fifty-five, site of the day
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the data agency


The Internet generates titanic volumes of data: behavioural, commercial, advertising… Such data have become essential to understanding user needs and develop a smarter marketing approach. Yet, connected devices and communication channels are multiplying and changing so fast that harnessing the power of innumerable data streams has become an incredibly delicate task.

fifty-five helps you collect and organise your data, to let you monitor and optimise the performance of your digital assets and acquire and retain customers more efficiently.


Our customers

  • McDonalds's McDonalds's


  • Danone Danone


  • Air France Air France

    Air France

  • Se Loger Se Loger

    Se Loger

  • Axa Axa


  • Renault Nissan Renault Nissan

    Renault Nissan

  • Oscaro Oscaro


  • Darty Darty


  • L'Oréal L'Oréal


  • Carrefour Carrefour


  • Google Google




  • Crédit Agricole Crédit Agricole

    Crédit Agricole

  • PSA Peugeot Citröen PSA Peugeot Citröen

    PSA Peugeot Citröen

  • Lacoste Lacoste


  • 3 Suisses 3 Suisses

    3 Suisses

  • Pages Jaunes Pages Jaunes

    Pages Jaunes

  • Ferrero Ferrero


  • Bouygues Bouygues


  • François Hollande 2012 François Hollande 2012

    François Hollande 2012

  • Le Crédit Lyonnais Le Crédit Lyonnais

    Le Crédit Lyonnais

  • Accor Accor


  • BNP Parisbas BNP Parisbas

    BNP Parisbas

  • Badoo Badoo


  • HP HP


  • Richemont Richemont




Download our case studies

  • Mercure
  • Ferrero – Kinder
  • Ferrero
  • PagesJaunes
  • B&B Hôtels
  • Air France
  • Lacoste
  • Smartbox
  • Vente-privé
  • Pimkie
  • Delamaison

How can we use web analytics data to improve the website’s global performance?

Industry verticals

  • Automotive

    • Citroën
    • Dacia
    • Elite Auto
    • Oscaro
    • Peugeot
    • Renault
    See all Close
  • Cosmetics

    • Beauté-Privée
    • Biotherm
    • Clarisonic
    • Lancôme
    • L'Occitane en Provence
    • L'Oréal
    See all Close
  • Food

    • Bel
    • Danone
    • Ferrero
    • McDonald's
  • Banking, Insurance & Finance

    • AXA
    • AXA Family Protect
    • BNP Paribas
    • Carrefour Banque
    • Cétélem
    • La Mutuelle Générale
    • LCL
    • MAIF
    • MMA
    • Sofinco-Finaref
    See all Close
  • Luxury

    • Adamence
    • Armani
    • Balenciaga
    • Baume & Mercier
    • Boucheron
    • IWC
    • Jaeger Le Coultre
    • Mont Blanc
    • Panerai
    • Piaget
    • Puig
    • Roger Dubuis
    • Saint Laurent
    • Van Cleef & Arpels
    • Vacheron Constantin
    See all Close
  • Media, Local & Entertainment

    • Badoo
    • Bouygues Immobilier
    • Bouygues Télécom Régie
    • Efficity
    • Fotolia
    • Google MEEL
    • La Fourchette
    • Le Monde
    • Ouest France
    • PagesJaunes
    • Quotatis
    • Smartbox
    • Solocal
    • Vivastreet
    See all Close
  • Retail

    • 3 Suisses
    • Darty
    • Delamaison
    • Lacoste
    • Maisons du Monde
    • Pimkie
    • Pixmania
    • Quelle
    • Vente-Privée
    See all Close
  • Healthcare, Energy & Government

    • Actiris
    • EDF
    • François Hollande 2012
    • Pfizer
    • Schneider Electric
    See all Close
  • Technology

    • Bouygues Télécom
    • Hewlett Packard
    • OVH
    • SFR
  • Travel

    • Accor
    • Air France
    • B&B Hôtels
    • Ibis
    • Mercure
    • Pierre & Vacances Adagio
    • Pierre & Vacances Village Club
    • Pullman Hôtels
    • Sofitel
    • Voyage-privé
    See all Close

About Us


We help advertisers leverage their data to increase business performance and adopt a smarter marketing approach. We provide services and software solutions to help them through project completion.

As data volumes are surging, our ability to process highly diverse formats and huge data sets has never grown so fast. Our habits are deeply transformed by what we call “Big Data”. Properly harnessed, the data deluge can mean greater efficiency and considerable time and cost savings.

55% of people entering a store will walk out having purchased something.

On the internet, this conversion rate falls to 2.1%

As estimated by Google and Kantar Media for French e-commerce in April 2013

fifty-five helps you collect and organise your data, to let you monitor and optimise the performance of your digital assets and acquire and retain customers more efficiently.
Read more about our solutions and services.

