Get Access

Discovering Tomorrow's PayPal Mafia Today

Highlighting founders emerging from top startups

Read by investors managing $100B+ AUM. Limited to 200 members.

Top Posts

View all
8.30.26 - Top Founders of the Week
Members Only
Top Founders of the Week

8.30.26 - Top Founders of the Week

Perplexity’s earliest engineers and acquired founders, Blue Origin’s original team and SpaceX veterans, plus Hugging Face’s founding research crew and research leads spinning out.
8.24.26 - The Perplexity Mafia
Members Only
Perplexity

8.24.26 - The Perplexity Mafia

Perplexity’s Comet browser builders, 1st SWE & growth engineer, consumer experience lead, and acquired founders leaving to build new AI, agent, robotics, and consumer startups.
8.14.26 - Top Founders of the Week
Members Only
Top Founders of the Week

8.14.26 - Top Founders of the Week

2.6.26 - Top Founders of the Week
Members Only
Autonomous Driving

2.6.26 - Top Founders of the Week

12 Repeat Founders, Co-Creator of Veo, and Founding Engineer of Parallel Web Systems
2.5.26 - Repeat Founders Backed by Khosla & Bessemer in Stealth
Members Only
Crypto

2.5.26 - Repeat Founders Backed by Khosla & Bessemer in Stealth

Former Drift, Turnstile, Machina Labs, Second Measure founders, alongside operators from Goodfire, TRM Labs, and Fibr
2.4.26 - Repeat Founders with $200M Exit, USV-Backed Founder, and Celestial AI's CTO
Members Only
Founding Engineer

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.
2.3.26 - The Waymo Mafia
Members Only
Founder

2.3.26 - The Waymo Mafia

Waymo’s Co-Founder, Senior Autonomy, Perception, and Systems Leaders
2.2.26 - Poetiq + Kaia Health Founders and Founding Engineers from Fieldguide, Concourse, and RobCo
Members Only
Frontier AI

2.2.26 - Poetiq + Kaia Health Founders and Founding Engineers from Fieldguide, Concourse, and RobCo

Poetiq’s co-founder, Kaia Health’s founding team post-acquisition, and early engineers from Fieldguide, Concourse, and RobCo.
1.30.26 - Top Founders of the Week
Members Only
Rogo

1.30.26 - Top Founders of the Week

Brex’s co-founder, founding engineers, and first MLE; Farcaster’s co-founders post-acquisition; and early product and engineering leaders from Rogo, Phia, and Waabi.
1.29.26 - The Farcaster Mafia + Early Members from Outtake, Zocks, and Mine
Members Only
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
Members Only
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.
1.27.26 - The World Labs & Synthesia Mafias + The Early Blockit Team
Members Only
Blockit

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.
1.26.26 - The Brex Mafia
Members Only
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.
1.23.26 - Top Founders of The Week
Members Only
ClickHouse

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.
1.22.26 - Cosmos Founder Starting Anew and The Anchorage & BitGo Mafias
Members Only
Crypto

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

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

Repeat Founder

View all
9.16.25 - The ElevenLabs Mafia
Members Only
ElevenLabs

9.16.25 - The ElevenLabs Mafia

ElevenLabs’ early team, voice agents engineering lead, 1st intern and AI researchers spinning out alongside OpenAI Codex and Higgsfield founding talent building again.
9.15.26- Greylock-Backed Physical AI Co-Founder + Factory AI Infra Head & Savvy Wealth Founding Engineers
Members Only
Greylock

9.15.26- Greylock-Backed Physical AI Co-Founder + Factory AI Infra Head & Savvy Wealth Founding Engineers

Antioch’s co-founder, Factory’s AI infrastructure and technical talent, Savvy Wealth’s founding and 6th engineers, plus early Clarion and Manus builders launching newcos.
9.10.26 Top Founders of the Week
Members Only
Top Founders of the Week

9.10.26 Top Founders of the Week

Cognition’s engineers and researchers, Clay’s 1st and 5th employees, Wonderful’s former GM & Lokalise founder, and Unacademy’s co-founder & CTO starting new

Founding Engineer

View all
9.15.26- Greylock-Backed Physical AI Co-Founder + Factory AI Infra Head & Savvy Wealth Founding Engineers
Members Only
Greylock

9.15.26- Greylock-Backed Physical AI Co-Founder + Factory AI Infra Head & Savvy Wealth Founding Engineers

Antioch’s co-founder, Factory’s AI infrastructure and technical talent, Savvy Wealth’s founding and 6th engineers, plus early Clarion and Manus builders launching newcos.
9.10.26 Top Founders of the Week
Members Only
Top Founders of the Week

9.10.26 Top Founders of the Week

Cognition’s engineers and researchers, Clay’s 1st and 5th employees, Wonderful’s former GM & Lokalise founder, and Unacademy’s co-founder & CTO starting new
9.9.26 - The Mach Industries Mafia
Members Only
Sequoia

9.9.26 - The Mach Industries Mafia

Mach’s founding engineers, first manufacturing & supply chain leader, VP Engineering and integrated systems head spinning out to build across defense, aerospace, subsea robotics and consumer hardware.

