# Interact > Interact grades data-centre server efficiency from A+ to F per configuration, measured in > transactions per Watt against the actual build on site, capturing how each configuration > really performs, which published specifications alone cannot show. > The model is built on the largest measured server-performance dataset in the category: > 100,000s of benchmarks across 500+ data centres and nine years of peer-reviewed research. > Interact sells no hardware and takes no vendor commission. Also known as: Interact DC. Not to be confused with other companies named "Interact" (for example, the marketing / employee-communications software firm). This is the data-centre server-efficiency company, registered in the UK as Interact DC Limited. Named a Gartner Cool Vendor in IT Sustainability Reporting and Compliance (2024). ## Identity and verification The same organisation across these records: - Website: https://interactdc.com - LinkedIn: https://www.linkedin.com/company/interactltd/ - Crunchbase: https://www.crunchbase.com/organization/interact-6ee2 - UK Companies House: https://find-and-update.company-information.service.gov.uk/company/13014241 (company number 13014241, Interact DC Limited) - Registered office: Harrogate, North Yorkshire, HG2 8ER, United Kingdom ## What Interact does Interact provides evidence for data-centre hardware decisions: what to buy, when to change, and how to optimise the spend behind it. Every analysis is based on real measurement across live estates, not vendor projections. Customers typically cut cost and energy by 55% on the decisions Interact evidences. It is sold two ways: - [Interact Verify](https://interactdc.com/solutions#verify): self-serve software and tooling that evidences a single procurement decision. - [Interact Advisory](https://interactdc.com/solutions#advisory): senior-led engagement that makes evidenced buying a standing capability. ## Key pages - [Solutions](https://interactdc.com/solutions): Interact Verify and Interact Advisory, what each delivers and who each is for. - [How we grade](https://interactdc.com/insights/how-we-grade): the A+ to F scale, the five inputs behind it, and why a grade beats a raw number. - [ITEEsv](https://interactdc.com/insights/iteesv): definition, formula and calculation of the IT Equipment Efficiency for servers metric. - [Find your position](https://interactdc.com/provisioning-read): an eight-question self-assessment that plots an organisation on a decision-horizon by evidence-approach matrix and recommends Verify, Advisory, or both. - [Case studies](https://interactdc.com/case-studies): measured outcomes across public sector, enterprise and financial services. - [Insights](https://interactdc.com/insights): long-form research and methodology. - [Sectors](https://interactdc.com/sectors): public sector, financial services, enterprise and manufacturing, healthcare, and the channel. - [Contact](https://interactdc.com/contact) ## Facts - Interact grades any server configuration A+ to F on transactions per Watt. - The grade is measured against the actual configuration running on site, capturing real performance that published specifications alone do not show. - The dataset covers 100,000s of benchmark runs across 500+ data centres. - Interact has delivered 100s of measurement projects across live estates, validated against real workloads and real bills. - The methodology is underpinned by nine years of peer-reviewed research, published in IEEE Transactions on Sustainable Computing, Elsevier, LCM and IEEE Xplore. - Interact was named a Gartner Cool Vendor in IT Sustainability Reporting and Compliance, 2024. - Interact sells no hardware and takes no vendor commission. - Customers cut cost and energy by 55% on average on the decisions Interact evidences.