Innovative company

fifty-five is a certified “Jeune Entreprise Innovante” (Young Innovative Company) and is supported by OSEO, the French agency for Innovation and SME development. Together with 2,000 other carefully selected start-ups, fifty-five is a member of the Oseo Excellence network. We design solutions to meet marketers’ needs with powerful yet simple software: dashboard, data visualisation tools and data products.

Our milestones

  • fifty-five is
    officially launched

  • 10th employee

  • Member of Oseo Excellence and “Jeune Entreprise Innovante”

  • fifty-five starts doing media-buying

  • Google Analytics Premium launched in France, fifty-five is a certified partner

  • 55th employee

  • Our mining platform is launched,
    after 3 years of R&D

  • Our London office is open!

The team

Co-founded by former Google executives in 2010, fifty-five is the combination of four trades: software integration, consulting services, SaaS development and digital media-buying.
We provide innovative services and solutions to help advertisers develop smarter marketing approaches: optimise site and user experiences, improve acquisition strategy and enrich customer knowledge.

Marketing strategy, digital media-buying, tracking, web analytics, data mining, statistics and machine learning, data visualisation, engineering… Our team brings together a unique mix of complementary skills, all dedicated to improving your marketing.

Read more about the co-founders Back to the team
  • Olivier Banizette Olivier Banizette Olivier Banizette

    After graduating from the École des Mines, Olivier discovered marketing at HEC Paris. Before joining fifty-five, he launched a startup dedicated to sustainable development.

    Olivier Banizette Data Project Lead
  • Damien Duhamel Damien Duhamel Damien Duhamel

    After studying Digital Design, Damien started as a UI / UX designer. He then discovered web development and naturally ended up joining fifty-five as a front-end developer.

    Damien Duhamel R&D Engineer
  • Mats Carduner Mats Carduner Mats Carduner

    Mats has over 20 years experience in the Internet industry. After graduating from HEC Paris, he started out in marketing at L'Oréal. He was Google's Managing Director for Southern Europe from 2004 to 2010.

    Mats Carduner Co-founder, CEO
  • Charles Grosperrin Charles Grosperrin Charles Grosperrin

    Charles is an organic yoghurt. His great taste makes him a great snack. As an ESSEC student and being rich in probiotics, his lactic virtues serve but one purpose: optimise your web traffic.

    Charles Grosperrin Data Analyst Associate
  • Morgan Morty Morgan Morty Morgan Morty

    Graduating with a degree in Brand Strategy, Morgan worked for ad and web agencies. He developed his passion for digital media from his experiences in Montreal and Shanghai before joining 55.

    Morgan Morty Media Specialist
  • Nicolas Beauchesne Nicolas Beauchesne Nicolas Beauchesne

    Nicolas started at Vivendi Universal, before moving on to Photoways. A graduate from ESCP-Europe, he becomes Head of the YouTube & Display team at Google, before co-founding fifty-five.

    Nicolas Beauchesne Co-founder, Managing Director
  • Cédric Delzenne Cédric Delzenne Cédric Delzenne

    After graduating from EDHEC, with stints in Sao Paulo, DC, and SF, Cédric settled down in Hong Kong in 2010. Creator of the local chapter of the Founder Institute, Cedric leads 55's journey in Asia. Zai Tien!

    Cédric Delzenne Consulting Manager Hong Kong
  • Charlotte Fretti Charlotte Fretti Charlotte Fretti

    Graduating from Telecom Bretagne, Charlotte spent over 8 years in a consulting firm specialised in Telecom, Media & Internet. She joined fifty-five in 2014 to lead the Business Operations team.

    Charlotte Fretti Head of Business Operations
  • Khalid Mehl Khalid Mehl Khalid Mehl

    After graduating from Ecole Polytechnique and ENPC, Khalid spent 3 years as a business analyst for Les 3 Suisses' board. He joined fifty-five to dive into the depths of data and turn bytes into gold.

    Khalid Mehl Data Scientist
  • Pierre Harand Pierre Harand Pierre Harand

    During his 10+ years experience, Pierre held leadership positions in marketing, sales, and strategy at companies such Microsoft and Canal+. He is a Polytechnique and Telecom Paris graduate.

    Pierre Harand Director, Consulting and Business Development
  • Edouard Hocdé Edouard Hocdé Edouard Hocdé

    Edouard worked at Fnac and Accor before joining us. Not only is he an FBS graduate, he was also trained in a gastronomic restaurant while studying Tourism, so he can help you select a good vintage wine!

