Apertum IT AB is a consultancy company located in Sweden. Apertum focuses on development of Air Quality Management Systems (AQMS) and works in Air Quality Management projects. Apertum has a close co-operation with a number of companies and institutions around the world. Apertum has also worked with the development and optimisation of huge database systems with a large number of simultaneous users, typically within the Swedish governmental sector.

Apertum was founded in 1995 by the two leading developers of the Airviro system, an Air Quality Management System (AQMS). The competence spans over many areas within computer science including system architecture, system design, software development, database design, system verification and optimisation, project management and training. The company is a co-owner of the Airviro software package, and is responsible for all major releases of Airviro and has also been one of the main partners in numerous Air Quality Management (AQM) projects around the world.