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Customer Portals
In the picture, a man wearing glasses and a gray sweater sits at a desk. On the desk, located in the foreground, are a laptop on the left and a tablet in his right hand. He is looking at the tablet while holding a pen in his left hand. In the background, there is a brick wall and blurred office items, including a mug and other objects on another desk to the left.

Prevent overcharges with reliable invoice validation.

We bring clarity to commercial and industrial utility bills.

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Safeguard against inaccurate billing

Automated and manual hybrid billing check

Dedicated relationship manager

Facing utility billing discrepancies? We have the solution.

Statistics reveal that 1 in every 11 utility invoices contains discrepancies. These inconsistencies can stealthily inflate your expenditure, often going unnoticed until they have carved a substantial dent into your finances.

ista leads the way in ensuring your utility bills are accurate. Our invoice validation services, backed by ISO9001:2008 accreditation, provide a robust safeguard against costly inaccuracies. We meticulously review every aspect of your bills to ensure you're only paying for the actual consumption.

Choose accuracy with ista.

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With ista as your trusted partner for invoice validation services, you enjoy worry-free service and a range of benefits.

We provide a customized hardware setup to make sure your project runs smoothly. Our special ista platform can spot any issues, and our expert data team will look closely into these, understanding the details and suggesting solutions that might be missed by automated systems.

Discover more innovative solutions to transform your property.

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

The picture shows a man who is apparently sitting in a café or restaurant with his laptop at a single seat with a glass table. He is sitting at the edge, right next to a window front that can be seen in the background. He is wearing a grey flowing jacket and a simple black jumper underneath. He has short brown hair and wears square black glasses. He is holding his mobile phone to his ear with his right hand and appears to be making a call as he smiles broadly. His left hand is placed on the touchpad of his laptop.

Energy Procurement

Optimise costs through strategic energy purchasing solutions.

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The picture was taken diagonally upwards towards the ceiling of the office space. As a result, you can see the dark brown ceiling with white ceiling elements and silver pipes stretching across the entire ceiling in the background. In the lower left part of the background, you can see several office desks and glass partitions. You can also see a man sitting with his back to the viewer. On the right, in the background, you can see more glass partitions, more office desks and chairs and a white wall with two large bright windows. The entire background is blurry, as the photo focuses on the man sitting at a white office desk with a light grey laptop in the foreground, from which the photo was taken. The man is wearing a light blue shirt with a dark blue jumper over it and black square glasses. His hair and beard are greying, and he is smiling as he talks to a customer about their Energy-Management-Minute-Review provided by ista.

Energy Management

Manage and reduce energy usage strategically.

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The image features a professional woman seated in a modern office setting, illuminated by natural light from large windows. She is wearing a beige blazer over a white blouse and matching beige pants. The woman has shoulder-length blonde hair and is wearing glasses. She is holding a laptop on her lap and looking outside with a pleasant and focused expression, because the energy accounting from ista is making everything easier. The background includes several lush green plants, adding a touch of nature to the workspace.

Energy Accounting

Streamline energy data with a unified platform.

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The image showcases a dynamic urban scene featuring several modern skyscrapers reaching towards the sky. The buildings are a mix of glass and steel structures, reflecting a professional and corporate environment. Superimposed over the scene are vibrant, multicolored light streaks that converge at a bright point in the sky, symbolizing connectivity and technology. The light streaks add a futuristic and energetic element to the image, suggesting advanced communication networks or data transfer within a bustling cityscape. The overall composition highlights the intersection of modern architecture and innovative technology.

Meter Operator & Data Collection

Achieve accurate billing and optimised energy management with our cost-effective solutions.

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