About
Moncef Djafri attended Polytechnique and later studied at Stanford. He is building Stockline.
Founder at StocklineYC S25
Intro paths
YC
Moncef went through Y Combinator (Summer 2025) — any YC alum in your network can reach them through the YC community.
GP
Their group partner at YC was Brad Flora, Backing expeditions into the future — the partner who ran Stockline's batch and knows the company first-hand. YC profile ↗
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In turn, Moncef can intro founders to Stockline's investors below.
Stockline's investors · 4
Co-founders at Stockline
MO
Mariem Ould IsmailFounder
Experience
- Stockline (YC S25)Co-Foundercurrent2025 — present
- New York UniversityResearch Intern2025
- Boston Consulting Group (BCG)Visiting Associate2024
- Lycée HocheTeacher Assistant2023 — 2024
- Armée de TerreDeputy Platoon Leader2022 — 2023
Skills & more
Languages Anglais · Arabe · Espagnol · Français · Portugais
From Moncef's professional profile.
Frequently asked questions
- Who is Moncef Djafri?
- Moncef Djafri attended Polytechnique and later studied at Stanford. He is building Stockline.
- Where does Moncef Djafri work?
- Moncef Djafri is Founder of Stockline.
- What companies did Moncef Djafri found?
- Moncef Djafri founded Stockline.
- Where did Moncef Djafri go to school?
- Moncef Djafri studied at Stanford University; Y Combinator; École Polytechnique (Applied Mathematics and CS).
Founder mafias
Y Combinator mafia8,773
Also came through, then founded or led a company.
Sam AltmanPresidentFounded Tools for Humanity +3Jessica LivingstonCo-founderFounded Y CombinatorAlexis OhanianYC Summer 2005Founded RedditFred EhrsamYC Summer 2012Founded Nudge +1Matt HuangYC Winter 2011Founded HotspotsTrae StephensYC Winter 2022Founded Pursuit +1
+ 8,766 more
Y Combinator mafia4,716
Also came through, then founded or led a company.
Ryan SheaEntrepreneurshipFounded StacksTarek MansourFounded KalshiSuhail DoshiEating beans & riceFounded Playground +1Subomi OluwalanaW22Founded ConvoyDarius "Bubs" MonsefS19Founded Sightbox +3Matthew ScholzFounded Oisin Biotechnologies +3
+ 4,709 more
Stanford University mafia903
Also came through, then founded or led a company.
Peter ThielJ.D.Founded PayPal +1Reid HoffmanB.S.Founded LinkedIn +2Joe LonsdaleBSFounded Opto +3Mike Maples JrBSFounded Pattern BreakersSteve JurvetsonMSEEFounded Mojo VisionBalaji SrinivasanGraduate StudentFounded Counsyl +1
+ 896 more
École Polytechnique mafia70
Also came through, then founded or led a company.
Arthur MenschMaster of ScienceFounded Mistral AIThomas WolfFounded Hugging FaceRodolphe ArdantPhysicsFounded SpendeskMatt RouifB.SFounded Photoroom +3Anne OsdoitMaster of Science (MS)Founded Moon Surgical +2Jean Yves StephanIngénieur de l'Ecole Polytechnique (Master's degree)Founded Data Mechanics +1
+ 63 more
Lycée Hoche mafia7
Also came through, then founded or led a company.
Nadir TitaFounded HeroHugues Pouillot2009Founded DashblockMartin GouyStudent in preparatory classes in MPSI then MPFounded ArtifactClaire GouzeClasse préparatoire ECSFounded nao LabsJulien CatonnetBaccalauréat ES- option mathématiquesFounded KlaimeeOmar DekkicheClasse préparatoire Maths SupFounded Amatera
Same school
Also attended Stanford University2,000
Peter ThielCo-founder & Partner at Founders FundReid HoffmanCo-founder of LinkedIn; Partner at GreylockDavid SacksCo-founder & General Partner at Craft Ventures; former White House AI & Crypto CzarKeith RaboisManaging Director at Khosla VenturesGarry TanPresident & CEO of Y CombinatorAlfred LinPartner at Sequoia Capital
+ 1,994 more
Also attended Y Combinator2,000
Tarek MansourCo-founder & CEO of KalshiSuhail DoshiFounder of Mixpanel; founder of ParticleSubomi OluwalanaCo-founder & CEO of ConvoyArhaan A.Deeptech Fellow at Clear VenturesMaroof AhmedFounder at Octopus VenturesJustin SwartPartner at Bitkraft Esports Ventures
+ 1,994 more
Also attended École Polytechnique161
Arthur MenschCo-founder & CEO of Mistral AIThomas WolfCo-founder & Chief Science Officer of Hugging FaceRodolphe ArdantFounder & President of SpendeskCyriac ParisotInvestor at Index VenturesPauline BoucherInvestor at DaphniMichal NatoraSenior Investment Director - Industrial IT & Robotics at Emerald Technology Ventures Ag
+ 155 more
Shared employers
Also worked at Stockline (YC S25)1
Also worked at New York University93
Ankita TiwariPrograms Manager at StartXUri LopatinInvestor at Khosla VenturesDoug BandVenture Partner at AlleyCorpNour ObeidallahHead of Community at AlleyCorpAnne DordaiHead of Portfolio and Platform at Wavemaker Three-Sixty HealthEmma StoneVice President at Enable Ventures
+ 87 more
Also worked at Boston Consulting Group (BCG)907
David SzeAdvisory Partner at GreylockDave MunichielloInvestor at GV (Google Ventures)Massimo PrelzInvestor at DN CapitalRasmus AreskougInvestor at DN CapitalRiccardo MontiOperating Advisor at P101 VenturesAntonio TurroniOperating Advisor at P101 Ventures
+ 901 more
