Take control of what you pay for, where, and why
carbon accounting made easy
Energy invoice validation you can count on

Understand energy consumption histories, trends, and patterns by locations and sites
The most accurate and scalable invoice validation solution in the UK
Optima Energy Systems (‘Optima’) specialises in deep-dive data analysis software and services to enable you to make sense of your energy charges, and to use the data to exercise greater control.
Energy Invoices
With Optima’s Data Analytics platform, Optii, our customers can do precisely that. With Optima’s Bureau Services, our analysts can do it for them.
ESG Reporting
Once the data is analysed it also provides a robust basis for ESG reporting in compliance with the Streamlined Energy and Carbon Reporting regulations; the data is in perfect shape for auditing.
Save time and reduce costs
Gain insight and control
meters analysed
locations monitored
UK water companies use Optii
commercial customers
Our Solutions
Pay for what you get
Energy costs can run into millions; often the second largest expense in running a company after payroll costs. Energy comes along with other commitments too, as the battle against climate change brings carbon emissions and associated reporting and levies into play.
Ensuring accurate Net Zero data
Optii
Cloud-based data analytics platform
No paper, No errors. Just pure insight.
One single database delivering one version of the truth; both for invoice validation and carbon emissions reporting Scopes 1, 2, and 3.
- Intuitive UI with data visualisation graphics delivered via dashboards.
- Validates every pass-through charge (government levies, distribution network charges and so on), every month. 77 validation checks.
OptiiParse
Effortlessly parse and validate bills using AI
Streamline invoice processing with OptiiParse
OptiiParse leverages AI to extract and validate PDF bill data automatically, reducing errors and saving time. Seamlessly integrated
into your system, it scales with your business for enhanced efficiency.
- Automatic extraction, validation, and error detection for accurate invoicing.
- Scalable solution compatible with multiple UK energy supplier formats.
Bureau Services
Portfolio management
No admin burden. No missed detail. No worries.
- Energy invoices digested, quizzed, and queried by energy invoice experts, on your behalf.
- We manage and maintain your energy portfolio so you don’t have to.
Carbon Accounting
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Start your journey to Net Zero with integrated validation and carbon accounting tools.
- Integrated directly into your Optii dashboard or into your in-house validation solution
- Gain access to audit-ready emissions data across Scopes 1 and 2, with initial coverage of natural gas and electricity