    Edouard Hocdé Senior Data Analyst
  • Maxime Nadarassin Maxime Nadarassin Maxime Nadarassin

    A final year student at HETIC, Maxime is a web analytics enthusiast who also loves to do weights. He is currently polishing his tag implementation skills in our Data Insights department.

    Maxime Nadarassin Senior Tag Specialist
  • You've got talent? You've got talent? You've got talent?

    If you are passionate about the internet revolution, digital marketing and big data, if you are creative yet methodic, always eager to learn and build, take a look at our job openings!

    You've got talent? Come and join us!
  • Igor Voitenko Igor Voitenko Igor Voitenko

    Igor holds a degree from the National University of Kharkiv and an M.S. in decision and statistical science. A talented piano player, he's also an analytics expert.

    Igor Voitenko Analytics Expert
  • Lan Anh Vu Hong Lan Anh Vu Hong Lan Anh Vu Hong

    With multiple degrees from prestigious institutions (ENS Cachan, HEC Paris), this enthusiastic linguist started working at Google in Sydney before joining fifty-five in its early days.

    Lan Anh Vu Hong Senior Sales Marketing Specialist Senior
  • Audrey Hické Audrey Hické Audrey Hické

    Audrey graduated from HEC Paris, started her career at Facebook Dublin, made a move to entrepreneurship before understanding that data was to rule her world – pretty surprising for a former Arts student.

    Audrey Hické Senior Data Analyst
  • Marwa Jalili Marwa Jalili Marwa Jalili

    After graduating with a B.A. in Communication and HR in Morocco, Marwa set out to conquer the Eiffel Tower with an M.A. from INSEEC. Freshly graduated, she joined the fifty-five family in 2014.

    Marwa Jalili Media Specialist
  • Cyril Cottin Cyril Cottin Cyril Cottin

    This young Savoyard graduate from IUT Technolac is passionate about the web and complex systems. Convinced that "Data is the New Oil", he used to work in a gas station.

    Cyril Cottin Tag Specialist
  • Lamiae Taibi Lamiae Taibi Lamiae Taibi

    A HEC Paris graduate, Lamiae started working in the financial sector before launching a Rocket Internet company in Morocco. Then the craving for digital continued and she joined us in 2013.

    Lamiae Taibi Data Analyst
  • Julie-Anne Negiar Julie-Anne Negiar Julie-Anne Negiar

    An ESSEC graduate and an avid runner, she first went to Malaysia with Rocket-Internet. She then joined an auditing firm in France, before discovering the magic number 55.

    Julie-Anne Negiar Data Analyst
  • Moulay Idriss Alaoui Moulay Idriss Alaoui Moulay Idriss Alaoui

    This recreational skydiver took the deep dive into Big Data in New York. He graduated from Columbia University and Ecole des Mines then worked for Accor before joining fifty-five.

    Moulay Idriss Alaoui CRM Project Lead
  • Milena Da Costa Milena Da Costa Milena Da Costa

    Don't ask why Milena would rather live in France than in her home country of Brazil. She holds a Master's Degree in International Management and worked in e-marketing before joining our trading desk in 2014.

    Milena Da Costa Media Specialist
  • Jean-François Wassong Jean-François Wassong Jean-François Wassong

    From Autonomy to Verity, EDF to Google, Jeff's faith into the most exciting web technologies has never faltered. Today he leads our stellar cast of engineers in search for data of the purest quality.

    Jean-François Wassong Chief Technical Officer
  • Mathieu Arnaud Mathieu Arnaud Mathieu Arnaud

    Holding a degree in Game Design & Programming, Arnaud started as a web dev in video games. Passionate about R&D and technical challenges, he's been thrilled to discover the world of data at 55.

    Mathieu Arnaud R&D Engineer
  • Jean-Baptiste Touyarot Jean-Baptiste Touyarot Jean-Baptiste Touyarot

    An EM Lyon graduate, Jean-Baptiste started as a consultant for Accenture in Paris then NYC. A huge rugby fan, he broke the line to join fifty-five and the big data field in 2014.

    Jean-Baptiste Touyarot Data Project Lead
  • Robin Bonduelle Robin Bonduelle Robin Bonduelle

    Robin left his cherished hometown of Toulouse to work at Rocket Internet in Brazil, before joining our consulting team. He has graduated from both HEC Paris and Law School, and he's a fearless swimmer.

    Robin Bonduelle Data Analyst
  • Quentin Marques Quentin Marques Quentin Marques

    After spending some time in a media agency working on Microsoft and Bacardi Martini digital accounts, this ECS Paris graduate joined 55 to work on tagging needs.

    Quentin Marques Tag Specialist
  • Camille Giard Camille Giard Camille Giard

    After graduating from ESCP-Europe, Camille entered the digital world at PSA. Always eager to learn more about consumers' online habits, she joined fifty-five's media team.

