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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

Ferrero Cookie Consent
  • Ferrero Cookie Consent
  • PagesJaunes
  • B&B Hôtels
  • MMA
  • Air France
  • Lacoste
  • PagesJaunes
  • Smartbox
  • Vente-privé
  • Pimkie
  • Delamaison

How can we collect user data and be transparent about our using cookies ?

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
    • Orange
    • OVH
    • SFR
    See all Close
  • 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
  • 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
  • Lan Anh Vu Hong Lan Anh Vu Hong Lan Anh Vu Hong

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

    Lan Anh Vu Hong Sales Marketing Specialist Senior
  • Mathilde Bauret Mathilde Bauret Mathilde Bauret

    After 10 years as French equity sales at Deutsche Bank, Mathilde decided to downsize to smaller companies. Titouan Lamazou, Wincomparator... before joining fifty-five as our super-hero.

    Mathilde Bauret Office manager | Senior admin. & financial manager
  • 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
  • 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
  • Antoine Le Nôtre Antoine Le Nôtre Antoine Le Nôtre

    Antoine started at Sopragroup, then IBM Business Consulting Services for the banking industry, in the CRM and BI departments. He's an ISEP graduate.

    Antoine Le Nôtre Senior Program Manager
  • +
    fifty-five is hiring
  • Olivier Banizette Olivier Banizette Olivier Banizette

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

    Olivier Banizette Data Project Lead
  • Lydia Bel Hadj amor Lydia Bel Hadj amor Lydia Bel Hadj amor

    Lydia is passionate about ancient Egypt. She joined fifty-five to learn how to decipher the hieroglyphs of web analytics logs and media tags. She will graduate from Telecom Management School next year.

    Lydia Bel Hadj amor Data Analyst Associate
  • Sean O'Shea Sean O'Shea Sean O'Shea

    After 3 years studying the French electrical network, Sean decides to start it over and switches to IT. A fervent adept of mountaineering, he hopes to climb the highest peaks of Big Data!

    Sean O'Shea Tag Specialist
  • Laurent Edel Laurent Edel Laurent Edel

    A Google APIs and SEM expert, Laurent co-founded Click2sales (Pôle Nord Vivaki). He holds an IT Engineering degree from CNAM and is fond of "sauce samouraï". Ever heard of that?

    Laurent Edel Senior Project Manager
  • Benjamin Donsez Benjamin Donsez Benjamin Donsez

    A graduate from ESSEC, Benjamin worked in the media industry (TFI, Fox Pathé & Universal Pictures) and produced a short film before joining fifty-five in 2010.

    Benjamin Donsez Manager, Data Consulting
  • 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 Tag Specialist
  • 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
  • Ismaël Sow Ismaël Sow Ismaël Sow

    A graduate in Communication and Digital technology from CELSA, Ismael is a Yahoo! alumni who joined fifty-five in 2013 as a tag specialist. Speaks Internet fluently.

    Ismaël Sow Tag Specialist
  • 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 work on social networks for the French Ministry of Defence before joining us early 2011.

    Louis Chavane de Dalmassy Product Manager
  • 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 Data Analyst Senior
  • Clément Pinon Clément Pinon Clément Pinon

    Convinced that data can provide powerful insights, Clément joined fifty-five after graduating from Ecole Centrale de Lyon and Columbia University with a Master of Science.

    Clément Pinon Data Project Lead
  • Meng Li Meng Li Meng Li

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

    Meng Li R&D Engineer Lead
  • 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
  • Huikan Xiang Huikan Xiang Huikan Xiang

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

    Huikan Xiang R&D Engineer
  • 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
  • Jean-François Wassong Jean-François Wassong Jean-François Wassong

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

    Jean-François Wassong Chief Technical Officer
  • 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-master degree from Science Po Paris. And guess what, he's a nice guy.

    Vasyl Vaskul Technical Project Manager
  • Hallvard Geslin Hallvard Geslin Hallvard Geslin

    We're not sure whether we're more impressed with Hallvard's skills with numbers or with a basket ball. He joined the data science team while completing his double degree at ENSAE and ESSEC.

    Hallvard Geslin Data Scientist Associate
  • Pierre Harand Pierre Harand Pierre Harand

    Along his 10+ year experience, Pierre held leadership positions in marketing, sales and strategy at companies like Microsoft and Canal+. He graduated from Polytechnique and Telecom Paris.

    Pierre Harand Director, Consulting and Business Development
  • 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 Master in Economy.

    Pei Zhang Senior Media Technologies Manager | SEM & Display
  • Matthieu de Vivie Matthieu de Vivie Matthieu de Vivie

    Graduated from ENSIMAG, Mathieu started as data product manager at Weborama. A player at heart, he's always ready for a chess or foosball game.

