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Openreach FTTP covers most of Cardiff. Ogi (Welsh altnet) is rolling out in select postcodes; CityFibre has central coverage.
Always run an address-level postcode check before signing
The deals below are UK-wide. Coverage in Cardiff varies street by street — even within the same postcode. Run an Ofcom checker or use the provider's own checker before committing.
Cheaper at the top. Click through, run the address check, and switch on the provider's site.
Be Fibre
Openreach FTTP covers most of Cardiff. Ogi (Welsh altnet) is rolling out in select postcodes; CityFibre has central coverage.
Ogi is the dominant local alternative-network provider in Cardiff. Altnets typically offer faster symmetric speeds (matching upload to download) at lower per-Mbps prices than Openreach-based packages — but coverage is concentrated in select postcodes, so always check at your address first.
Postcodes we regularly see well-served: CF10, CF11, CF14, CF24.
Yes — full-fibre coverage in Cardiff is now widespread. Openreach FTTP covers most of Cardiff. Ogi (Welsh altnet) is rolling out in select postcodes; CityFibre has central coverage. Always run an Ofcom postcode check at your specific address before signing a contract, as availability varies street by street.
As of May 2026, the cheapest live deal we track that's potentially available in Cardiff starts at £15.00/month. Final price depends on the postcode-level check at your address.
✓ No setup fee
Major providers using Openreach (BT, Sky, Vodafone, EE, Plusnet, TalkTalk) cover most Cardiff postcodes. Ogi is a strong local altnet alternative often cheaper per Mbps. Run a postcode check to see which apply at your address.
Gigabit (1000 Mbps) full-fibre is available in many Cardiff postcodes via both Openreach FTTP and altnets. Real-world speeds typically come within 90% of advertised speed on full-fibre — check thinkbroadband.com for actual results from neighbours.