    Camille Giard Senior Data Analyst
  • Elie Ziani Elie Ziani Elie Ziani

    This HEC Paris graduate cut his teeth working as an M&A analyst and in corporate finance in Dubai. At L'Oréal, Elie started in digital marketing, which led him to join 55's consulting teams.

    Elie Ziani Data Analyst
  • Claire Plisson Claire Plisson Claire Plisson

    As a HEC graduate with a passion for cinema, Claire spent a year working in the Media & Entertainment industry, before specialising in managing new technologies.

    Claire Plisson Business Operations Analyst Associate
  • Romain Warlop Romain Warlop Romain Warlop

    Soon to graduate from ENS Cachan in Applied Mathematics, Romain joined fifty-five to build predictive models, eat bananas, and play foosball.

    Romain Warlop Data Scientist
  • Léa Prunier Léa Prunier Léa Prunier

    After playing around with glitter at L'Oréal, Léa decided to explore the world of data at fifty-five. She's a student at ESSEC, where she discovered go-karting; give her a chance and she'll turbocharge your data.

    Léa Prunier Data Analyst Associate
  • Léa Berthelot Léa Berthelot Léa Berthelot

    After graduating from ESCP Europe, Léa started her career as a new biz consultant at Dentsu Aegis Network. Convinced that ponies, lolcats and data will define the future, she joined fifty-five.

    Léa Berthelot Senior Data Analyst
  • Benoît  Rojare Benoît  Rojare Benoît  Rojare

    After graduating from ENSAM and ESSEC, Benoît spent over two years in Asia in strategy consulting and finance before coming back home to join our consulting team.

    Benoît Rojare Senior Data Analyst
  • Mohammed Hajlaoui Mohammed Hajlaoui Mohammed Hajlaoui

    As an ENSI graduate, Med created many different mobile apps for many different clients, reaching 30+ apps published on the AppStore. He joined our R&D team to develop our mobile offer.

    Mohammed Hajlaoui R&D Engineer
  • Alan Boydell Alan Boydell Alan Boydell

    This Scottish academic holds 2 M.A.s and co-wrote the first French user guide to Google Analytics. After leaving Google and a short stop at Keyade, he co-founded fifty-five.

    Alan Boydell Co-founder, Data Insights & Analytics Director
  • Douglas Willcocks Douglas Willcocks Douglas Willcocks

    An Imperial College graduate and currently a student at HEC, this former data scientist spent time in IBM's labs in California and working on cloud strategies in London before turning towards marketing at fifty-five.

    Douglas Willcocks Marketing Associate
  • Sigbjørn Dybdahl Sigbjørn Dybdahl Sigbjørn Dybdahl

    After several years working in the telecommunications sector, Sigbjørn joined fifty-five's R&D team to develop our real-time solutions, as well as to reinforce the bike team.

    Sigbjørn Dybdahl Technical Project Manager
  • Louis Chavane de Dalmassy Louis Chavane de Dalmassy Louis Chavane de Dalmassy

    After graduating from Télécom Paristech, Louis worked for Klee Performance and conducted research into social networks for the French Ministry of Defence before joining us in early 2011.

    Louis Chavane de Dalmassy Product Manager
  • Jean Neltner Jean Neltner Jean Neltner

    Lycos, Infonie, Egg then Google, where he was Head of Strategic Partenerships for Southern Europe: the Internet has no secrets for Jean.

    Jean Neltner Co-founder, Managing Director
  • Ian Cockayne Ian Cockayne Ian Cockayne

    Ian worked for 16 years in a technical web agency in Liverpool, England as both Trainer and then Digital Strategist. He likes making websites pay for themselves, just like fifty-five.

    Ian Cockayne Analytics Expert
  • Fabrice Dumas Fabrice Dumas Fabrice Dumas

    A HEC graduate, he cut his teeth at Arthur Andersen before working for AREVA and discovering Silicon Valley. Wanting to live the startup life in the heart of Paris, he joined the fifty-five adventure!

    Fabrice Dumas CFO
  • Kristina Bennett Kristina Bennett Kristina Bennett

    A graduate from the University of Sydney, Kristina founded an eCommerce website before joining IBM where she discovered her passion for Big Data, eager to learn more she joined fifty-five.

    Kristina Bennett Senior Data Analyst
  • +
    fifty-five is hiring
  • Alexandre David Alexandre David Alexandre David

    As an EPFL graduate, Alexandre cut his teeth at Sony where he discovered the power of machine learning. Swept up by data, he continued his studies at Télécom ParisTech before becoming a data scientist at 55.

    Alexandre David Data Science Associate
  • Mathilde Bauret Mathilde Bauret Mathilde Bauret

    After 10 years in French equity sales at Deutsche Bank, Mathilde decided to downsize to smaller companies: Titouan Lamazou, Wincomparator, then finally she joined fifty-five as our super-hero.