Repeat Founding Engineer

View all
9.16.25 - The ElevenLabs Mafia
Members Only
ElevenLabs

9.16.25 - The ElevenLabs Mafia

ElevenLabs’ early team, voice agents engineering lead, 1st intern and AI researchers spinning out alongside OpenAI Codex and Higgsfield founding talent building again.
9.14.26 - Open-Weight AI Unicorn Founder, Thatch’s 15th FTE, and Adaptive’s Founding Product Head
Members Only
A16Z

9.14.26 - Open-Weight AI Unicorn Founder, Thatch’s 15th FTE, and Adaptive’s Founding Product Head

Arcee AI’s co-founder & CTO and Head of AI Engineering, Thatch’s early engineer and platforms GTM lead, plus Adaptive’s founding Head of Product & Strategy building again.
9.8.26 - The Harvey Mafia
Members Only
Harvey

9.8.26 - The Harvey Mafia

Harvey’s founding AI engineering leader, VP Engineering, Head of Security and acquired Mirage founders, plus early product, design and research talent building again.

AI

View all
9.15.26- Greylock-Backed Physical AI Co-Founder + Factory AI Infra Head & Savvy Wealth Founding Engineers
Members Only
Greylock

9.15.26- Greylock-Backed Physical AI Co-Founder + Factory AI Infra Head & Savvy Wealth Founding Engineers

Antioch’s co-founder, Factory’s AI infrastructure and technical talent, Savvy Wealth’s founding and 6th engineers, plus early Clarion and Manus builders launching newcos.
9.14.26 - Open-Weight AI Unicorn Founder, Thatch’s 15th FTE, and Adaptive’s Founding Product Head
Members Only
A16Z

9.14.26 - Open-Weight AI Unicorn Founder, Thatch’s 15th FTE, and Adaptive’s Founding Product Head

Arcee AI’s co-founder & CTO and Head of AI Engineering, Thatch’s early engineer and platforms GTM lead, plus Adaptive’s founding Head of Product & Strategy building again.
9.10.26 Top Founders of the Week
Members Only
Top Founders of the Week

9.10.26 Top Founders of the Week

Cognition’s engineers and researchers, Clay’s 1st and 5th employees, Wonderful’s former GM & Lokalise founder, and Unacademy’s co-founder & CTO starting new

Applied AI

View all
9.15.26- Greylock-Backed Physical AI Co-Founder + Factory AI Infra Head & Savvy Wealth Founding Engineers
Members Only
Greylock

9.15.26- Greylock-Backed Physical AI Co-Founder + Factory AI Infra Head & Savvy Wealth Founding Engineers

Antioch’s co-founder, Factory’s AI infrastructure and technical talent, Savvy Wealth’s founding and 6th engineers, plus early Clarion and Manus builders launching newcos.
9.14.26 - Open-Weight AI Unicorn Founder, Thatch’s 15th FTE, and Adaptive’s Founding Product Head
Members Only
A16Z

9.14.26 - Open-Weight AI Unicorn Founder, Thatch’s 15th FTE, and Adaptive’s Founding Product Head

Arcee AI’s co-founder & CTO and Head of AI Engineering, Thatch’s early engineer and platforms GTM lead, plus Adaptive’s founding Head of Product & Strategy building again.
9.8.26 - The Harvey Mafia
Members Only
Harvey

9.8.26 - The Harvey Mafia

Harvey’s founding AI engineering leader, VP Engineering, Head of Security and acquired Mirage founders, plus early product, design and research talent building again.

Fintech

View all
9.15.26- Greylock-Backed Physical AI Co-Founder + Factory AI Infra Head & Savvy Wealth Founding Engineers
Members Only
Greylock

9.15.26- Greylock-Backed Physical AI Co-Founder + Factory AI Infra Head & Savvy Wealth Founding Engineers

Antioch’s co-founder, Factory’s AI infrastructure and technical talent, Savvy Wealth’s founding and 6th engineers, plus early Clarion and Manus builders launching newcos.
7.14.26 - NEA-Backed Founder in Stealth, Founding Engineers of Hadrius, and Neko Growth Leaders
Members Only
Neko

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.
7.13.26 - Top Founders of the Week
Members Only
Chai Discovery

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.

Infrastructure

View all
9.4.26 - SoftBank-Backed Co-Founder & Early Engineer + $30B Crusoe’s VP Eng & Infra Leaders
Members Only
Crusoe

9.4.26 - SoftBank-Backed Co-Founder & Early Engineer + $30B Crusoe’s VP Eng & Infra Leaders

Unacademy’s co-founder & CTO and early technical talent, alongside Crusoe’s VP Engineering, cloud infrastructure director and distributed computing engineers building new AI infrastructure companies.
8.20.26 - Paradigm’s 1st Employee, Partners & VP Eng + Early Heroku, Privy & Multiverse Leaders
Members Only
Benchmark

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.
8.2.26 - Founding leaders from Forward and Segment, DroneDeploy-acquired Founders, and early builders from Cognition's latest acquisition.
Members Only
Repeat Founder

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.

