Romain Sestier

CEO

San Francisco, California, United States11 yrs 11 mos experience

Most Likely To SwitchHighly Stable

Key Highlights

Raised $20M Series A for StackOne.
Built a $0 to $1B product at Google in 18 months.
Led global teams of 70 at Yieldify.

Stackforce AI infers this person is a SaaS product leader with extensive experience in AI and data-driven solutions.

Contact

Skills

Other Skills

A/B TestingMultivariate TestingE-commerce OptimizationWeb AnalyticsData AnalysisConversion OptimizationE-commerce ConsultingData Driven TestingData-driven Decision MakingOmnitureSiteCatalystCXOCROJavaScriptjQuery

About

I'm the co-founder and CEO of StackOne — the integration infrastructure for AI agents. We raised a $20M Series A led by GV (Google Ventures) with Workday Ventures, and we're building the connective layer that lets AI agents actually do useful work inside enterprise tools. Before StackOne, I spent a decade building and scaling SaaS products across SF, London, and Paris: - Led the creation of a $0-to-$1B product in 18 months at Google - Managed 70 people globally as VP Product & Services at Yieldify (acquired by Publicis Groupe) - Co-founded Upper.ai — an AI-powered data analyst - Opened ContentSquare's first international office as employee #2 in the UK I write about AI-native software, agentic infrastructure, and what it takes to build category-defining companies. Always happy to connect with founders, operators, and anyone rethinking how software is built.

Experience

Stackone

Co-founder & CEO

Jan 2023 – Present · 3 yrs 3 mos

StackOne is the integration infrastructure for AI agents. We've built a proprietary AI engine that writes deep, production-ready integrations — and exposes them through API, MCP, A2A, and SDK interfaces so AI agents can connect to the tools businesses already use.
$20M Series A led by GV (Google Ventures), with Workday Ventures, XTX Ventures, and angels from OpenAI, DeepMind, and Microsoft.

Google

2 roles

Co-founder and Product lead @ Area120 (Google Labs)

Promoted

Oct 2021 – Jan 2023 · 1 yr 3 mos · San Francisco Bay Area

As co-founder, I led the inception, pitch, creation, and absorption into Google Shopping of an AI powered business intelligence tool.

Lead Product Manager, Ads Sales Intelligence

Jan 2020 – Oct 2021 · 1 yr 9 mos · San Francisco Bay Area

Led the creation of a 0->$1b product within 18 months.

Yieldify

3 roles

VP Product & Services

Promoted

Apr 2019 – Dec 2019 · 8 mos

I led 70 people globally across Product, Services, Engineering, and Technical services. I was responsible for overall product strategy and customer success. Drove a 30% growth in upsells and NDR in 2 years.
Yieldify was acquired in December 2022 by Publicis Groupe.

Head of Product

Nov 2018 – Apr 2019 · 5 mos

Head of Data

Feb 2018 – Nov 2018 · 9 mos

Upper.ai

Co-founder & CEO

Aug 2016 – Dec 2019 · 3 yrs 4 mos · London, United Kingdom

Co-founded and grew the venture to $100k revenue.
Upper.ai: an AI data analyst that makes it really easy to access insights from all your existing data so you can make more data-driven decisions.
Alongside the product, we offered data & digital optimization services under the Charlie Romeo Oscar agency brand.

Contentsquare

Head of UK Professional Services

Mar 2016 – Oct 2016 · 7 mos · London, United Kingdom

Opened the first office outside of the home market (France) as employee #2 in the UK.

Maxymiser (acquired by oracle)

3 roles

Digital Optimisation Consultant

Promoted

Apr 2015 – Mar 2016 · 11 mos · London, United Kingdom

Responsible for client strategy, customer success, data analysis, and pre-sales support.
Grew my flagship account to become the largest in EMEA in 18 months.
I was the fastest-promoted from Analyst to Consultant, and became the youngest consultant in the company.

Senior Digital Analyst

Promoted

Dec 2014 – Mar 2015 · 3 mos · London, United Kingdom

Digital Optimisation Analyst

Jun 2014 – Dec 2014 · 6 mos · London, United Kingdom

The hackett group

Finance Transformation Consulting Intern

Jun 2013 – Sep 2013 · 3 mos · London, United Kingdom

Led the implementation of a new data and knowledge management system used by over 1500 employees worldwide to create benchmarks of Finance & Operations processes.

Wabco

Product & Marketing Strategy Internship (APAC)

Jun 2012 – Sep 2012 · 3 mos · Shanghai, China

Led the foundational market research for Tire-Pressure Monitoring Systems (TPMS), leading to the successful introduction of a new line of product in the Chinese market.