    Mathilde Bauret Senior Administrative and Financial Officer
  • Pei Zhang Pei Zhang Pei Zhang

    Pei worked 5 years at Keyade as SEM & Training Manager before joining fifty-five. She holds a degree in French literature from Sun Yat-sen University (Guangzhou) and a Masters in Economics.

    Pei Zhang Senior Media Technologies Manager, SEM & Display
  • Simon Camuzet Simon Camuzet Simon Camuzet

    Simon holds a degree in Economics from ENS Cachan and started working as an economist at Total E&P before joining Matiro to lead the R&D team on Real-Time Bidding technologies (RTB).

    Simon Camuzet Media Technologies Specialist, Display RTB
  • Hugo Loriot Hugo Loriot Hugo Loriot

    Hugo graduated from EM Lyon and joined Google's Sales then Operations teams. We're not sure where he's the most qualified: digital media, wrestling, or quaint forgotten music hits?

    Hugo Loriot Media Technologies Director
  • Marjorie Leloup Marjorie Leloup Marjorie Leloup

    After 6 years spent at AT Internet, Marjorie joined fifty-five to improve her Web Analytics skills. A great horse rider, she will get your technical teams galloping.

    Marjorie Leloup Senior Analytics Expert
  • Jérôme Rastoldo Jérôme Rastoldo Jérôme Rastoldo

    After graduating from ESSEC, Jérôme worked at Warner Music, Orange and L'Atelier BNP in San Francisco before joining fifty-five.

    Jérôme Rastoldo Senior Data Analyst
  • Sean O'Shea Sean O'Shea Sean O'Shea

    After three years studying the French electrical network, Sean decided to start it over and switched to IT in 2012. A fervent adept of mountaineering, he hopes to climb the highest peaks of data!

    Sean O'Shea R&D Engineer Associate
  • Ruben Ohayon Ruben Ohayon Ruben Ohayon

    Ruben or Benjamin Button, gets younger every day. This youthful engineer, passionate about new technology, was inevitably attracted by big data, so he joined 55.

    Ruben Ohayon Tag Specialist Associate
  • Céline  Craipeau Céline  Craipeau Céline  Craipeau

    A graduate from Sciences-Po, Céline tries her hand at being a stretegic planner associate first, and an assistant advertising manager then. That jazz lover finally joins fifty-five in 2014, here is what really matters.

    Céline Craipeau Data Analyst
  • Serge Descombes Serge Descombes Serge Descombes

    After 5 years at Google, Serge co-wrote the 1st French book on Google Analytics and co-founded Wasabi Analytics. He joined fifty-five in 2010 and is now head of the data collection team.

    Serge Descombes Senior Data Insights Manager
  • Mohamed Ali Bardi Mohamed Ali Bardi Mohamed Ali Bardi

    Graduating from INSAT Tunis, Mohamed Ali joined 55 after demonstrating his skills during an internship. Despite his passion for soccer, he didn't make it past the 1/4 finals of our foosball world cup.

    Mohamed Ali Bardi R&D Engineer
  • Vasyl Vaskul Vasyl Vaskul Vasyl Vaskul

    A talented guitar player who speaks 4 languages, Vasyl, holds an MS in I.T. from Kiev and a post-masters degree from Science Po Paris. And guess what, he's a nice guy.

    Vasyl Vaskul Technical Project Manager
  • Laurent Senesi Laurent Senesi Laurent Senesi

    Laurent spent many years at Keyade before becoming Director of Search at KR Media. This kung-fu fighter and accomplished yogi joined fifty-five in 2011 to develop the Media offer.

    Laurent Senesi Media Technologies Manager, SEM & Social
  • Mathilde Giroud Mathilde Giroud Mathilde Giroud

    After several jobs in Marketing, including one in Brazil where she learned Portuguese, Mathilde developed a passion for tech. Gaining a Masters in Web Marketing, she joined 55 as a Media Specialist.

    Mathilde Giroud Media Specialist
  • Adrien Ledoux Adrien Ledoux Adrien Ledoux

    Cradled by technology from his early years, Adrien joined the Trading Desk team at 55 after a successful internship in Search. His passion, backpack roadtrips.

    Adrien Ledoux Media Specialist
  • Antoine Le Nôtre Antoine Le Nôtre Antoine Le Nôtre

    Antoine is an ISEP graduate. He started his career at Sopragroup, then went to IBM Business Consulting Services in the banking industry, in the CRM and BI departments.

