- Airbnb: Ruby on Rails, MySQL, Amazon Web Services (AWS)
- Uber: Go, Node.js, Java, Python, PostgreSQL, MySQL, Redis, Kafka
- GitHub: Ruby on Rails, Go, Erlang, MySQL, Redis
- WhatsApp: Erlang, FreeBSD, Yaws, Ejabberd, Mnesia DB
- LinkedIn: Java, Kafka, Hadoop, Cassandra, Oracle, Voldemort (LinkedIn’s own distributed database)
- Netflix: Go, Gluster, Apache Tomcat, Hive, Chukwa, Cassandra, Hadoop, MySQL, Amazon Web Services (AWS)
- Slack: PHP, Java, MySQL, MongoDB, Kafka
- Facebook: PHP (HHVM), React, GraphQL, MySQL, Cassandra
- Twitter: Scala, Java, Ruby, MySQL, Aurora, Redis
- Spotify: Python, Java, ZeroMQ, PostgreSQL, Cassandra, Google Cloud Platform (GCP)
- Pinterest: Python (Django), Java, Redis, Cassandra, Kafka
- Snapchat: Python, Java, PHP, Cassandra, Google Cloud Platform (GCP)
- Dropbox: Python, Go, Rust, MySQL, Amazon Web Services (AWS)
- Zoom: C++, Java, MySQL, Kafka, Amazon Web Services (AWS)
- Shopify: Ruby on Rails, MySQL, Redis, Liquid (templating), Google Cloud Platform (GCP)
- TikTok (ByteDance): Python, C++, Java, Nginx, MySQL, Kafka
- Reddit: Python (Django), PostgreSQL, Redis, RabbitMQ, Amazon Web Services (AWS)
- Instagram: Python (Django), React, PostgreSQL, Redis, Amazon Web Services (AWS)