UK ISP comparison
CityFibre vs Openreach
CityFibre is a wholesale XGS-PON platform in 80+ UK towns; Openreach is the nationwide incumbent wholesale network. Retail on CityFibre often prices gigabit £10 to £20 below equivalent Openreach FTTP where both are available. Openreach is nationwide. In CityFibre cities, CityFibre-based retail typically wins on price
Wholesale full-fibre rivalry between CityFibre and Openreach defines the UK altnet vs incumbent dynamic. Comparison is on retail price impact in CityFibre cities.
What changed: Added answer capsule, side-by-side comparison table, key-facts block, question-led headings, and attributed stat callout for AI citation, 3 June 2026.
Key facts
- CityFibre-based retail tariffs (Vodafone, TalkTalk, Sky, Zen) typically price gigabit £10 to £20 below equivalent Openreach FTTP retail. (pricing comparison section).
- Openreach is nationwide. CityFibre is in 80+ towns and cities. (coverage comparison section).
- CityFibre entry Wholesale; retail set by ISP partner; Openreach entry Wholesale; retail set by ISP partner (FBRE ISP profiles, May 2026).
| Attribute | CityFibre | Openreach |
|---|---|---|
| Network | Wholesale XGS-PON FTTP | Wholesale FTTP and FTTC (Openreach) |
| Top speed | Up to 5.5 Gbps wholesale platform | Up to 900 Mbps FTTP at retail via ISP partners |
| Price band | Wholesale; retail set by ISP partner | Wholesale; retail set by ISP partner |
| Contract | not published | Set by retail ISP partner |
| Availability | 80+ UK towns and cities via partner ISPs | Nationwide UK |
| Switch path | One Touch Switch; separate network may need overlap install | One Touch Switch; separate network may need overlap install |
What is CityFibre?
CityFibre is the UK's largest independent wholesale XGS-PON full-fibre network, 80+ towns and cities.
What is Openreach?
Openreach is the BT Group wholesale division operating FTTC and FTTP nationwide.
Which is cheaper, CityFibre or Openreach?
CityFibre-based retail tariffs (Vodafone, TalkTalk, Sky, Zen) typically price gigabit £10 to £20 below equivalent Openreach FTTP retail.
Is CityFibre faster than Openreach?
Both deliver XGS-PON gigabit and multi-gigabit. Functionally similar at the wholesale layer.
Which has wider coverage, CityFibre or Openreach?
Openreach is nationwide. CityFibre is in 80+ towns and cities.
Which should I choose, CityFibre or Openreach?
In CityFibre cities, CityFibre-based retail typically wins on price. Outside, Openreach is the only mainstream wholesale option.
Who is each provider best for?
Consumers in CityFibre cities should compare Vodafone CityFibre, TalkTalk CityFibre and Sky CityFibre against equivalent Openreach FTTP from BT, Sky and Plusnet.
Can I switch between CityFibre and Openreach?
- Check availability at your postcode for both providers. Coverage matters more than the headline brand.
- Compare like-for-like on speed, contract length and total cost of ownership for 12 to 24 months.
- Use One Touch Switch to move. Your new provider does the heavy lifting.
- Test your speed after the switch on UKSpeedTest.co.uk and complain if it materially underperforms.
Last updated: 3 June 2026. Pricing changes frequently. Always check the latest tariff at the provider's own site or via SearchSwitchSave.com.
Common questions
How long does a switch between CityFibre and Openreach take?
Under the UK One Touch Switch process introduced by Ofcom in 2024, most switches between two UK fixed-line broadband providers complete within ten working days. The gaining provider takes responsibility for the switch and your existing contract ends automatically. See Fibreswitch.com for the live status of your switch.
Will I lose service during the switch?
Most One Touch Switch moves between Openreach-based providers happen with no service downtime, because the underlying line stays connected. Moves between Openreach and a separate network (Virgin Media, Hyperoptic, Community Fibre, Netomnia, CityFibre via altnet retailer) can involve a brief overlap period to avoid any gap in connectivity. Your gaining provider will confirm the precise method during the order.
Can I keep my router?
Generally no. Most UK ISPs issue their own router optimised for their network and supply chain. You can use your own router on most Openreach FTTC and FTTP services, but bear in mind support and Wi-Fi guarantees apply to the supplied router. Cable, XGS-PON and certain proprietary altnet networks require the supplied modem or ONT.
Is the switch process the same in Northern Ireland?
One Touch Switch covers Great Britain. In Northern Ireland, switching processes follow Ofcom NI guidance and may differ for the Hull region where KCOM operates the historic incumbent network. Check with your gaining provider for region-specific guidance.