Apache superset is completely fully open-sourced and free to use.

Apache superset is a BI tool that does not require any coding(only SQL is required)

Superset supports various SQL databases via SQL Alchemy connection which allows you to multiple databases.

Superset provides SQL-Lab which allows you to select a database, schema, and table to perform the interactive query.

In superset UI, a user can also view the Query history.

Superset integrates easily with various authentication tools like LDAP, OAuth, etc.

Apache superset is used by many companies for data visualisation and analysis