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Germain Chastel

Entrepreneur • Advisor San Francisco Bay Area, US

CEO and founder of NewtonX, currently building the team of developers and data scientists that will disrupt the Expert Knowledge Industry

CEO and founder of NewtonX, currently building the team of developers and data scientists that will disrupt the Expert Knowledge Industry

16 vouches

Primary Skillsets

  • Business Development
  • Fundraising
  • Growth
I have an idea I'm commited to

Primary Cofounder Skillsets

  • • Business Development
  • • Fundraising
  • • Growth

Involved In




McKinsey & Company


Commercial Development July 2008 - December 2008
Engagement Manager McKinsey & Company June 2014 - April 2016
Associate McKinsey & Company September 2012 - December 2013
Co-Founder RasoirClub May 2012 - May 2013
MBA candidate Harvard Business School September 2010 - June 2012
Intern Groupon Brasil January 2012 - March 2012
Summer Intern Merchantry June 2011 - September 2011
Business Analyst McKinsey & Company January 2009 - September 2010
Commercial Development Alternativa July 2008 - December 2008
Acquisition Finance Analyst Societe Generale June 2006 - July 2007
Intern Brandt UK May 2005 - August 2005


Harvard Business School 2010 - 2012
Asian Institute of Technology International Business 2007 - 2008
ESCP Europe Management 2004 - 2008

Interested In

Cofounder With
  • • Data Science
  • • Back End Engineering
  • • Product
  • • UI/Design
Advisor With
  • • Marketplaces
  • • B2B sales
  • • Local Marketing
Markets of Interest
  • • Enterprise Software
  • • Productivity Tools

You Should Know About Me

Key Strengths

Business Strategy • Strategy

Key Accomplishments

I am the co-founder and CEO of NewtonX, an online marketplace for expert knowledge.
The idea for NewtonX came from my experience at McKinsey and Company where I was an Associate Partner in the high-tech practice.
Before that, I founded RasoirClub in France, a subscription-based business delivering quality shaving accessories monthly to our customers' doors, for a fraction of the big players' price (

Vouches Received

Vouches Given

Think Germain is awesome?
Vouch for them.

Camille Tyan
They're my school
Germain is both very smart and very driven: therefore I'm convinced he will go all the way to find the right answer to make a business succe ... ssful.
Hugues Chastel
We worked together at RasoirClub
Germain is one of the most persuasive people I know. When we had to convince our investors and suppliers, Germain was the one turning the sc ... ale.
Jonathan Lo
They're my school
Germain is a versatile and intelligent individual with the innate ability to dissect and make sense of any situation.
Yoann Copreaux
We worked together at McKinsey & Company  •  Co-founder&CEO @Tifosy. Into football industry. Previously worked @Arsenal FC, in a start-up and @McKinsey. Harvard Business School grad.
Germain is super driven. He first develops the vision, and then run after it, ready to pull out the hours to make things happen! However, he ... is not the type of guy to make a brainless run either. Very smart, he'll make the optimal run towards the end goal. Last but not least, you won't get bored with Germain, he is great to hang out with. That's a big plus when the hours get long!
Sarah Paiji
They're my school
Germain is a complete self-starter. He loves building new things and wants to change the world. He's very curious and tenacious, an independ ... ent thinker who doesn't hesitate to speak his mind. He also loves engaging with others around ideas as well as rolling up his sleeves to collaboratively build new products and services.
Sasha Astafyeva
They're my school
Germain is a risk-taker and a half. He is incredibly driven, passionate about his pursuits, Always curious to meet people and talk ideas wit ... h them. He Works hard and does not stop before he achieves what he is working towards.
Damien Joannes
They're my school
Because he has what it takes
They're my school
Through his educationnal, professional and personnal background, Germain has developped an impressive tool box to be a great entrepreneur. H ... e has leadership, communication and prefectionist skills allowing him to identify project with high potential as well as managing them up to success.
Mark Lurie
They're my school
Germain has a combination of analytical intelligence, hunger, and perhaps most of all charisma to lead.
We worked together at Harvard Business School
I can really vouch for Germain. When Germain and I worked together at McKinsey&Company, Germain was already one of the top performers of th ... e company. Germain is analytical, book smart and driven. Everything it takes to be successful at McKinsey. Later one at HBS, I have been able to observe Germain's exceptional energy: living a very intense social life, while practicing sport at a very demanding level and delivering super smart comments in the classroom. Germain is for me the ideal combo for an entrepreneur: super smart, driven, hungry, charismatic, enthusiastic and a great team player. The guy / woman who will have the chance to work with Germain is indeed very fortunate.
Claude Burton
They're my school
Germain is a passionate entrepreneur who seeks a strong connection with his target customer. During his time with McKinsey in Brazil, he en ... thusiastically met with customers seven days a week to define and launch a new product offering for his client. He is creative in iterating to maximize the customer valuation proposition, constructing high-ROI business models and identifying paths to rapidly accelerate growth.
They're my school
Germain is passionate about everything he does. He's very bright and adapts quickly to any situation. He is also thoughtful, trustworthy a ... nd thinks outside the box - all qualities that make great entrepreneurs.
Rebeca Minguela
They're my school  •  Advisor / Board member, Protheus Technologies and Advisor / Board Member, Columbus Global Solutions. Harvard Business School grad.
Germain is an extremely thoughtful and caring advisor and mentor. He has a unique ability to break down issues into manageable parts, and ma ... kes the tough choices easier for the entrepreneurs. His advice has been invaluable to me in many occasions, and I can say that having him as an advisor is an invaluable help.
John A. Mascari
They're my school  •  Co-Founder, Bundle Organics. Previously Project Manager, Vox Supply Chain. Harvard Business School grad.
While I've never worked with Germain in an official capacity, he has been an invaluable “sounding board” for me as I worked through seve ... ral founder-level decisions. As a result of Germain’s exceptional ability to quantitatively and qualitatively tackle strategic challenges and identify the solutions (as well as his willingness to share his insights), he is always one of my first calls whenever I need an outside opinion. His raw intelligence is unique. Germain’s involvement would be a meaningful advantage for any team
Philippe CAHUZAC
They're my school  •  CEO & Co-Founder, GAIA Design. Previously MBA - Class of 2014, Harvard Business School. Harvard Business School grad.
Germain has a unique set of experiences combining management consulting in a wide array of industries and start-up experience (he co-founded ... a Company in the consumer products space, which he sold a few years after)
Miguel Ortega Rodríguez
They're my friends  •  Product Manager, Global Travel Product & Technology, Groupon. Previously Partner & COO, Blink by Groupon.
I recommend Germain 100% as an outstanding advisor for go-to-market strategies and customer lifecycle management. His insights are extremely ... useful, but beyond his knowledge, it is his ability to help in the decision making process on tough strategic choices that make him a truly irreplaceable advisor.