    Antoine Le Nôtre Senior Program Manager
  • Michaël Surleraux Michaël Surleraux Michaël Surleraux

    Michael spent his childhood doodling imaginary worlds. He discovered reality at ESSEC and now, after working at the Centre Pompidou and in London, he sketches the future of analytics at 55

    Michaël Surleraux Data Analyst Associate
  • Joséphine Mangenot Joséphine Mangenot Joséphine Mangenot

    A Graduate from Skema Business School, Joséphine worked at Canal+ and Orange before joining us. To make it short, she has 2 loves: badminton and data.

    Joséphine Mangenot Data Analyst
  • Luc Charpentier Luc Charpentier Luc Charpentier

    Formerly a globe-trotting gendarme, Luc has switched from the penal code to source code. He's now a student at the 42 engineering school, and is sailing the high-seas of data.

    Luc Charpentier R&D Engineer Associate
  • Guillaume Coulomb Guillaume Coulomb Guillaume Coulomb

    Guillaume used to have 2 passions: web technology and innovation. After graduating from Supaéro, he joined fifty-five's consulting team to develop two new hobbies: analytics and foosball competitions.

    Guillaume Coulomb Data Analyst
  • Eurydice Lafferayrie Eurydice Lafferayrie Eurydice Lafferayrie

    From Paris to San Francisco, from print to web and mobile publishing, Eurydice roamed the world wide web before joining the consulting team in 2013. She's a HEC Paris graduate.

    Eurydice Lafferayrie Data Analyst
  • Gautier Méric Gautier Méric Gautier Méric

    Gautier is an EDHEC graduate. He first started at Ernst&Young. Then his faith into web analytics led him to join fifty-five's consulting team.

    Gautier Méric Senior Data Analyst
  • François Costa de Beauregard François Costa de Beauregard François Costa de Beauregard

    A graduate from Sciences-Po Paris, François worked at L'Oréal, Google, then Keyade in the early days. He then co-founded fifty-five, where he works magic. Which is to be expected, since he's a magician.

    François Costa de Beauregard Senior Manager, Data Consulting
  • Xiaoyan Le Xiaoyan Le Xiaoyan Le

    After 5 years' experience at L'Oréal and LVMH, this former visual merchandising expert has found new challenges switching from physical to digital retail, and expanding from Asia to global markets.

    Xiaoyan Le Data Analyst
  • Antoine Barczewski Antoine Barczewski Antoine Barczewski

    Antoine used to work in advertising, but don't think that's where he started growing a beard. It all began when he switched to market finance. He switched back just in time, but kept the beard.

    Antoine Barczewski Data Analyst
  • Camille Gaume Camille Gaume Camille Gaume

    After graduating from EDHEC, Camille took her first steps in web tech in London, then went to L'Occitane in Bresil, before ending up at 55. This theatre-lover plays all the parts to meet your analytics needs.

    Camille Gaume Data Analyst Associate
  • Gwenn Charlot Gwenn Charlot Gwenn Charlot

    An ESSEC graduate and a keen basketball player, Gwenn made a slam dunk when she came to work at 55. She warmed herself up working in marketing, first at an e-merchant and then at Nestlé.

    Gwenn Charlot Data Analyst
  • Geneviève Métayer Geneviève Métayer Geneviève Métayer

    Geneviève started at Garnier before flying off to Australia to work in strategic marketing at Sodexo. She studied at HEC Paris and she plays the double bass.

    Geneviève Métayer Data Analyst
  • Zhibo Shan Zhibo Shan Zhibo Shan

    Zhibo, a computer science graduate from JILIN university, came to France to study multimedia at UFC. Now he's a JS integrator associate at 55 where he always finds someone to play basketball and DOTA.

    Zhibo Shan Tag Specialist
  • Meng Li Meng Li Meng Li

    After graduating from the Beijing University of Technology, Meng completed his education at EFREI in Paris. He's been part of the Product team since 2010.

    Meng Li Senior R&D Engineer
  • Réda El Mghazli Réda El Mghazli Réda El Mghazli

    Working at ADIT on business modelling missions, this HEC Paris & Telecom ParisTech alumnus gained an acute knowledge of e-retail, which he puts to good use as a data analyst at 55.

    Réda El Mghazli Senior Data Analyst
  • Ginette Cardenas Ginette Cardenas Ginette Cardenas

    Ginette is from Venezuela, but Spanish is her only language. This polyglot holds an M.A. in Languages & European Management and lived in the U.S. & Germany before settling down with us at 55.

    Ginette Cardenas SEA Specialist
  • Huikan Xiang Huikan Xiang Huikan Xiang

    A Telecom Paristech and Beijing University of Telecommunication graduate, Huikan is passionate about big data. She's been with us since 2011.

