atoms
Members Only
8.21.26 - Top Founders of the Week
Simile’s 1st hire and 5th MTS, Gravis Robotics’ co-founder, Higgsfield’s founding research talent, Fish Audio’s co-founders and founding engineer, Neros’ former COO, and Paradigm’s 1st employee & GP.
Members Only
8.20.26 - Paradigm’s 1st Employee, Partners & VP Eng + Early Heroku, Privy & Multiverse Leaders
Paradigm’s 1st employee, research and investment partners, and VP Engineering, alongside Heroku’s 1st engineer, Privy’s 2nd FTE & founding engineer, and Multiverse Computing’s former COO.
Members Only
8.19.26 - Physical-World Founders from Hadrian’s Engineering Ranks + Form Energy’s VP Eng, Interim CFO & Early Leaders
Hadrian engineering, product, and manufacturing talent, plus Form Energy’s former VP Engineering, 2nd finance hire & interim CFO, and battery leaders building newcos.
Members Only
8.18.26 - Fish Audio & Palona AI Co-Founders + Neros COO & SpaceX Alum
Two Fish Audio co-founders and its founding engineer, Neros’ former COO and SpaceX veteran, plus Palona AI’s co-founding engineering lead building newco.
Members Only
8.17.26 - Founders & Early Builders from Higgsfield, Simile, Gravis Robotics & SkyPilot
Higgsfield’s founding researcher, Simile’s 1st hire and 5th MTS, a Gravis Robotics co-founder, and SkyPilot talent building YC-backed Tokenless.
Members Only
8.14.26 - Top Founders of the Week
Members Only
8.13.26 - The Lovable Mafia
Lovable’s founding engineer, 1st hire, founding team, ~20th employee, and early GTM builders spinning out — including three YC S26 founders and an a16z Speedrun-backed team.
Members Only
8.12.26 - The Decart Mafia
Decart’s founding product and engineering team, COO and VP Ops, plus MIT AI researchers spinning out as the $6B–$7B company explores a sale.
Members Only
8.11.26 - The Whatnot Mafia & Cambridge Aerospace Founding Talent
Acquired founders, OpenAI and early growth talent from Whatnot building again, alongside founding-era engineers leaving $3.4B Cambridge Aerospace.
Members Only
8.10.26 - The Fireworks AI Mafia
Fireworks AI’s early core technical team, RL infra and engineering leaders, CMO, and PM's exploring new chapters.
Members Only
8.9.26 - Top Founders of the Week
Founders and CTOs from Forward, Segment, Function Health, and Summer Health building again, alongside SpaceX-trained K2 Space leaders.
Members Only
8.4.26 - The Airtable Mafia
Former Airtable CTOs, GMs, founding leaders, and acquired founders.
Repeat Founder
Members Only
8.19.26 - Physical-World Founders from Hadrian’s Engineering Ranks + Form Energy’s VP Eng, Interim CFO & Early Leaders
Hadrian engineering, product, and manufacturing talent, plus Form Energy’s former VP Engineering, 2nd finance hire & interim CFO, and battery leaders building newcos.
Members Only
8.18.26 - Fish Audio & Palona AI Co-Founders + Neros COO & SpaceX Alum
Two Fish Audio co-founders and its founding engineer, Neros’ former COO and SpaceX veteran, plus Palona AI’s co-founding engineering lead building newco.
Members Only
8.14.26 - Top Founders of the Week
Founding Engineer
Members Only
8.21.26 - Top Founders of the Week
Simile’s 1st hire and 5th MTS, Gravis Robotics’ co-founder, Higgsfield’s founding research talent, Fish Audio’s co-founders and founding engineer, Neros’ former COO, and Paradigm’s 1st employee & GP.
Members Only
8.17.26 - Founders & Early Builders from Higgsfield, Simile, Gravis Robotics & SkyPilot
Higgsfield’s founding researcher, Simile’s 1st hire and 5th MTS, a Gravis Robotics co-founder, and SkyPilot talent building YC-backed Tokenless.
Members Only
8.14.26 - Top Founders of the Week
Repeat Founding Engineer
Members Only
8.20.26 - Paradigm’s 1st Employee, Partners & VP Eng + Early Heroku, Privy & Multiverse Leaders
Paradigm’s 1st employee, research and investment partners, and VP Engineering, alongside Heroku’s 1st engineer, Privy’s 2nd FTE & founding engineer, and Multiverse Computing’s former COO.
Members Only
8.17.26 - Founders & Early Builders from Higgsfield, Simile, Gravis Robotics & SkyPilot
Higgsfield’s founding researcher, Simile’s 1st hire and 5th MTS, a Gravis Robotics co-founder, and SkyPilot talent building YC-backed Tokenless.
