A child sits on a sofa and writes on a piece of paper with a pen, as if doing homework or an exercise. Next to the child sits an adult in white traditional clothing, helping with learning by pointing to the screen of an open laptop. The laptop is blurred in the foreground, which puts the focus on the joint work. The bright, tidy environment looks like a living room or quiet work area. The scene conveys guidance, concentration and joint learning at home.
Clarity, comfort, control for End-users.

Easy energy services that work for you, not the other way around.

Our services are designed to simplify work and make it more accurate. By using innovative technologies and digital services, we simplify your life and reduce effort.

Where transparency meets quality of life.

With ista at your side, you benefit from a wide range of smart energy and building management services. Whether transparent consumption recording, automated billing, digital monitoring platforms or intelligent energy-saving solutions.

Close-up of several people at a shared workspace: hands typing on keyboards and operating computer mice on desktop PCs. One person is wearing a yellow knitted jumper and a bracelet; other arms can be seen blurred in the foreground. The scene conveys concentrated work in an office or training room.

Utility Billing

Consolidate all your utility services into one streamlined billing system, simplifying payments and reducing administrative efforts for both property managers and end-users.

A technician is working in a narrow technical room or basement corridor under a ceiling with several parallel metal pipes. He is wearing a blue safety helmet and a work jacket and is raising both arms to check or adjust a pipe or bracket above him. On the right, further installations such as ventilation ducts and cable ducts can be seen, while the walls are made of concrete or brickwork. The perspective looks along the pipes into the depths of the room and emphasises the technical infrastructure of the building.

Retrofit Solution

Transform your existing systems with our retrofit solutions, designed to improve efficiency, sustainability, and performance without the need for full system replacements.

A person sits in a modern office in front of large windows, holding a smartphone in their hand. An open laptop sits on the table. Outside, an illuminated cityscape can be seen at sunset. The scene conveys concentrated work in a quiet, professional environment.

Collection of Chilled Water Charges & Customer Service

Enhance your payment processes and customer satisfaction with efficient cash collection services and dedicated support, ensuring smooth transactions and responsive assistance for end-​users and property managers.

Be in control.

Get transparency and easy payment with MY ista.

Experience the convenience of managing your energy consumption, account and bills in one place with our online energy portal.

End-users service source.

A person is sitting at a wooden table in a bright room with lots of green plants in the background. They are wearing a white blazer and white shirt and are holding a smartphone in both hands, as if reading a message or working on a task. There is a tablet on the table, which is switched off and reflects the light in the room. The atmosphere appears calm and focused, enhanced by the natural light coming in from the side. The scene conveys the impression of a modern working environment where digital devices are used to efficiently complete professional tasks or prepare for a conversation or meeting.

Tips for saving energy and money.

Discover practical tips to reduce your energy consumption without sacrificing comfort.

Read more

Quick help, clear answers.

Whether you have technical questions, account settings or an overview of functions - you'll find everything you need here.

150,000+ meters enabled real-​time data.

Seamless MDMS integration of meters enabled real-time data access, faster billing, and greater satisfaction.

Get instant help.

Most frequently asked Questions and Answers.

Need help and like to get in touch with us.

Our strength lies in our personalised service, backed up by our market-​leading portals, giving our customers 24/7 access to their energy data, on one bespoke platform. 

Where innovation meets responsibility.

Facts & Figures

6,300 employees

Icon: In einem Kreis in der Farbe lime Grün befindet sich eine abstrakte Darstellung der Erde.

20 countries

3.7 mil. t CO₂ emissions avoided

14 mil. utilisation units