Ingres

Postgres is an open-source relational database created by Mike Stonebraker and subsequently maintained and enhanced by a volunteer community and companies. It is presented as a widely used database whose open ownership contributed to its adoption and continued development.

SQLite is a self-contained, serverless, zero-configuration, transactional SQL database engine implemented as a C library. It was created and is primarily maintained by D. Richard Hipp and the SQLite development team and is widely used as an embedded database in applications, devices, and browsers.

Redis is an open-source in-memory data structure server, cache, key-value and document database, and query engine for real-time applications. It supports strings, lists, sets, hashes, sorted sets, JSON, time-series data, transactions, scripting, queues, streams, publish/subscribe messaging, full-text and geospatial queries, aggregations, and vector search. The project is used for caching, distributed session storage, event brokering, real-time analytics, and as a supporting service for the support desk shown in the video.

ClickHouse is an open-source, column-oriented database management system for online analytical processing (OLAP) and real-time analytics. It stores data by column and uses optimized compression and vectorized query execution to process analytical SQL queries while using available CPU resources efficiently. It supports large-scale workloads such as real-time analytics, observability, data warehousing, and machine learning or generative AI applications, including vector search and aggregations. ClickHouse can be self-managed on a machine or deployed through ClickHouse Cloud on AWS, Google Cloud, and Microsoft Azure. ClickHouse Local runs queries on local files such as CSV, TSV, and Parquet without a server. The project provides installers for macOS, Linux, FreeBSD, and Windows, as well as Docker and playground options; the self-managed database is open source.

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