UK ISP comparison
CityFibre vs Openreach
Wholesale full-fibre rivalry between CityFibre and Openreach defines the UK altnet vs incumbent dynamic. Comparison is on retail price impact in CityFibre cities.
About CityFibre
CityFibre is the UK's largest independent wholesale XGS-PON full-fibre network, 80+ towns and cities.
About Openreach
Openreach is the BT Group wholesale division operating FTTC and FTTP nationwide.
Pricing comparison
CityFibre-based retail tariffs (Vodafone, TalkTalk, Sky, Zen) typically price gigabit £10 to £20 below equivalent Openreach FTTP retail.
Speed comparison
Both deliver XGS-PON gigabit and multi-gigabit. Functionally similar at the wholesale layer.
Coverage comparison
Openreach is nationwide. CityFibre is in 80+ towns and cities.
Verdict
In CityFibre cities, CityFibre-based retail typically wins on price. Outside, Openreach is the only mainstream wholesale option.
Who each is best for
Consumers in CityFibre cities should compare Vodafone CityFibre, TalkTalk CityFibre and Sky CityFibre against equivalent Openreach FTTP from BT, Sky and Plusnet.
How to switch
- 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: May 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.