Green solutions to make your property sustainable.

Reduce your property's carbon footprint, build a sustainable future, and enhance your property's image. Our SmartTech solutions offer innovative ways to manage your environmental impact effectively.

Your benefits at a glance:

Reduce CO₂ emissions

Achieve sustainability through energy savings

Enhance property value

Future-proof properties with our smart devices

Nationwide coverage wherever you are

Choose ista for the best-in-class eco-friendly solutions and sustainable property management.

By reducing your carbon footprint and implementing sustainable practices, you can save money on utility bills while creating a healthier and more comfortable living environment.

Our services are designed to make green living simple and achievable, with easy-to-implement solutions that create a big impact.

Learn more about our eco-friendly services and join us in our mission to create a better world.

--> Just show if functional expanation part down below is shown. Please delete the text here later.

We are an Energy Service Company (ESCO)

An ESCO is a specialized organization that delivers end-to-end energy solutions. Our services include energy audits, design, implementation of energy conservation measures (ECMs), financing, as well as the operation and maintenance of energy systems.

Our core mission is to improve energy efficiency and reduce energy costs — often with little to no upfront investment required from the client.

We operate under performance-based contracts, meaning our compensation is directly linked to the energy savings achieved. This model aligns our success with our clients’ cost reductions and ensures accountability.

Popular services

Energy management & ESCO services

Achieve greater energy savings and efficiency with our comprehensive energy management and ESCO services, focusing on performance improvements with no upfront costs through guaranteed savings.

Retrofit services

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

Control and manage

Energy audit

Accredited to perform ASHRAE Level 1, 2, and 3 energy audits by the designated authority.

Carbon audit & reporting

Assess and reduce your carbon footprint with our carbon audit and reporting services, helping you meet sustainability goals while staying compliant with environmental regulations.

Property improvement

Smart valve service

Improve system efficiency and control with our smart valve services, using real-time data and automation to optimize flow, reduce energy consumption, and enhance performance.

Indoor air quality measurement

Ensure a healthy indoor environment with our advanced air quality measurement solutions, designed to monitor, assess, and optimize air conditions for better health and comfort.

Compliance reporting and billing

Simplify energy regulations with tailored solutions for accurate energy metering and billing.

Partner with us for a sustainable future — let's discuss your property needs today.

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

43 mil.
radio devices

14 mil.
utilisation units

Innovative solutions which deliver results.

Our digital solutions are designed to help our clients reduce their environmental impact, improve health and safety in their buildings, and reduce energy costs.

The picture shows a man sitting on a balcony in an urban environment. He is wearing a dark blue suit and a white shirt and is sitting relaxed at a small black table on the lower half in the centre of the picture. On the table in front of him are a laptop, a notepad with a pen and a coffee mug. The man has rested his legs on the balcony railing and is holding a telephone in his left hand while talking on the phone. The balcony is richly decorated with plants. On the left of the picture, climbing plants stretch up the wall, taking up almost the entire left side of the picture. Below the climbing plants are several pots of flowering plants and greenery arranged along the floor of the balcony. Above the man, stretched across the balcony, is a string of lights with several light bulbs that extends from the top left-hand corner to the right-hand side of the picture. In the background you can see a row of multi-storey buildings in various shades of yellow stretching across the top and centre of the picture. Behind the buildings is a park-like landscape with many trees that further break up the background. The sun seems to be either rising or setting, giving the picture a warm, golden glow. The view from the balcony extends over the roofs of the city.

Be compliant

Meet local authorities regulations easily with our tailored solutions designed for building and real estate compliance.

The picture shows a section of an open laptop from an angle so that only half of the keyboard is visible. A person in a blue shirt, of whom only the hands and arms can be seen, is in the right-hand half of the picture and is typing on the laptop keyboard. The hands and the laptop keyboard are in the centre of the picture and are in focus. To the right of the laptop, a smartphone and a black cup can be seen in a blur. In the background is a window that floods the room with light.

Be in control

Gain full control of properties through precise data insights and real-time monitoring.

The picture shows a young man leaning against a glass railing and holding a small tablet with a white cover in his hand. He is smiling and looking into the distance. The man has short brown hair and a short brown beard and is wearing a beige suit with a white t-shirt underneath. Since the photo was taken from a frog's-eye view, you can see a tall, modern office building made of light-coloured stone with four rows of large windows in the background.

Be energy efficient & cut costs

Embrace the future of energy management, with reduced energy consumption and improved financial performance at its core.