Published: June 2026 | Reviewed by the FibreCompare editorial team
BT and Sky are two of the biggest names in UK broadband — and unusually for a head-to-head, they're built on the same foundations. Both deliver their core packages over the Openreach full fibre network, which means at most addresses they're selling near-identical line speeds. So this comparison is really about everything wrapped around the connection: price and reward cards, in-contract rise policies, routers, TV platforms, and customer service. We've compared all of it — with full-contract cost calculations taken from the live deals on FibreCompare, not just headline prices.
| BT | Sky | |
|---|---|---|
| Network | Openreach (FTTP, plus legacy copper/hybrid tiers) | Openreach and CityFibre — pricing varies by which serves your address |
| Entry full fibre | Full Fibre 150 (150Mbps) — £23.99/month | Full Fibre 150 — £23/month (Openreach) or £22/month with £80 gift card (CityFibre) |
| Mid tier | Full Fibre 500 — £29.99/month | Full Fibre 500 — £27/month (Openreach) or £28/month (CityFibre) |
| Near-gigabit | Full Fibre 900 (900Mbps) — £31.99/month | Full Fibre Gigafast (900Mbps) — £30/month (Openreach) or £25/month with £90 gift card (CityFibre) |
| Maximum speed | 900Mbps | 5Gbps (4,900Mbps avg) — £80/month, CityFibre areas |
| Upload speeds | Standard Openreach tiers | Standard on Openreach; symmetrical on CityFibre tiers |
| Reward/gift cards | £65–£150 Reward Card on every deal | £40–£125; larger cards (£80–£105) on CityFibre deals |
| In-contract rises | £4/year on broadband, stated per deal (31 March 2027 & 2028) | Prices may change during the 24-month minimum term |
| Contract | 24 months | 24 months |
| TV platform | BT TV (YouView box, NOW-powered Sky content, TNT Sports) | Sky Stream / Sky Glass (native Sky platform) |
All prices from the live deals tables on our BT and Sky pages, correct at publication.
Winner: Sky — narrowly on Openreach, emphatically in CityFibre areas
The first thing to understand about Sky's pricing is that there isn't one set of it. Sky sells over two networks — Openreach and CityFibre — and both the prices and the gift cards differ depending on which one serves your address. BT sells over Openreach only. So this comparison has two answers.
Where Sky is on Openreach — the like-for-like case — Sky shades BT tier by tier on headline price: £23 vs £23.99 at 150Mbps, £27 vs £29.99 at 500Mbps, £30 vs £31.99 at 900Mbps. Small, consistent gaps.
Where Sky is on CityFibre, the gaps stop being small. Full Fibre Gigafast drops to £25 a month with a £90 gift card — £6.99 under BT's headline and with symmetrical uploads thrown in. Full Fibre 150 is £22 with an £80 card. (Curiously, Full Fibre 500 runs £1 higher on CityFibre at £28 — at that tier, check both.) Sky's hyperfast tiers — 2.5Gb at £35 with a £105 card, 5Gb at £80 with £125 — are CityFibre-only and have no BT answer at all.
Now BT's counterweight: cost structure. BT states its rises upfront — £4 per year on broadband, applied on 31 March 2027 and 2028, printed against every deal — so Full Fibre 900 at £31.99 becomes £35.99 then £39.99, roughly £832 across a 24-month term. And every BT deal carries a Reward Card: £120 on Full Fibre 150 and 300, £150 on Full Fibre 500, £145 on Full Fibre 900. Net the card off and BT Full Fibre 900's effective cost is about £687 — which beats Sky's Openreach Gigafast (£720 if prices don't move, and Sky's deals only commit to "prices may change during the minimum term"). But it can't live with Sky's CityFibre Gigafast: £600 total, £510 after the £90 card — an effective £21.25 a month for 900Mbps.
One critical practical point on BT's Reward Cards: they're not automatic. You must claim them after installation, within the claim window, or the value evaporates — and unclaimed cards are one of the quiet profit centres of UK broadband marketing. If you choose BT because of the card, set a reminder.
The honest summary: in CityFibre areas, Sky wins this category outright — lower prices, bigger gift cards, symmetrical uploads, and a speed ceiling BT can't reach. On Openreach, it's the closer contest we'd expect from two providers on the same network: Sky on headline simplicity, BT on effective full-contract cost for disciplined customers who claim their card, with the added benefit that BT's costs are contractually certain.
Winner: Sky — identical on Openreach, ahead everywhere CityFibre runs
Where both providers are on Openreach, this category is a draw by design: the same tiers — 150, 300, 500, 900Mbps — over the same physical line, with matched uploads. The same engineer might install either.
