22 providers offer 244 broadband deals in Tongwynlais, from £15.00 a month and up to 7,000 Mbps. Typical measured speed is 65 Mbps down and 16 Mbps up, 36% below the UK download average.
Best value broadband deal in Tongwynlais, Cardiff
The best value in Tongwynlais, Cardiff on full first-year cost is Plusnet's Full Fibre 145: £292 across year one, about £24 a month. A £155 reward card is bundled in. 145 Mbps covers streaming, video calls and working from home.
Best value in Tongwynlais, Cardiff
£22.99/mo
rises to £26.99 in March 2027 (+£4)
Avg £26.32/mo over contract · £632 total over 24 months
Fastest broadband deal in Tongwynlais, Cardiff
The fastest deal available in Tongwynlais, Cardiff 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 Tongwynlais, Cardiff
£99/mo
No rises, no surprises.
£1188 total over 12 months
Runner-up on speed
Gig2 Fibre broadband + Netflix
200 Mbps upload · Hybrid Fibre-Coaxial
Best for power users & big households
£51.99/mo
rises to £55.99 in April 2027 (+£4)
Avg £54.99/mo over contract · £1320 total over 24 months
Cheapest broadband deal in Tongwynlais, Cardiff
The cheapest deal in Tongwynlais, Cardiff is Fast 24m from giffgaff at £5.00 a month for 200 Mbps. It's full fibre, so the advertised speed is the speed that reaches the router. The £5.00 is an intro price that rises to £25.00 a month after the intro window, making the real first-year cost £180. Comfortably faster than the UK average.
Cheapest in Tongwynlais, Cardiff
£5/mo
for 6 months, then £25/mo
Avg £20/mo over contract · £480 total over 24 months
Compare broadband deals in Tongwynlais, Cardiff
£5/mo
for 6 months, then £28/mo
Avg £22.25/mo over contract · £534 total over 24 months
Full Fibre 1.6GB Premium
115 Mbps upload · Full Fibre
Best for power users & big households
£33.99/mo
rises to £37.99 in March 2027 (+£4)
Avg £37.32/mo over contract · £896 total over 24 months
Sky Full Fibre Gigafast
100 Mbps upload · Full Fibre
Best for power users & big households
£31/mo
No rises, no surprises.
£749 total over 24 months
Onestream Fibre 55
10 Mbps upload · Hybrid Fibre
Best for small homes, single 4K streamer
£19.94/mo
rises to £22.69 in April 2027 (+£2.75)
Avg £22/mo over contract · £528 total over 24 months
Broadband providers in Tongwynlais, Cardiff
22 providers serve Tongwynlais, Cardiff, 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 Tongwynlais, Cardiff download speed at 65 Mbps.
Upgrade nudge
Room to upgrade in Tongwynlais, Cardiff
Only 5% are on 300Mbps or faster, even though 88% 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 Tongwynlais, Cardiff line runs 65 Mbps.
Working from home
OKStreaming and family use
OKWhat speeds are people actually getting?
Gigabit reaches 88% of Tongwynlais, Cardiff, and the fastest available is 1,000 Mbps. The full split by band is below.
Which broadband networks reach Tongwynlais, Cardiff?
The wholesale networks carrying Tongwynlais, Cardiff broadband, from Openreach to Virgin Media and the altnets, read off the live deals.
Live altnets in Tongwynlais, Cardiff, drawn from the providers actually selling deals here. Where they reach, the gigabit prices are normally the lowest on the page.
- CityFibre: Sky, The One Broadband, Vodafone
- Hyperoptic
- 4th Utility: 4th Utility, Rise Fibre
And the major networks: Openreach and Virgin Media O2 both reach this area (Openreach is the default network, in case the rest haven't reached your street).
22 providers compete for Tongwynlais, Cardiff broadband customers right now.
What broadband coverage does Tongwynlais, Cardiff have?
Superfast broadband reaches 97% of Tongwynlais, Cardiff premises but gigabit only 88%, so around 9% of homes can get fast broadband but not the fastest.
Can I rely on mobile broadband in Tongwynlais, Cardiff?
Outdoor 5G reaches 100% of Tongwynlais, Cardiff homes. Here is how mobile holds up if the line drops.
5G & 4G home broadband
Outdoor 5G covers 100% of Tongwynlais, Cardiff, enough for a 5G home-broadband hub to stand in for a fixed line.
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Frequently asked questions
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* Based on Go.Compare research estimating that 28% of UK broadband users pay for faster broadband speeds than they need (which we interpret as overpaying), equivalent to around 7.5m UK households.
Speed and coverage figures for Tongwynlais, Cardiffcome 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.