ENSEK is a UK-based technology company providing flexible software for utilities and energy retailers. Its cloud-based SaaS platform is designed to reduce operating costs, support regulatory requirements, and improve customer experiences across domestic and business energy markets. Core capabilities include customer care and billing, account and customer lifecycle management, onboarding, debt management, market communications, and finance and margin analytics. These tools help energy providers manage accounts, deliver accurate billing and reporting, understand cost-to-serve drivers, and make more informed commercial decisions.

ENSEK also offers energy flexibility capabilities, including whole-home optimisation, flexibility monetisation, proactive fleet health, and consumer engagement. Its Ignition platform provides the foundation for retail energy operations, while Flex is an emerging capability focused on automation and behavioural insight. ENSEK is developing these technologies toward a connected energy orchestration platform that brings together customers, devices, and data through phased releases. The company supports millions of customer accounts across the UK and serves organisations including British Gas Energy, British Gas Business, Utility Warehouse, and United Gas & Power.