19 providers offer 224 broadband deals in Caerphilly, from £20 a month (£40 after 12 months) and up to 7,000 Mbps. Typical measured speed is 66 Mbps down and 18 Mbps up, 35% below the UK download average. Full fibre is available to 84.4% of homes.
Deals for Caerphilly, checked and refreshed daily.
Best value broadband deal in Caerphilly
The best value in Caerphilly on full first-year cost is 4th Utility's 900Mb Full Fibre (24 Months): £264 across year one, about £22 a month. At 900 Mbps it copes with anything a household runs at once.
Best value in Caerphilly
£22/mo
for 12 months, then £44/mo
Cheapest broadband deal in Caerphilly
The cheapest deal in Caerphilly is 300Mb Full Fibre (24 Months) from 4th Utility at £20.00 a month for 300 Mbps. It's full fibre, so the advertised speed is the speed that reaches the router. The £20.00 is an intro price that rises to £40.00 a month after the intro window, making the real first-year cost £240. YouFibre is essentially level at £20.00 a month.
Cheapest in Caerphilly
£20/mo
for 12 months, then £40/mo
Runner-up on price
£20/mo
No rises, no surprises.
Fastest broadband deal in Caerphilly
The fastest deal available in Caerphilly is You 8000 from YouFibre at 7,000 Mbps. Next fastest is Gig2 Fibre broadband + Netflix from Virgin Media O2 at 2,000 Mbps.
Fastest in Caerphilly
£50/mo
No rises, no surprises.
Runner-up on speed
Gig2 Fibre broadband + Netflix
£51.99/mo
rises to £55.99 in April 2027 (+£4)
Compare broadband deals in Caerphilly
£22.99/mo
rises to £26.99 in March 2027 (+£4)
£23/mo
No rises, no surprises.
£25.99/mo
rises to £29.99 in March 2027 (+£4)
£23.99/mo
rises to £27.99 in March 2027 (+£4)
Broadband providers in Caerphilly
19 providers serve Caerphilly including Virgin Media, Sky and BT, with YouFibre the fastest at 7,000 Mbps.
Ranked by Ofcom complaints per 100,000 customers, fewest first. A down arrow is below the industry average, up is above, and a dash means Ofcom publishes no figure for that provider (usually because it is below Ofcom's 1.5% market-share reporting threshold). A small diagonal arrow shows the past-year trend (↘ improving, ↗ getting worse).
Ofcom records the typical Caerphilly download speed at 66 Mbps.
Upgrade nudge
Room to upgrade in Caerphilly
Only 6% of the 48,000 connections here are on 300Mbps or faster, even though 84% can get gigabit.
The faster line is already there. For most of these homes it is the contract holding them back, not the infrastructure.
Is your broadband good enough?
The typical Caerphilly line runs 66 Mbps.
Working from home
OKStreaming and family use
OKWhat speeds are people actually getting?
Gigabit reaches 84% of Caerphilly, and the fastest available is 1,000 Mbps. The full split by band is below.
What broadband coverage does Caerphilly have?
Superfast broadband reaches 97% of Caerphilly premises but gigabit only 84%, so around 13% of homes can get fast broadband but not the fastest.
Can I rely on mobile broadband in Caerphilly?
Outdoor 5G reaches 100% of Caerphilly homes. Here is how mobile holds up if the line drops.
The two 5G figures differ. “5G availability” is everyday 5G running on the existing 4G core, which is what most phones show. “Next-gen 5G” is standalone 5G: a full 5G network with lower lag, still reaching fewer places.
5G & 4G home broadband
Outdoor 5G covers 100% of Caerphilly, enough for a 5G home-broadband hub to stand in for a fixed line.
Broadband speeds by Caerphilly neighbourhood
Measured speeds range from 75 Mbps in Penyrheol to 52 Mbps in New Tredegar, so your street matters more than the Caerphilly average.
| Neighbourhood | Median | vs area | Upload | Superfast | Gigabit | 5G |
|---|---|---|---|---|---|---|
| Penyrheol CF83 | 75 | +9 | 19 | 98% | 89% | 100% |
| Newbridge NP11 | 68 | +2 | 19 | 97% | 87% | 100% |
| Ystrad Mynach CF82 | 59 | -8 | 15 | 98% | 75% | 100% |
| Blackwood NP12 | 59 | -8 | 16 | 97% | 88% | 100% |
| Aberbargoed and Bargoed CF81 | 57 | -9 | 15 | 99% | 76% | 100% |
| New Tredegar NP24 | 52 | -14 | 13 | 96% | 70% | 100% |
Measured Ofcom data per Caerphilly neighbourhood, ranked fastest first. Median and upload are in Mbps; vs area is the median difference from the Caerphilly average; superfast, gigabit and 5G are the % of premises covered. Swipe the table sideways for more columns.
Postcode districts in Caerphilly
Towns in Caerphilly
Nearby areas
Frequently asked questions
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Speed and coverage figures for Caerphillycome from Ofcom's Connected Nations data, current to January 2026. Deal prices are pulled live from providers. Compiled by the FindBroadband team. See how we rank and source our data.