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Romain Sestier

Founder

Founder at StackOne

San Francisco Bay Area

FoundedStackOne

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92 people in our graph share verified history with Romain — schools, employers, funds. One of them is your warm intro.

Hector MasonunlockedRomain: together at StackOne (2023–2026)
×11Romain: together at Royal Holloway, University of London

About

Romain Sestier is the co-founder and CEO of StackOne, a company building integration infrastructure for AI agents that raised a $20M Series A led by GV with participation from Workday Ventures. He previously worked at Google, served as VP Product & Services at Yieldify (acquired by Publicis Groupe) where he managed 70 people, co-founded the AI data analytics company Upper.ai, and was the second employee at ContentSquare, opening its first UK office. His work spans SaaS product development across San Francisco, London, and Paris.

Founder at StackOne

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In turn, Romain can intro founders to StackOne's investors below.

StackOne's investors · 6

Episode1London · $317.5K – $2.5M checks · since 2024GV (Google Ventures)Mountain View · $250K – $50M checksInception Fund$110K – $1.1M checksPlayfair CapitalLondon · $130K – $1.9M checksPreston-Werner VenturesSan Francisco Bay Area · $500K – $3M checksWorkday VenturesSan Francisco · since 2025

Experience

  1. StackOneCo-founder & CEOcurrent2023 — present
  2. GoogleCo-founder and Product lead @ Area120 (Google Labs)2021 — 2023San Francisco Bay Area
  3. GoogleLead Product Manager, Ads Sales Intelligence2020 — 2021San Francisco Bay Area
  4. YieldifyVP Product & Services2019London Area, United Kingdom
  5. YieldifyHead of Product2018 — 2019Greater London, England, United Kingdom
  6. YieldifyHead of Data2018Greater London, England, United Kingdom
  7. Upper.aiCo-founder & CEO2016 — 2019Greater London, England, United Kingdom
  8. ContentSquareHead of UK Professional Services2016Greater London, England, United Kingdom
  9. Maxymiser (acquired by Oracle)Digital Optimisation Consultant2015 — 2016Greater London, England, United Kingdom
  10. Maxymiser (acquired by Oracle)Senior Digital Analyst2014 — 2015Greater London, England, United Kingdom
  11. Maxymiser (acquired by Oracle)Digital Optimisation Analyst2014Greater London, England, United Kingdom
  12. The Hackett GroupFinance Transformation Consulting Intern2013Greater London, England, United Kingdom
  13. WABCOProduct & Marketing Strategy Internship (APAC)2012Shanghai, China

Skills & more

Strategy19Strategic Planning4Leadership8JavaScript1jQuery1HTML5CSSPHPGoogle Analytics6SQL2CMSMVT2
+12 moreA/B TestingMultivariate TestingE-commerce OptimizationWeb AnalyticsData AnalysisConversion OptimizationE-commerce ConsultingData Driven TestingData-driven Decision MakingCXOE-commerceData-driven Marketing

Languages English · French

  • Google Analytics Certified — Google
  • Maxymiser Technical Training — Maxymiser

From Romain's professional profile.

Frequently asked questions

Who is Romain Sestier?
Romain Sestier is the co-founder and CEO of StackOne, a company building integration infrastructure for AI agents that raised a $20M Series A led by GV with participation from Workday Ventures. He previously worked at Google, served as VP Product & Services at Yieldify (acquired by Publicis Groupe) where he managed 70 people, co-founded the AI data analytics company Upper.ai, and was the second employee at ContentSquare, opening its first UK office. His work spans SaaS product development across San Francisco, London, and Paris.
Where does Romain Sestier work?
Romain Sestier is Founder of StackOne.
What companies did Romain Sestier found?
Romain Sestier founded StackOne.
Where did Romain Sestier go to school?
Romain Sestier studied at Royal Holloway, University of London (Business Management & Marketing).

Founder mafias

Contentsquare mafia2

Also came through, then founded or led a company.

Eve HalimiStrategic Project AssociateFounded Alinea

Same school

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