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32 Answers
Ayan Barua

Python is the #1 product by market share in the Languages category and ~5,000 companies on Siftery have verified that they are using the software. Here is a quick list of some of the high profile customers using Hadoop:

LiveRamp, Dropbox, Thumbtack, Zenefits, Evernote, DoubleDutch, Oscar Health, Splunk, Atlassian, Gartner, New York University, General Electric, Google, Citi, Toyota, Juniper Networks, BuzzFeed, WebMD, Qualtrics, Lego, Sephora, Yale University, Nasdaq, CircleUp, and many others.

Here’s the full list of companies using Python on Siftery.

(Disclaimer: The above data was pulled from Siftery and has been verified by individuals working at the above companies)

Quora User
Projectplace International AB
www.projectplace.com has adopted python since 1998 and been using it ever since.

Probably the only company to write a NoSQL database(Object database) in python way back in 90's, though later re written in C++
Steven Grimm
Facebook uses Python, though not as extensively as some other companies.