Compare broadband deals across Portsmouth from 18 providers, with prices from £14.00/month.
Data sources: Pricing & Providers by Switchity | Coverage statistics provided by ThinkBroadband Labs.
To show you these deals, we've used postcode PO4 9AD as a benchmark. Use our postcode checker to see exact speeds and availability for your specific home.
Portsmouth's broadband landscape divides along geographic lines, with the northern mainland generally offering stronger full fibre coverage than Portsea Island itself. The Gosport peninsula stands out for its independent network availability, though major provider coverage remains patchier there.
Southsea and Old Portsmouth benefit from overlapping networks including Virgin Media, CityFibre, and independent providers, giving residents excellent choice across multiple ultrafast options. Cosham and Portchester have strong full fibre availability from Openreach alongside Virgin Media cable, making them reliable choices for house-hunters prioritising connectivity. Fratton and Copnor show more mixed results, with Virgin Media present but full fibre coverage less comprehensive than neighbouring areas. The Gosport peninsula including Alverstoke, Lee-on-the-Solent, and Stubbington relies heavily on independent fibre networks rather than mainstream providers, though these often deliver competitive speeds and pricing. Drayton and Farlington face coverage gaps across both Virgin Media and CityFibre networks, leaving residents more dependent on Openreach infrastructure.
Independent customer ratings pulled from Trustpilot.
Enter your postcode in our broadband postcode checker to see which providers serve your specific address and compare their available packages.
Independent fibre providers have built extensive networks across Portsmouth, particularly strong in the Gosport peninsula covering Alverstoke, Lee-on-the-Solent, and Stubbington, as well as good presence in Fareham, Portchester, and Havant. CityFibre offers particularly wide coverage across Portsea Island including Portsmouth city centre, Southsea, Fratton, and Old Portsmouth, plus Hilsea, Cosham, Havant, and Bedhampton. Residents in CityFibre areas can access competitive packages from Sky, Vodafone, Zen, toob, and Cuckoo. The combination of networks means many Portsmouth postcodes benefit from genuine provider competition.
Here is a breakdown of the network coverage available across 98,971 premises in Portsmouth, benchmarked directly against current UK national averages.
Portsmouth sits well above national averages for ultrafast connectivity, with nearly 97% gigabit coverage giving most residents access to speeds that handle multiple users and devices comfortably. The strong independent network presence at 74% creates genuine competition in many neighbourhoods, often pushing prices down as providers compete for customers. Only around 1% of premises remain stuck on basic ADSL, meaning the city has largely completed its transition to modern broadband technologies. The variation comes down to which specific networks serve your postcode rather than whether fast broadband exists at all.
Data sources: Coverage statistics provided by ThinkBroadband Labs (Correct as of May 2026).
The four things worth checking before you commit to a 24-month contract.
Portsmouth's 18 active broadband providers keep prices competitive. Right now the best value deal is Three's Three 4G Hub (24m) at £14.00 a month for 10Mbps on a 24-month contract. Compare the effective monthly cost (including any setup fees and rewards) to find the true cheapest deal.
The fastest full-fibre broadband deal in Portsmouth is Sky's Full Fibre 5 Gigafast+ at 5000Mbps for £80.00 a month. Ideal for households running multiple 4K streams, video calls or large file transfers.
Thanks to Ofcom’s One Touch Switch, changing providers in Portsmouth requires just a single request. Simply sign up with your new supplier and they will manage the cancellation of your old contract automatically.
No more retention calls; just a seamless switch.
Check your Early Termination Fee (ETF) with our calculator to see if switching saves you money overall. Some providers will even pay this fee for you. Alternatively, use your estimate to haggle a better deal with your current provider.
ETF calculatorPricing and package availability in Portsmouth are based on Switchity's real-time analysis of active deals from our panel of 18+ UK providers in postcode PO4 9AD.
Every successful switch through Switchity plants 2 trees through our verified reforestation partner, Ecologi. Our switchers have already captured over 6,000 kg of CO₂ and released nearly 30,900 kg of oxygen annually.
Every switch through Switchity supports reforestation and saves our community money on their broadband.
