19 providers offer 289 broadband deals in Marconi, from £13.50 a month and up to 5,000 Mbps. Typical measured speed is 113 Mbps down and 25 Mbps up, 12% above the UK download average.
Best value broadband deal in Marconi, Chelmsford (CM1)
The best value in Marconi, Chelmsford (CM1) 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 Marconi, Chelmsford (CM1)
£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 Marconi, Chelmsford (CM1)
The fastest deal available in Marconi, Chelmsford (CM1) is Full Fibre 5 Gigafast+ from Sky at 5,000 Mbps.
Fastest in Marconi, Chelmsford (CM1)
Full Fibre 5 Gigafast+
3000 Mbps upload · Full Fibre
Best for power users & big households
£80/mo
No rises, no surprises.
£1925 total over 24 months
Cheapest broadband deal in Marconi, Chelmsford (CM1)
The cheapest deal in Marconi, Chelmsford (CM1) is 150Mb Full Fibre CityFibre (24 Months) from 4th Utility at £13.50 a month for 150 Mbps. It's full fibre, so the advertised speed is the speed that reaches the router. The £13.50 is an intro price that rises to £18.00 a month after the intro window, making the real first-year cost £162. Above the UK average on download.
Cheapest in Marconi, Chelmsford (CM1)
150Mb Full Fibre CityFibre (24 Months)
150 Mbps upload · Full Fibre
Best for 2–3 person homes, 4K streaming
£13.50/mo
for 12 months, then £18/mo
Avg £15.75/mo over contract · £378 total over 24 months
Compare broadband deals in Marconi, Chelmsford (CM1)
250Mb Full Fibre CityFibre (24 Months)
250 Mbps upload · Full Fibre
Best for 2–3 person homes, 4K streaming
£16.50/mo
for 12 months, then £22/mo
Avg £19.25/mo over contract · £462 total over 24 months
£29/mo
rises to £31 in April 2027 (+£2)
Avg £30.50/mo over contract · £732 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
150Mb Full Fibre CityFibre (24 Months)
150 Mbps upload · Full Fibre
Best for 2–3 person homes, 4K streaming
£18.50/mo
for 12 months, then £23.50/mo
Avg £21/mo over contract · £504 total over 24 months
Broadband providers in Marconi, Chelmsford (CM1)
19 providers serve Marconi, Chelmsford (CM1), with Sky the fastest at 5,000 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 Marconi, Chelmsford (CM1) download speed at 113 Mbps.
Upgrade nudge
Room to upgrade in Marconi, Chelmsford (CM1)
Only 17% of the 22,000 connections here are on 300Mbps or faster, even though 92% 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 Marconi, Chelmsford (CM1) line runs 113 Mbps.
Working from home
OKStreaming and family use
GoodWhat speeds are people actually getting?
Gigabit reaches 92% of Marconi, Chelmsford (CM1), and the fastest available is 1,000 Mbps. The full split by band is below.
Which broadband networks reach Marconi, Chelmsford (CM1)?
The wholesale networks carrying Marconi, Chelmsford (CM1) broadband, from Openreach to Virgin Media and the altnets, read off the live deals.
Full-fibre altnets that have rolled out in Marconi, Chelmsford (CM1). They don't reach every address, but where they do, the gigabit pricing is normally sharper than the Openreach equivalent.
- 4th Utility: 4th Utility, Rise Fibre
- CityFibre: Sky, The One Broadband, Vodafone
- Hyperoptic
Plus Openreach and Virgin Media O2 (Openreach covers virtually every UK premises, so it'll reach you).
Today's live count in Marconi, Chelmsford (CM1): 19 providers on the page.
What broadband coverage does Marconi, Chelmsford (CM1) have?
Superfast broadband reaches 97% of Marconi, Chelmsford (CM1) premises and gigabit 92%, on Ofcom's premise-level data.
Can I rely on mobile broadband in Marconi, Chelmsford (CM1)?
Outdoor 5G reaches 100% of Marconi, Chelmsford (CM1) homes. Here is how mobile holds up if the line drops.
5G & 4G home broadband
Outdoor 5G covers 100% of Marconi, Chelmsford (CM1), enough for a 5G home-broadband hub to stand in for a fixed line.
How Marconi, Chelmsford (CM1) compares within Chelmsford
Across 3 postcode districts in Chelmsford, by premises count, typical speed and gigabit coverage.
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 Marconi, Chelmsford (CM1)come 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.