Defense

View all
7.19.26 - Top Founders of the Week
Members Only
Top Founders of the Week

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.
7.15.26 - The Helsing Mafia
Members Only
Helsing

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.
7.9.26 - Peregrine's Deployment Team & CRED's Founding Product Leaders
Members Only
Peregrine

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

View all
7.31.26 - Function’s Co-Founding CTO, Antora’s CFO & Sequoia-Backed Summer Health Co-Founder
Members Only
A16Z

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
7.28.26 - Top Founders of the Week
Members Only
Top Founders of the Week

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
7.26.26 - Co-Founders of Fluidstack’s Co-Founders & Colossal Biosciences
Members Only
Fluidstack

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

View all
9.15.26- Greylock-Backed Physical AI Co-Founder + Factory AI Infra Head & Savvy Wealth Founding Engineers
Members Only
Greylock

9.15.26- Greylock-Backed Physical AI Co-Founder + Factory AI Infra Head & Savvy Wealth Founding Engineers

Antioch’s co-founder, Factory’s AI infrastructure and technical talent, Savvy Wealth’s founding and 6th engineers, plus early Clarion and Manus builders launching newcos.
9.14.26 - Open-Weight AI Unicorn Founder, Thatch’s 15th FTE, and Adaptive’s Founding Product Head
Members Only
A16Z

9.14.26 - Open-Weight AI Unicorn Founder, Thatch’s 15th FTE, and Adaptive’s Founding Product Head

Arcee AI’s co-founder & CTO and Head of AI Engineering, Thatch’s early engineer and platforms GTM lead, plus Adaptive’s founding Head of Product & Strategy building again.
8.20.26 - Paradigm’s 1st Employee, Partners & VP Eng + Early Heroku, Privy & Multiverse Leaders
Members Only
Benchmark

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.

Crypto

View all
8.21.26 - Top Founders of the Week
Members Only
Top Founders of the Week

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.
6.11.26 - The Mistral Mafia
Members Only
Mistral

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
5.14.26 - Sequoia-Backed Founder, Repeat YC Founders, and Nectar Social’s 1st Engineer
Members Only
Founder

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

View all
6.11.26 - The Mistral Mafia
Members Only
Mistral

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
6.8.26 - Top Founders of the Week
Members Only
Top Founders of the Week

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
6.5.26 - 9 Figure Repeat Founder, Founders of Opals, and Zyphra Engineering Executives
Members Only
Greylock

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

View all
9.10.26 Top Founders of the Week
Members Only
Top Founders of the Week

9.10.26 Top Founders of the Week

Cognition’s engineers and researchers, Clay’s 1st and 5th employees, Wonderful’s former GM & Lokalise founder, and Unacademy’s co-founder & CTO starting new
8.31.26 - The Clay Mafia
Members Only
SaaS

8.31.26 - The Clay Mafia

Clay’s 1st and 5th employees, 1st marketing hire, early growth and engineering leaders spinning out to build across AI, fintech, healthcare, and physical sciences.
8.4.26 - The Airtable Mafia
Members Only
Airtable

8.4.26 - The Airtable Mafia

Former Airtable CTOs, GMs, founding leaders, and acquired founders.

Robotics

View all
8.21.26 - Top Founders of the Week
Members Only
Top Founders of the Week

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.
8.17.26 - Founders & Early Builders from Higgsfield, Simile, Gravis Robotics & SkyPilot
Members Only
DST

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.
8.2.26 - Founding leaders from Forward and Segment, DroneDeploy-acquired Founders, and early builders from Cognition's latest acquisition.
Members Only
Repeat Founder

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

View all
9.9.26 - The Mach Industries Mafia
Members Only
Sequoia

9.9.26 - The Mach Industries Mafia

Mach’s founding engineers, first manufacturing & supply chain leader, VP Engineering and integrated systems head spinning out to build across defense, aerospace, subsea robotics and consumer hardware.
9.3.26 - First Round-Backed Co-Founder + HiddenLayer Founding Engineer and Repeat Founders from Wonderful AI
Members Only
Wonderful

9.3.26 - First Round-Backed Co-Founder + HiddenLayer Founding Engineer and Repeat Founders from Wonderful AI

Aranya co-founder, HiddenLayer founding engineer, and Wonderful’s former Baltic GM, Argentina & Chile CTO, and Palantir-trained CTO Office leader building again.
8.30.26 - Top Founders of the Week
Members Only
Top Founders of the Week

8.30.26 - Top Founders of the Week

Perplexity’s earliest engineers and acquired founders, Blue Origin’s original team and SpaceX veterans, plus Hugging Face’s founding research crew and research leads spinning out.