Registered providers list
We’ve compiled a list of all the Registered Providers taking part in the Demand Flexibility below. There are two tables (one for domestic households and micro-businesses and one for all other businesses). This will show you how you can contact these providers and take part in the service with them. It also shows if they are a member of the Flex Assure compliance scheme.
Last updated: 24 February 2025
| DFS Registered Participant | Flex Assure |
|---|---|
| Attune Energy | |
| Axle Energy Ltd | |
| British Gas | |
| CarbonLaces Solutions | |
| Electryone AI | |
| Equiwatt | |
| Fuse Energy Supply Limited | |
| GivEnergy (via Octopus Energy Trading Ltd) | |
| Good Energy (via Axle Energy Ltd) | |
| Hildebrand Technology Ltd | |
| Joulen | |
| Octopus Energy | |
| Octopus Energy Trading Ltd | |
| Perse Technology Ltd | |
| ScottishPower (via Equiwatt) | |
| SolarEdge (via Axle Energy Ltd) | |
| Stark Flex (via Perse Technology Ltd) | |
| Uswitch (via Hildebrand Technology Ltd) | |
| Utilita Energy Ltd |
| DFS Registered Participant | Flex Assure |
|---|---|
| AMP Clean Energy | |
| Attune Energy | |
| Axle Energy Ltd | |
| CarbonLaces Solutions | |
| CUB (UK) Ltd | ✅ |
| Drax Energy Solutions Ltd | |
| Electryone AI | |
| Engie Power Ltd | |
| Gallagher Aggregates Ltd | |
| Good Energy (via Axle Energy Ltd) | |
| Gridbeyond Ltd | |
| Gridimp | |
| Hildebrand Technology Ltd | |
| Infinis Ltd | |
| Joulen | |
| OakTree Power | ✅ |
| Octopus Energy | |
| Optimo Energy | |
| Perse Technology Ltd | |
| Stark Flex (via Perse Technology Ltd) | |
| SSE Digital Services Limited | |
| U Energy | |
| Vest Energy Ltd |
What is Flex Assure
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FlexAssure is a compliance scheme for flexibility service providers. The scheme runs two codes of conduct:
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Flexibility providers who join Flex Assure as members must demonstrate that their organisation aligns to the relevant voluntary code of conduct. These codes set out minimum standards that protect customers and help build trust in how flexibility services are delivered. Flex Assure independently assesses this alignment. NESO has no responsibility for auditing or overseeing compliance with the Flex Assure Scheme.
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NESO’s Demand Flexibility Service explained
All you need to know about our Demand Flexibility Service (DFS) including why we have introduced DFS and how you can take part.