# Innovations - Multi-user databases

> [HTML Version](multi-user-databases.htm)

Cost and compatibility criteria play the most important role in the selection of the database on which our application is based. Therefore, we offer two different databases, which have different emphases with regard to these criteria.



**PostgreSQL**



It is probably the most powerful free database, which not only has an enormous distribution worldwide but can also be used on the most different operating systems and computer sizes.

In addition, the database can be easily installed as a cloud server or rented from appropriate providers to use databases across branches.



**Microsoft SQL-Server**



is the most frequently used database server in the world. Due to its wide distribution, the data it contains can be used by many third parties. In this way eXtra**4**<winIII> can easily be extended by additional functions.