18 providers offer 213 broadband deals in St Mabyn, from £20.00 a month and up to 1,600 Mbps. Typical measured speed is 81 Mbps down and 21 Mbps up, 20% below the UK download average.
Best value broadband deal in St Mabyn, Cornwall
The best value in St Mabyn, Cornwall 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 St Mabyn, Cornwall
£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 St Mabyn, Cornwall
The fastest deal available in St Mabyn, Cornwall is Full Fibre 1.6GB Premium from EE at 1,600 Mbps.
Fastest in St Mabyn, Cornwall
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
Cheapest broadband deal in St Mabyn, Cornwall
The cheapest deal in St Mabyn, Cornwall 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. Onestream is essentially level at £20.63 a month.
Cheapest in St Mabyn, Cornwall
300Mb Full Fibre (24 Months)
300 Mbps upload · Full Fibre
Best for 4–5 person households, heavy use
£20/mo
for 12 months, then £40/mo
Avg £30/mo over contract · £720 total over 24 months
Runner-up on price
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
Compare broadband deals in St Mabyn, Cornwall
£21/mo
rises to £24 in April 2027 (+£3)
Avg £23.25/mo over contract · £558 total over 24 months
Gig1 Broadband Only
41 Mbps upload · Hybrid Fibre-Coaxial
Best for power users & big households
£25.99/mo
rises to £29.99 in April 2027 (+£4)
Avg £28.99/mo over contract · £696 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 St Mabyn, Cornwall
18 providers serve St Mabyn, Cornwall, with EE the fastest at 1,600 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 St Mabyn, Cornwall download speed at 81 Mbps.
Upgrade nudge
Room to upgrade in St Mabyn, Cornwall
Only 9% are on 300Mbps or faster, even though 71% 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 St Mabyn, Cornwall line runs 81 Mbps.
Working from home
OKStreaming and family use
GoodWhat speeds are people actually getting?
Gigabit reaches 71% of St Mabyn, Cornwall, and the fastest available is 1,000 Mbps. The full split by band is below.
Which broadband networks reach St Mabyn, Cornwall?
The wholesale networks carrying St Mabyn, Cornwall broadband, from Openreach to Virgin Media and the altnets, read off the live deals.
Altnets present in St Mabyn, Cornwall, derived from who is actually selling into addresses here. Worth checking your specific address because their footprints can stop and start a few doors apart.
- CityFibre: Sky, The One Broadband, Vodafone
- 4th Utility: 4th Utility, Rise Fibre
Layered on top, Openreach and Virgin Media O2 also reach this area (Openreach reaches every address that a postman can find).
Provider competition in St Mabyn, Cornwall: 18 providers actively in the market.
What broadband coverage does St Mabyn, Cornwall have?
Superfast broadband reaches 94% of St Mabyn, Cornwall premises but gigabit only 71%, so around 23% of homes can get fast broadband but not the fastest.
Can I rely on mobile broadband in St Mabyn, Cornwall?
Outdoor 5G reaches 90% of St Mabyn, Cornwall, but 2% of homes get no indoor 4G from any network, so a mobile backup here wants a window.
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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 St Mabyn, Cornwallcome 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.