| Websites | Popularity
| Front-end
| Back-end
| Database | Notes |
| Google | 1,600,000,000 | JavaScript, TypeScript | C, C++, Go, Java, Python | Bigtable, MariaDB | The most used search engine in the world |
| Facebook | 1,100,000,000 | JavaScript, Flow | Hack, PHP, Python, C++, Java, Erlang, D, XHP, Haskell | MariaDB, MySQL, HBase, Cassandra | The most visited social networking site |
| YouTube | 1,100,000,000 | JavaScript | C, C++, Python, Java, Go | Vitess, BigTable, MariaDB | The most visited video sharing site |
| Yahoo | 750,000,000 | JavaScript | PHP | PostgreSQL, HBase, Cassandra, MongoDB, | |
| Amazon | 500,000,000 | JavaScript | Java, C++, Perl | PostgreSQL, RDS, RDS Aurora | Popular Internet shopping site |
| Wikipedia | 475,000,000 | JavaScript | PHP | MariaDB | "MediaWiki" is programmed in PHP; free online encyclopedia |
| Twitter | 290,000,000 | JavaScript | C++, Java, Scala, Ruby | MySQL | 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, JavaScript, Scala | Oracle Database | Online auction house. |
| MSN | 280,000,000 | JavaScript | C# | 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, Scala | Voldemort | World's largest professional network. |
| Pinterest | 250,000,000 | JavaScript | Python, Erlang | MySQL, Redis | Search engine for ideas. |
| WordPress.com | 240,000,000 | JavaScript | PHP | PostgreSQL, HBase, Cassandra, MongoDB, | Website manager software. |