    Huikan Xiang Senior R&D Engineer
  • Aurélie Jourde Aurélie Jourde Aurélie Jourde

    After graduating from EM Lyon, Aurélie spent 6 years working in Marketing before joining the UX team at Fnac. Convinced that only big data and the Beatles will save the world, she joined 55.

    Aurélie Jourde Data Project Lead
  • Elodie Mepa Elodie Mepa Elodie Mepa

    Currently studying at ESAM, Elodie started in finance in India and China before joining 55. Of Vietnamese, Moroccan, South-African, and Amerindian ancestry, she takes 55 all over the world.

    Elodie Mepa Administrative and Financial Associate
  • Issam Idjerouidene Issam Idjerouidene Issam Idjerouidene

    With degrees from ENSAM and Edinburgh University, this keen swimmer dived into his entrepreneurial adventures by founding Trustfer, before turning his attention to the vast digital oceans at fifty-five.

    Issam Idjerouidene Data Analyst
  • Marie-Adeline Puzin Marie-Adeline Puzin Marie-Adeline Puzin

    Telecoms, media, insurance... Marie-Adeline has worked as a consultant in a myriad of industries and organisations, from small NGOs to Capgemini. She graduated from Dauphine.

    Marie-Adeline Puzin Consulting Manager
  • Camille Cosnefroy Camille Cosnefroy Camille Cosnefroy

    After spending some time in an advertising agency, Camille joined Google's sales then marketing teams. He is a graduate from Paris Dauphine, and he specialised in Digital Media.

    Camille Cosnefroy Data Analyst
  • Baptiste Le Moine Baptiste Le Moine Baptiste Le Moine

    This technology veteran was around for the millenium’s first wave of tech startups, he even remembers using Netscape and Napster. He now puts all this experience to good use at fifty-five

    Baptiste Le Moine R&D Engineer
  • Nicolas Aucher Nicolas Aucher Nicolas Aucher

    After working in the UK, USA, Indonesia and Canada, Nicolas (ECN 2000) came back to his roots and joined our Data Insights team as an expert on the Adobe suite.

    Nicolas Aucher Senior Data Insights Manager
  • Paul Lefkopoulos Paul Lefkopoulos Paul Lefkopoulos

    After graduating from ENSAE and HEC, Paul sharpened his statistics and marketing skills at BETC Digital. At fifty-five, he unleashes the hidden power of data.

    Paul Lefkopoulos Data Science Lead
  • Maria Rubio Maria Rubio Maria Rubio

    Maria, a pint-sized ESCP student from Colombia, started work at AdopteUnMec before finding her true love, big data, at 55

    Maria Rubio Data Analyst Associate
  • Annabelle Morand Annabelle Morand Annabelle Morand

    Annabelle cut her teeth working at Proximity, MRM, and Isobar before becoming SVP at iProspect (Dentus Aegis Network). Originally from Chamonix, she'll move mountains for fifty-five.

    Annabelle Morand Head of Media Programs
  • Jérémy Moreira Caldas Jérémy Moreira Caldas Jérémy Moreira Caldas

    Following an internship at Mesagraph, Jérémy graduated from Cranfield University where he studied technical computing and distributed systems. He joined the R&D table football team at 55.

    Jérémy Moreira Caldas R&D Engineer
  • Kevin Mathon Kevin Mathon Kevin Mathon

    After working in consulting and webmarketing, this INSEEC marketing graduate joined our media team in 2013.

    Kevin Mathon Media Specialist
  • Arnaud Massonnie Arnaud Massonnie Arnaud Massonnie

    Arnaud worked at Havas & Monster before joining Google as Director of Strategy & Operations for Southern Europe from 2005 to 2010. fifty-five is the #3 start-up he founded.

    Arnaud Massonnie Co-founder, Managing Director
  • Paul Gallavardin Paul Gallavardin Paul Gallavardin

    From 5 years working as a consultant, this bearded man has kept a sense of commitment, and a love for cufflinks. Paul fell in love with Digital Analytics just as he fell for board games in his childhood.

    Paul Gallavardin Senior Analytics Expert
  • Kim Tran Kim Tran Kim Tran

    A former consultant for IBM in the retail banking sector, Kim joined fifty-five in the early years. Her background includes Advanced Computing at Imperial College and E-Business at HEC Business School.

    Kim Tran Head of Consulting, UK
  • Hippolyte Martin Hippolyte Martin Hippolyte Martin

    Hippolyte started working at PayPal and in the start-up scene before joining fifty-five's Business Operations team. This HEC Paris graduate aims to bring the agency's soccer team to the top.

    Hippolyte Martin Business Operations Analyst
  • Hichem Karoui Hichem Karoui Hichem Karoui

    Hichem started in strategy consulting at OC&C after graduating from Centrale Paris. Fond of diving, he took a leap and plunged into data in 2013.

