Criteo is an intelligent performance marketing engine and one of the global leaders in digital performance advertising. It enables organizations to follow up with visitors who have left their website without making a purchase. Criteo partners with internet retailers to provide personalized online display advertisements and enables users to improve conversions.

H2 is one of the leading open-source relational database management systems written in Java. It can be embedded in Java applications as well as run in the client-server mode. The main programming APIs of H2 are SQL and JDBC, however the database also supports the usage of the PostgreSQL ODBC driver by acting like a PostgreSQL server. The database engine delivers features like a browser based console application or  a small footprint around 1.5 MB jar file size.