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.
Education
- Stanford UniversityMaster of Science (M.Sc.), Computational and Mathematical Engineering2016 — 2018
- École PolytechniqueMaster of Science (M.Sc.), Applied Mathematics2013 — 2017
- University of Paris I: Panthéon-SorbonneLicence 3, Philosophie2014 — 2015
- Lycée Sainte GenevièveCPGE, Maths - Physique - Informatique2011 — 2013
Skills & more
+12 more
Natural Language ProcessingIntelligence artificielleDeep LearningAIApplied MathematicsMathématiques appliquéesStatistical LearningApprentissage automatiqueModélisation financièreBig dataPhysiquePhilosophieLanguages Allemand · Anglais · Espagnol · Français
From Guillaume's professional profile.
Same school
Also attended Stanford University1,726
+ 1,720 more
Also attended École Polytechnique97
+ 91 more
Also attended University of Paris I: Panthéon-Sorbonne94
+ 88 more
Shared employers
Also worked at MetaMap3
Also worked at Criteo AI Lab10
+ 4 more
Also worked at Roam Analytics2
Also worked at Stanford University458
+ 452 more




























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