Programming languages used in most popular websites

One thing the most visited websites have in common is that they are dynamic websites. Their development typically involves server-side coding, client-side coding and database technology. The programming languages applied to deliver such dynamic web content vary vastly between sites.

Programming languages used in most popular websites^[a]

Websites	Popularity (unique visitors per month)[1]	Front-end (Client-side)	Back-end (Server-side)	Database	Notes
Google[2]	2,800,000,000	JavaScript, TypeScript	C, C++, Go,[3] Java, Python, Node	Bigtable,[4] MariaDB[5]	The most used search engine in the world.
Facebook	1,120,000,000	JavaScript, TypeScript, Flow	Hack/HHVM, Python, C++, Java, Erlang, D,[6] Haskell[7]	MariaDB, MySQL,[8] HBase, Cassandra[9]	The most visited social networking site.
YouTube	1,100,000,000	JavaScript, TypeScript	Python, C, C++, Java,[10] Go[11]	Vitess, BigTable, MariaDB[5]	The most popular video sharing site.
Yahoo	750,000,000	JavaScript	PHP	PostgreSQL, HBase, Cassandra, MongoDB,[12]
Etsy	516,000,000 (Total, not unique)[13]	JavaScript	PHP[14]	MySQL, Redis[15]	E-commerce website.
Amazon	2,400,000,000[16]	JavaScript	Java, C++, Perl[17]	DynamoDB, RDS/Aurora, Redshift[18]	The most used e-commerce site in the world.
Wikipedia	475,000,000	JavaScript	PHP	MariaDB[19]	A free online encyclopedia based on MediaWiki, which is programmed in PHP.
Fandom	315,000,000[20]	JavaScript	PHP	MySQL	Wiki hosting service.
X	290,000,000	JavaScript	C++, Java,[21] Scala,[22] Ruby (Ruby on Rails)	MySQL[23]	Popular social network.
Bing	285,000,000	JavaScript	C++, C#	Microsoft SQL Server, Cosmos DB	Search engine from Microsoft.
eBay	285,000,000	JavaScript	Java,[24] JavaScript,[25] Scala[26]	Oracle Database	Online auction house.
MSN	280,000,000	JavaScript	C# (ASP.NET)	Microsoft SQL Server	An email client, for simple use. Previously known as "messenger", not to be confused with Facebook's messaging platform.
LinkedIn	260,000,000	JavaScript	Java, JavaScript,[27] Scala	Venice[28][29]	World's largest professional network.
Pinterest	250,000,000	JavaScript	Python (Django),[30] Erlang, Elixir[31]	MySQL, Redis[32]	Search engine for ideas.
WordPress.com	240,000,000 [33]	JavaScript	PHP[34]	MariaDB[35]	Website manager software.
Netflix	223.090.000 (Subscribers, not visitors)	JavaScript	Python, Java[36]	NMDB,[37] PostgreSQL	The biggest video streaming service in the world.

1. Data on programming languages is based on:

   • HTTP Header information
   • Request for file types
   • Citations from reliable sources

Back-end (Server-side) table in most popular websites

Websites	C#	C	C++	D	Elixir	Erlang	Go	Hack	Haskell	Java	JavaScript	Perl	PHP	Python	Ruby	Scala
Google	No	Yes	Yes	No	No	No	Yes	No	No	Yes	Yes	No	No	Yes	No	No
Facebook	No	No	Yes	Yes	No	Yes	No	Yes	Yes	Yes	No	No	No	Yes	No	No
YouTube	No	Yes	Yes	No	No	No	Yes	No	No	Yes	No	No	No	Yes	No	No
Yahoo	No	No	No	No	No	No	No	No	No	No	No	No	Yes	No	No	No
Etsy	No	No	No	No	No	No	No	No	No	No	No	No	Yes	No	No	No
Amazon	No	No	Yes	No	No	No	No	No	No	Yes	No	Yes	No	No	No	No
Wikipedia	No	No	No	No	No	No	No	No	No	No	No	No	Yes	No	No	No
Fandom	No	No	No	No	No	No	No	No	No	No	No	No	Yes	No	No	No
X	No	No	Yes	No	No	No	No	No	No	Yes	No	No	No	No	Yes	Yes
Bing	Yes	No	Yes	No	No	No	No	No	No	No	No	No	No	No	No	No
eBay	No	No	No	No	No	No	No	No	No	Yes	Yes	No	No	No	No	Yes
MSN	Yes	No	No	No	No	No	No	No	No	No	No	No	No	No	No	No
LinkedIn	No	No	No	No	No	No	No	No	No	Yes	Yes	No	No	No	No	Yes
Pinterest	No	No	No	No	Yes	Yes	No	No	No	No	No	No	No	Yes	No	No
WordPress.com	No	No	No	No	No	No	No	No	No	No	No	No	Yes	No	No	No
Netflix	No	No	No	No	No	No	No	No	No	Yes	No	No	No	Yes	No	No

See also

• Computer programming portal
• Internet portal

• Comparison of programming languages
• List of programming languages
• TIOBE index
• "Hello, World!" program
• CodeHS