22 providers offer 255 broadband deals in Castle Cary, from £15.00 a month and up to 7,000 Mbps. Typical measured speed is 68 Mbps down and 39 Mbps up, 33% below the UK download average.
Best value broadband deal in Castle Cary, Somerset
The best value in Castle Cary, Somerset 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 Castle Cary, Somerset
£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 Castle Cary, Somerset
The fastest deal available in Castle Cary, Somerset 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 Castle Cary, Somerset
£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 Castle Cary, Somerset
The cheapest deal in Castle Cary, Somerset 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 Castle Cary, Somerset
£5/mo
for 6 months, then £25/mo
Avg £20/mo over contract · £480 total over 24 months
Compare broadband deals in Castle Cary, Somerset
£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
£19/mo
No rises, no surprises.
£342 total over 18 months
Broadband providers in Castle Cary, Somerset
22 providers serve Castle Cary, Somerset, 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 Castle Cary, Somerset download speed at 68 Mbps.
Upgrade nudge
Room to upgrade in Castle Cary, Somerset
Only 7% of the 1,200 connections here are on 300Mbps or faster, even though 85% 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 Castle Cary, Somerset line runs 68 Mbps.
Working from home
OKStreaming and family use
OKWhat speeds are people actually getting?
Gigabit reaches 85% of Castle Cary, Somerset, and the fastest available is 1,000 Mbps. The full split by band is below.
Which broadband networks reach Castle Cary, Somerset?
The wholesale networks carrying Castle Cary, Somerset broadband, from Openreach to Virgin Media and the altnets, read off the live deals.
Apart from Openreach, here is the network roster for Castle Cary, Somerset. The smaller altnets are normally the cheapest gigabit when they reach you, and the most patchy when they don't.
- CityFibre: Sky, The One Broadband, Vodafone
- Truespeed
- 4th Utility: 4th Utility, Rise Fibre
- Airband
Underpinning the deal mix, Openreach and Virgin Media O2 reach the bulk of addresses (Openreach is everywhere in the UK by default).
There are 22 providers on the live deal list for Castle Cary, Somerset.
What broadband coverage does Castle Cary, Somerset have?
Superfast broadband reaches 99% of Castle Cary, Somerset premises but gigabit only 85%, so around 14% of homes can get fast broadband but not the fastest.
Can I rely on mobile broadband in Castle Cary, Somerset?
Outdoor 5G reaches 95% of Castle Cary, Somerset homes. Here is how mobile holds up if the line drops.
More areas in Somerset
Nearby areas
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 Castle Cary, Somersetcome 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.