Members Only
8.13.26 - The Lovable Mafia
Lovable’s founding engineer, 1st hire, founding team, ~20th employee, and early GTM builders spinning out — including three YC S26 founders and an a16z Speedrun-backed team.
AI
Members Only
8.21.26 - Top Founders of the Week
Simile’s 1st hire and 5th MTS, Gravis Robotics’ co-founder, Higgsfield’s founding research talent, Fish Audio’s co-founders and founding engineer, Neros’ former COO, and Paradigm’s 1st employee & GP.
Members Only
8.17.26 - Founders & Early Builders from Higgsfield, Simile, Gravis Robotics & SkyPilot
Higgsfield’s founding researcher, Simile’s 1st hire and 5th MTS, a Gravis Robotics co-founder, and SkyPilot talent building YC-backed Tokenless.
Members Only
8.14.26 - Top Founders of the Week
Applied AI
Members Only
8.18.26 - Fish Audio & Palona AI Co-Founders + Neros COO & SpaceX Alum
Two Fish Audio co-founders and its founding engineer, Neros’ former COO and SpaceX veteran, plus Palona AI’s co-founding engineering lead building newco.
Members Only
8.9.26 - Top Founders of the Week
Founders and CTOs from Forward, Segment, Function Health, and Summer Health building again, alongside SpaceX-trained K2 Space leaders.
Members Only
7.16.26 - Khosla-Backed Founding Engineer, Repeat 9-Figure Founders & Deeptune’s 1st Engineer
Bunkerhill Health’s founding engineer, repeat 9-figure founders, Wonder’s founding and early team, and Deeptune’s #1 founding engineer.
Fintech
Members Only
7.14.26 - NEA-Backed Founder in Stealth, Founding Engineers of Hadrius, and Neko Growth Leaders
Hadrius’ early engineers founding two YC startups, Valarian’s former Co-Founder & COO and VP of Engineering reuniting, and Neko Health operators.
Members Only
7.13.26 - Top Founders of the Week
Early MTS hires from Etched, Chai Discovery's founding scientist, Together AI's founding engineering and research leaders, and CRED's founding product team.
Members Only
7.9.26 - Peregrine's Deployment Team & CRED's Founding Product Leaders
Deployment leaders from Peregrine, CRED's founding product team and repeat founders, and an early Castelion engineer building the next defense prime.
Infrastructure
Members Only
8.20.26 - Paradigm’s 1st Employee, Partners & VP Eng + Early Heroku, Privy & Multiverse Leaders
Paradigm’s 1st employee, research and investment partners, and VP Engineering, alongside Heroku’s 1st engineer, Privy’s 2nd FTE & founding engineer, and Multiverse Computing’s former COO.
Members Only
8.2.26 - Founding leaders from Forward and Segment, DroneDeploy-acquired Founders, and early builders from Cognition's latest acquisition.
Co-founders of Forward and Segment, whose founders now lead Foundational Industries and Revoy, building again plus DroneDeploy founders and early builders from Cognition's latest acquisition starting new.
Members Only
7.28.26 - Top Founders of the Week
Co-Founders of Chainguard, Fluidstack & Colossal Biosciences, plus OpenSea’s former CTO and early employees & GMs from Atoms
Defense
Members Only
7.19.26 - Top Founders of the Week
Prime Intellect's founding research and protocol leaders, Helsing's AI directors, deployed engineers, and acquired founder, Shaped's co-founder following its Whatnot acquisition, Valarian's co-founders, TerraFirma's interim COO, and MicroAGI's co-founder.
Members Only
7.15.26 - The Helsing Mafia
Helsing-acquired founder, AI directors, deployed AI engineers, and product leaders building Europe's next generation of defense startups.
Members Only
7.9.26 - Peregrine's Deployment Team & CRED's Founding Product Leaders
Deployment leaders from Peregrine, CRED's founding product team and repeat founders, and an early Castelion engineer building the next defense prime.
Biotech
Members Only
7.31.26 - Function’s Co-Founding CTO, Antora’s CFO & Sequoia-Backed Summer Health Co-Founder
Function Health’s Co-Founding CTO, Antora’s CFO and 5th commercial hire, the Co-Founder of Lux- and Sequoia-backed Summer Health, and Sail Biomedicines’ Chief Scientific Officer
Members Only
7.28.26 - Top Founders of the Week
Co-Founders of Chainguard, Fluidstack & Colossal Biosciences, plus OpenSea’s former CTO and early employees & GMs from Atoms
Members Only
7.26.26 - Co-Founders of Fluidstack’s Co-Founders & Colossal Biosciences
Fluidstack’s co-founders, VP and directors of infrastructure and power systems; plus Colossal’s co-founder/CBO, Head of Biological Sciences, hardware director, and AI, computational biology, and stem-cell talent.
