Launch of Regulated Data flows service for British Gas - DC/DA


Momentum Program delivered to create smart metering data solutions including Head End


Internal MOP/MAM system delivered and service commenced


Map service launched for Macquarie


Largest ever industry data migration of its kind - 13 million records


Launch of Dual-fuel Universal Supplier Solution concept with Utiliteam


Half Hourly solution development


RE-Qualification of Callisto in the NHH-DC/DA market to 20 million MPANs

delivering a service.

Experts in Settlement Performance

Experts in Settlement Performance

A robust settlement process that complements our customer’s best practices for customer services and billing achieved through our Managed Services provision

Experts in Settlement Performance

Large-scale Transition Experience

Proven through large-scale outsourcing of services including British Gas, OVO/SSE and E.ON Next with industry leading exception clearance performance

Experts in Settlement Performance

Thought Leadership & Industry Expertise

Data science capabilities offering a flexible, collaborative approach to developing and refreshing what our clients need in a rapidly evolving regulatory environment

Experts in Settlement Performance

Cloud First

Fully supported systems through in-house IT, allowing an agile approach to maintaining and developing our evolving services

Experts in Settlement Performance

Multi-site Delivery

Operations in Nottingham, Noida and Newcastle, creating strong continuity resilience

Our Data Management services are delivered with a comprehensive quality assurance commitment. Business management processes are certified to ISO 9001 and information security management systems are certified to ISO 27001 providing complete security assurance.


passionate about what we do.

industry experts in data management

Callisto has, and continues to invest heavily in advanced technologies, including the launch of a new Half Hourly platform, which will facilitate innovative services in the market, including Elective Half-Hourly settlement.