SQLite is a lightweight, embedded SQL database engine written in C that's built into mobile phones, computers, and countless applications. It's public domain software maintained by three people, with over 1 trillion databases in active use. The database is best suited for relational workloads where data needs to stay close to the application. For analytical workloads with similar principles, DuckDB is recommended. Cloud-hosted versions are available through SQLite Cloud, and libSQL exists as an open-contribution fork.