Healthcare
Members Only
8.20.26 - Paradigm’s 1st Employee, Partners & VP Eng + Early Heroku, Privy & Multiverse Leaders
Paradigm’s 1st employee, research and investment partners, and VP Engineering, alongside Heroku’s 1st engineer, Privy’s 2nd FTE & founding engineer, and Multiverse Computing’s former COO.
Members Only
8.9.26 - Top Founders of the Week
Founders and CTOs from Forward, Segment, Function Health, and Summer Health building again, alongside SpaceX-trained K2 Space leaders.
Members Only
8.2.26 - Founding leaders from Forward and Segment, DroneDeploy-acquired Founders, and early builders from Cognition's latest acquisition.
Co-founders of Forward and Segment, whose founders now lead Foundational Industries and Revoy, building again plus DroneDeploy founders and early builders from Cognition's latest acquisition starting new.
Crypto
Members Only
8.21.26 - Top Founders of the Week
Simile’s 1st hire and 5th MTS, Gravis Robotics’ co-founder, Higgsfield’s founding research talent, Fish Audio’s co-founders and founding engineer, Neros’ former COO, and Paradigm’s 1st employee & GP.
Members Only
6.11.26 - The Mistral Mafia
Mistral's former Chief Business Officer, researchers from OpenAI and DeepMind, a healthcare AI founder from Morpho, and repeat engineering leaders behind multiple acquisitions
Members Only
5.14.26 - Sequoia-Backed Founder, Repeat YC Founders, and Nectar Social’s 1st Engineer
Turnkey’s co-founder and ex-Coinbase Custody product lead, repeat YC founders acquired by Multiverse, Nectar Social’s 1st engineer, and Exaforce’s engineering lead
Cybersecurity
Members Only
6.11.26 - The Mistral Mafia
Mistral's former Chief Business Officer, researchers from OpenAI and DeepMind, a healthcare AI founder from Morpho, and repeat engineering leaders behind multiple acquisitions
Members Only
6.8.26 - Top Founders of the Week
The co-founders of Luma AI, Liftoff, Basis, Lila Sciences, Forage, Impulse Space's COO and first technical hire, and founders acquired by DriveNets
Members Only
6.5.26 - 9 Figure Repeat Founder, Founders of Opals, and Zyphra Engineering Executives
A $133M founder, Opal's co-founder, CTO, and CPO, engineering executives from Zyphra, and builders behind exits to Airwallex, Harness, and Salesforce
SaaS
Members Only
8.4.26 - The Airtable Mafia
Former Airtable CTOs, GMs, founding leaders, and acquired founders.
Members Only
8.1.26 – K2 Space Leaders, Repeat Tiger-Backed Founder, and Boring Company Operators
K2 Space supply chain and product leaders, a Tiger-backed repeat founder, Domo's former Chief Security Officer, and early Boring Company builders.
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
Robotics
Members Only
8.21.26 - Top Founders of the Week
Simile’s 1st hire and 5th MTS, Gravis Robotics’ co-founder, Higgsfield’s founding research talent, Fish Audio’s co-founders and founding engineer, Neros’ former COO, and Paradigm’s 1st employee & GP.
Members Only
8.17.26 - Founders & Early Builders from Higgsfield, Simile, Gravis Robotics & SkyPilot
Higgsfield’s founding researcher, Simile’s 1st hire and 5th MTS, a Gravis Robotics co-founder, and SkyPilot talent building YC-backed Tokenless.
Members Only
8.2.26 - Founding leaders from Forward and Segment, DroneDeploy-acquired Founders, and early builders from Cognition's latest acquisition.
Co-founders of Forward and Segment, whose founders now lead Foundational Industries and Revoy, building again plus DroneDeploy founders and early builders from Cognition's latest acquisition starting new.
American Dynamism
Members Only
8.21.26 - Top Founders of the Week
Simile’s 1st hire and 5th MTS, Gravis Robotics’ co-founder, Higgsfield’s founding research talent, Fish Audio’s co-founders and founding engineer, Neros’ former COO, and Paradigm’s 1st employee & GP.
Members Only
8.19.26 - Physical-World Founders from Hadrian’s Engineering Ranks + Form Energy’s VP Eng, Interim CFO & Early Leaders
Hadrian engineering, product, and manufacturing talent, plus Form Energy’s former VP Engineering, 2nd finance hire & interim CFO, and battery leaders building newcos.
Members Only
8.18.26 - Fish Audio & Palona AI Co-Founders + Neros COO & SpaceX Alum
Two Fish Audio co-founders and its founding engineer, Neros’ former COO and SpaceX veteran, plus Palona AI’s co-founding engineering lead building newco.