    Matthieu de Vivie Product Operations Manager
  • Edouard Hocdé Edouard Hocdé Edouard Hocdé

    Edouard worked at and Accor before joining us. An FBS graduate, he was trained in a gastronomic restaurant while studying Tourism, and can thus help you select a good vintage wine!

    Edouard Hocdé Data Analyst Senior
  • Nitharjan Kanagarajah Nitharjan Kanagarajah Nitharjan Kanagarajah

    A true web native, Nitharjan is passionate about new technologies. Freshly graduated from IUT Villetaneuse, Nitharjan joined fifty-five as a tag specialist.

    Nitharjan Kanagarajah Tag 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
  • Louise-Anne Raimbault Louise-Anne Raimbault Louise-Anne Raimbault

    Louise-Anne worked at Prisma Media and Blackdivine before joining fifty-five. A graduate from ESCP-Europe, she holds an M.A. in History and an Iranian Studies Degree. Yes, she speaks Farsi!

    Louise-Anne Raimbault Data Analyst
  • Antoine Barczewski Antoine Barczewski Antoine Barczewski

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

    Antoine Barczewski Data Analyst Associate
  • 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!
  • 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. A HEC Paris graduat, he aims to bring the agency's soccer team to the top.

    Hippolyte Martin Business Operations Analyst
  • Guillaume Coulomb Guillaume Coulomb Guillaume Coulomb

    Guillaume had 2 passions: web technologies and innovation. A graduate from Supaéro, he joined fifty-five's consulting team to develop two new hobbies: Analytics and competition foosball.

    Guillaume Coulomb Data Analyst
  • Reda El Mghazli Reda El Mghazli Reda El Mghazli

    Working at ADIT and with investors on business modeling missions, this HEC Paris & Telecom ParisTech alumni gained an acute knowledge of e-retail, which he puts to good use as a Conversion & Media Analyst.

    Reda El Mghazli Data Analyst Senior
  • Adrien Béata Adrien Béata Adrien Béata

    A short experience in the finance sector convinced this HEC Paris alumni that the future lies in algorithms and data - which naturally led him to join fifty-five.

    Adrien Béata Data Analyst Senior
  • Mats Carduner Mats Carduner Mats Carduner

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

    Mats Carduner Co-founder, CEO
  • Nicolas Maillard Nicolas Maillard Nicolas Maillard

    An active HUG member, Nicolas's our big data champion. Specialised in optimisation & real-time, he spent some time at Stanford where he caught the start-up fever: Yoono, Qwam... and fifty-five.

    Nicolas Maillard Technical Project Manager - Real-Time
  • Jérôme Rastoldo Jérôme Rastoldo Jérôme Rastoldo

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

    Jérôme Rastoldo Data Analyst Senior
  • 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. Normal, since he's a magician.

    François Costa de Beauregard Senior Manager, Data Consulting
  • Marion Sanchez Marion Sanchez Marion Sanchez

    After spending 2 years at Orange, Marion stepped into the digital world at Voyage-Privé before embarking for Dublin with Google. A graduate from ESG, she specialised in e-business.

    Marion Sanchez Media Expert
  • Marie-Adeline Puzin Marie-Adeline Puzin Marie-Adeline Puzin

    Telecommunications, media, insurance... Marie-Adeline worked as a consultant or digital project manager in various fields and organisations, from small NGOs to Capgemini. She graduated from Dauphine.

    Marie-Adeline Puzin Program Manager
  • Denis Gence Denis Gence Denis Gence

    A graduate from HEC Paris, Denis speaks French, Creole and a bit of Javascript! Before joining fifty-five he was Sales Manager at Smartapps and Business Developer at

    Denis Gence Data Analyst Senior
  • Cyril Cottin Cyril Cottin Cyril Cottin

    This young IUT Technolac graduate from Savoy 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
  • Martin Daniel Martin Daniel Martin Daniel

    After working some time at Google and BETC, Martin joined fifty-five in the early days. An ESCP Europe alumni, he is in charge of developing simple, powerful data products.

    Martin Daniel Product Manager, Data Science
  • Cyril Agosta Cyril Agosta Cyril Agosta

    Cyril holds a degree in Statistics & Economy. He's interested in web technologies. Which leads him to HETIC. Today he's a JS developer. No logic here, but it all falls into place at fifty-five.

