"Reducing Energy consumption by fair billing"

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"ista is a global leader in the field of energy efficiency"

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Consumption-based energy performance certificates meet with broad acceptance

The number of consumption-based certificates issued for residential buildings has almost doubled on a monthly average since the deadline ran out on May 1, 2015.

Join us at the climate conference in Paris in December 2015

As a committed player in preserving resources, ista attend Cop21 Solutions. Come and attend our conferences at our booth at the Grand Palais.

Living our values

Values represent the very foundation of a company. They express the culture, spirit and way a company runs its business – towards customers, stakeholders, but also towards its employees.



The efficient use of energy and water is one of the major issues of our time.With our solutions we not only meter but make energy consumption visible. Thereby help consumers to save energy and change their individual energy consumption behaviour.

ista international

ista is one of the world's leading companies providing energy management services for greater energy efficiency in buildings. ista specialises in the recording, billing, visualisation and management of heat, water and gas in 25 countries worldwide.


Corporate Social Responsibility does not take place on the fringes but at the heart of ista. Our products  are sustainable to the very core because they help conserve resources. Therefore, the focus of our entire company is very much on responsibility. 

Investor Relations

We place great emphasis on maintaining a strong relationship with our investors. To ensure that they are kept abreast of our strategies, performance and key business activities, we continuously engage with our investors.