    Hichem Karoui Data Project Lead
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  • Nicolas Beauchesne Nicolas Beauchesne
    Nicolas Beauchesne Managing Director, Business Development & Staffing

    Over ten years in the Internet sector turned Nicolas into an expert in new ad formats and e-commerce. He started at Vivendi Universal after graduating from ESCP Europe, before becoming Deputy Executive Director at He then joined Google, where he developed the Adwords program in the media and entertainment sector, before becoming Head of Media Solutions to coordinate the launch of the YouTube and Google Display program.

  • Alan Boydell Alan Boydell
    Alan Boydell Data Insights Director

    In his many years as Google Analytics Manager for Southern Europe, Alan became a well-recognized expert in web analytics and testing. This Scottish academic with two M.A.s to his name is the author of the blog “The Analytics Factor”, and co-wrote the first French user guide for Google Analytics (Pearson 2012). He left Google to found Keymetrics, Keyade’s branch specialized in web analytics and testing before co-founding fifty-five.

  • Mats Carduner Mats Carduner
    Mats Carduner CEO

    Mats's journey online began in 1995: after working at L’Oréal in the Consumer Division, he joined Infonie, Havas Interactive Publishing, Monster, and then Google, where he was Managing Director for France & Southern Europe from 2004 to 2010. These busy years did not weaken his taste for entrepreneurship; in addition to fifty-five, this HEC Paris graduate also co-founded Coopt In, a social network later sold to Le Figaro group.

  • François Costa de Beauregard François Costa de Beauregard
    François Costa de Beauregard Program Manager

    After graduating from Sciences-Po Paris and Paris Dauphine University, François started working at L’Oréal before changing careers and joining Google where he was in charge of the retail accounts. He then put his expertise in SEM and web analytics to the service of Keyade and participated in the creation of Keymetrics, the agency branch specialized in web analytics and web testing.

  • Antoine Denoix Antoine Denoix
    Antoine Denoix Program Manager

    After graduating from HEC Paris, Antoine started working in the insurance sector before joining the Entertainment company Pathé. He then became part of the YouTube and Display team at Google and wrote a book on affiliate programs: L’Affiliation : bâtir, administrer et réussir un programme efficace (Dunod 2010). Drawing on his consulting experience at fifty-five, he published a second book: Webanalyse, des données à l'action (Dunod 2013).

  • Arnaud Massonnie Arnaud Massonnie
    Arnaud Massonnie Managing Director, Engineering, Product & Operations

    Arnaud started working at Havas Interactive, the Vivendi group’s internet lab, before becoming’s Marketing Director in France. He then developed De Agostini Atlas’s e-learning division. During these busy years, this tireless EDHEC Business School graduate also managed to found 2 start-ups, including a social network later sold to Le Figaro group. In 2005, he joined Google to be Head of Sales Operations for Southern Europe.

  • Jean Neltner Jean Neltner
    Jean Neltner Managing Director, Business Development & Partnerships

    A true expert in online business development, Jean has worked in all sectors: finance, technology, CPG, B2B, etc. Before co-founding fifty-five, this EM Lyon Business School alumnus participated in the rapid growth of the Internet sector as Business Development Director at Lycos, Infonie and Egg. He then became Head of Strategic Partnerships for Southern Europe at Google, where he met his future partners.

News & Events


  • Big Data Paris – 2015 edition

    Our CTO Jean-François Wassong and Data Scientist Khalid Mehl will present how we do "Data Processing for Data Products" at 55. Don't miss their talk on 10 March at 4.50 pm, in the Expert track! This year, the conference will be opened by French Minister of State for Digital Affairs Axelle Lemaire. Other remarkable keynote speakers include the founder of Hadoop, Doug Cutting. More information on the official website.
  • EBG conference: CRM meets media

    55 will host a conference in Paris on the convergence of CRM and media, together with Turn. Come and hear Marie-Laure Cassé, Digital Marketing Director at and Bruce Hoang, Data Intelligence Projects Director at Orange share their stories. More information on the EBG's website.
  • EBG workshop: real-time marketing scenarios

    fifty-five will host a workshop in Paris with IBM on how Big data is making advanced real time marketing scenarios possible: how we can combine geolocalisation, mobile usage and content personalisation. More information on the EBG's website.
  • Jean Neltner at 01 Business Forum

    Don't miss on the event co-organised by Orange Business Services and BFM Business on "How to successfully transition to the digital era". Speakers include the CEOs of Orange and Uber, the founder of Blablacar, Google's VP for SEEMEA and more. Jean Neltner, MD and co-founder at 55 will speak with Murielle Caillau, Digital Director at Nuxe on how Big Data and Analytics are changing the face of business.
    More information on the event's website.
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