    Cyril Agosta Javascript Developer Associate
  • Camille Cosnefroy Camille Cosnefroy Camille Cosnefroy

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

    Camille Cosnefroy Data Analyst
  • 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 Associate
  • Paul Lefkopoulos Paul Lefkopoulos Paul Lefkopoulos

    After graduating from ENSAE and HEC, Paul sharpens its statistics and marketing skills at BETC Digital. At fifty-five he unleashes the power of data hidden deep down into the weblogs.

    Paul Lefkopoulos Data Science Lead
  • Lamiae Taibi Lamiae Taibi Lamiae Taibi

    A graduate from HEC Paris, Lamiae started working in the finance sector before launching a Rocket Internet company in Morocco. Then the digital crave went on and she joined us in 2013.

    Lamiae Taibi Data Analyst
  • Tierry Danquin Tierry Danquin Tierry Danquin

    Tierry worked at Keyade building decisioning dashboards, before joining fifty-five's engineering teams. He graduated from CESI Paris.

    Tierry Danquin R&D Engineer
  • Simon Camuzet Simon Camuzet Simon Camuzet

    Simon graduated from ENS Cachan in Economy 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 Specialist RTB
  • Geneviève Métayer Geneviève Métayer Geneviève Métayer

    Geneviève started at Garnier before flying off to Australia to work in strategic marketing at Sodexo. A graduate from HEC Paris, she plays the double bass.

    Geneviève Métayer Data Analyst
  • Julie-Anne Negiar Julie-Anne Negiar Julie-Anne Negiar

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

    Julie-Anne Negiar Data Analyst
  • Laurent Senesi Laurent Senesi Laurent Senesi

    Laurent spent many years at Keyade before becoming Search Director 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
  • Eurydice Lafferayrie Eurydice Lafferayrie Eurydice Lafferayrie

    After graduating from HEC Paris, Eurydice went from Paris to San Francisco, and sailed from print to web and mobile publishing before joining our consulting team in 2013.

    Eurydice Lafferayrie Data 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 the data deluge in 2013.

    Hichem Karoui Data Project Lead
  • 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 most expert: digital media, TV reality shows or quaint forgotten music hits?

    Hugo Loriot Media Technologies Director
  • Camille Giard Camille Giard Camille Giard

    An ESCP Europe graduate, 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 Data Analyst Senior
  • Fanny Le Béguec Fanny Le Béguec Fanny Le Béguec

    This former Web Analytics manager at Express-Roularta Group is a business intelligence expert with a vast knowledge of BI tools. Her background finely blends technical and consulting experience.

    Fanny Le Béguec Senior Analytics Expert
  • Robin Bonduelle Robin Bonduelle Robin Bonduelle

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

    Robin Bonduelle Data Analyst
  • 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 Data Consulting, UK
  • +
    fifty-five is hiring
  • 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
  • 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


  • Meet us at J-1∞: Presse-Citron for entrepreneurs

    Presse-Citron organizes a day of meetings for entrepreneurs to get answers to their fundamental questions. They will have the opportunity to meet specialists of various fields of expertise. Mats Carduner and Jean Neltner from fifty-five are pleased to attend this event as "mentors", very likely to help new businesses to grow. Interested? Take a look at the event's website.
  • ECommerceDay: workshop Rank

    The first edition of the ECommerceDay will gather in Paris major decision-makers of the e-commerce market. As part of this event, fifty-five will lead a workshop to present its Rank solution: how to increase your click and add-to-cart rates thanks to Rank's predictive model? For more information about ECommerceDay, please visit the event's website.
  • EBG web-conference: cookies management and data privacy

    fifty-five will lead a web-conference organized by the EBG about cookies management and data privacy. What consequences to the CNIL recommandation? The main goal is to decipher all the aspects of the recommandation, particularly the legal dimension. Interested? Please take a look at the EBG dedicated page.
  • EBG Big Data & Retail Workshop

    55 and Turn will lead a round-table discussion about online sales: how to exploit customer data to increase sales?
    All players with transactional activities are invited to discuss the applications and objectives of Big Data missions. For more information check the event on the EBG website
See event & press history


See event & press history

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  • Site audience
    • < 250 000 Number of unique visitors / month
    • 250 000 - 500 000
    • 500 000 - 1M
    • 1M - 5M
    • 5M - 15M
    • > 15M
  • Industry sector
    • Banking, Insurance & Finance
    • Automotive
    • Cosmetics
    • Food
    • Luxury
    • Media, Local & Entertainment
    • Retail
    • Healthcare, Energy & Government
    • Technology
    • Travel
  • Web analytics solution used
    • Google Anaytics
    • Urchin
    • Omniture
    • Nedstat
    • Unica
    • Coremetrics
    • Weborama
    • AT Internet (XiTi)
    • Autre
    • Aucun
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