About
Guillaume Genthial is CTO at Fragment, a platform serving operations teams in financial services and insurance. He previously led AI initiatives at a KYC provider and held engineering roles focused on large language models in healthcare, recommendation systems at Criteo, and optical character recognition.
Founder at FragmentYC S23
Intro paths
Guillaume went through Y Combinator (Summer 2023) — any YC alum in your network can reach them through the YC community.
Their group partner at YC was Aaron Epstein, General Partner at Y Combinator — the partner who ran Fragment's batch and knows the company first-hand. YC profile ↗
In turn, Guillaume can intro founders to Fragment's investors below.
Fragment's investors · 1
Co-founders at Fragment
Experience
- SierraAgent Engineercurrent2026 — present
- Fragment (YC S23)Co-founder & CTO2023 — 2026
- MetaMapAI Lead2021 — 2022Paris, Île-de-France, France
- Criteo AI LabSenior Machine Learning Engineer2019 — 2021Paris, Île-de-France, France
- Roam AnalyticsNLP Engineer2018 — 2020San Mateo
- Stanford Machine Learning GroupResearch Assistant2017 — 2018
- Stanford UniversityCourse Assistant2017 — 2018
- ProxemResearch Intern2016Greater Paris Metropolitan Region
- OptionWeb Developer2015Santiago de Chile
- Marine NationaleInternship2013 — 2014French Navy, patrol boat La Capricieuse, French Guyana, The Caribbean.
Skills & more
+12 more
Natural Language ProcessingIntelligence artificielleDeep LearningAIApplied MathematicsMathématiques appliquéesStatistical LearningApprentissage automatiqueModélisation financièreBig dataPhysiquePhilosophieLanguages Allemand · Anglais · Espagnol · Français
From Guillaume's professional profile.
Frequently asked questions
- Who is Guillaume Genthial?
- Guillaume Genthial is CTO at Fragment, a platform serving operations teams in financial services and insurance. He previously led AI initiatives at a KYC provider and held engineering roles focused on large language models in healthcare, recommendation systems at Criteo, and optical character recognition.
- Where does Guillaume Genthial work?
- Guillaume Genthial is Founder of Fragment.
- What companies did Guillaume Genthial found?
- Guillaume Genthial founded Fragment.
- Where did Guillaume Genthial go to school?
- Guillaume Genthial studied at Stanford University (Master of Science (M.Sc.), Computational and Mathematical Engineering); École Polytechnique (Master of Science (M.Sc.), Applied Mathematics); University of Paris I: Panthéon-Sorbonne (Licence 3, Philosophie).
Founder mafias
Y Combinator mafia8,773
Also came through, then founded or led a company.
+ 8,766 more
Stanford University mafia903
Also came through, then founded or led a company.
+ 896 more
École Polytechnique mafia70
Also came through, then founded or led a company.
+ 63 more
Lycée Sainte-Geneviève mafia20
Also came through, then founded or led a company.
+ 13 more
University of Paris I: Panthéon-Sorbonne mafia13
Also came through, then founded or led a company.
+ 6 more
Same school
Also attended Stanford University2,000
+ 1,994 more
Also attended École Polytechnique161
+ 155 more
Also attended University of Paris I: Panthéon-Sorbonne115
+ 109 more
Also attended Lycée Sainte Geneviève46
+ 40 more
Shared employers
Also worked at MetaMap2
Also worked at Criteo AI Lab15
+ 9 more
Also worked at Roam Analytics3
Also worked at Stanford University722
+ 716 more






















