Sky's second network breaks the tie twice over. In CityFibre areas, Sky's standard tiers come with symmetrical speeds — uploads matching downloads — which BT doesn't offer at any price; for home workers, content creators, and cloud-backup households, 900Mbps up versus BT's standard upload is not a marginal difference. And above the gigabit mark, Sky's CityFibre-only 2.5Gb (2,400Mbps average, £35) and 5Gb (4,900Mbps average, £80) products simply have no BT equivalent.
At the other end, BT still sells legacy tiers for non-fibre addresses — Fibre Essential at 36Mbps and Fibre 2 at 67Mbps (both £24.99) — genuinely useful for homes the full fibre rollout hasn't reached, though note those legacy tiers cost more per megabit than full fibre many times their speed.
Winner: Sky — narrowly
Both providers reach effectively the whole country through Openreach, and both can serve full fibre wherever Openreach has built it. BT's legacy copper and hybrid products give it a marginal edge at the dwindling number of addresses with no fibre option. But Sky's second network tips this category: in the roughly 4.5 million homes CityFibre has passed, Sky offers an entire parallel deals table — often cheaper, symmetrical, and reaching speeds BT can't sell. Being on two networks means Sky can simply offer more at more addresses. Check your postcode to see exactly which deals — and which networks — are available where you live.
Winner: Sky
Sky leads the major providers on service, scoring 82% in Ofcom's 2025 satisfaction survey against BT's 79%, with the lowest complaints rate among the big names — around 6 per 100,000 customers. BT's record is respectable rather than outstanding: consistently mid-pack on complaints, with strong network reliability but more friction reported around billing and contract-end negotiations. Sky's Broadband Guarantee — exit penalty-free if a persistent speed problem isn't fixed within 30 days — adds a layer of protection BT doesn't match.
Both are leagues ahead of the worst performers in the market, but if service is your deciding factor, Sky has the edge. Read more in our BT review and Sky review.
Winner: Sky — unless TNT Sports is your priority
This is the category with the deepest philosophical difference between the two.
Sky's platform is native: Sky Stream (the plug-in puck) or Sky Glass (the TV with it all built in), carrying Sky's own content estate — Sky Atlantic, Sky Originals, Sky Sports, Sky Cinema — plus Netflix bundled into its TV packages. On FibreCompare's current deals, Sky Stream with Essential TV, Netflix and Full Fibre 150 is £35 a month; adding the full Sky Sports lineup takes it to £55, with a £70 gift card included.
BT TV takes the aggregator route: a YouView set-top box with Freeview channels, TNT Sports natively, and Sky content delivered through bundled NOW memberships — Entertainment packages carry NOW Entertainment (Sky Atlantic, Sky Max and more) plus Netflix, while Sport packages carry TNT Sports. Current FibreCompare deals: Entertainment TV with Netflix and Full Fibre 150 at £41.99, or Sport TV with Full Fibre 150 at £43.99, both with three months of Apple TV+ thrown in. Note that BT's TV bundles carry steeper rises than its broadband — £6 a year rather than £4 — so the full-contract gap versus Sky widens on TV deals.
Two genuine BT advantages: the YouView box records (up to 600 hours) and pauses live TV, which Sky Stream — a streaming-only device — doesn't do in the traditional sense; and TNT Sports is native to BT's Sport package, making BT the natural home for Champions League and Premier League rights that sit with TNT. Sky counters with the stronger overall platform, the bigger content estate, and cleaner pricing.
Sports households should do one specific sum: BT Sport TV + Full Fibre 150 at £43.99 gets you TNT Sports; Sky's Sports bundle at £55 gets you the full Sky Sports portfolio. Which rights matter to you decides this category more than any general verdict can. Compare live options on our TV and broadband deals page.
Winner: BT — narrowly
BT's Smart Hub 2 has long been regarded as one of the strongest ISP-supplied routers in the UK — seven antennae, strong signal reach, and the foundation of BT's "UK's most powerful WiFi signal" claim. Its Complete WiFi add-on extends coverage with mesh discs and a room-by-room guarantee. Entry-level legacy packages ship with the more basic Home Hub, so as ever, check which unit your tier includes.
Sky's lineup runs from the capable Sky Broadband Hub through the WiFi 6 Max Hub to the WiFi 7 Gigafast+ Hub on its CityFibre hyperfast tiers, with the WiFi Max add-on providing mesh Pods and a room-by-room speed guarantee. At the hyperfast end, Sky's hardware is actually the more advanced — but across the mainstream tiers where most people buy, BT's standard-issue hub has the better reputation for raw coverage, which is what most households actually notice.
Geoff Pestell, CEO of FibreCompare, gave his verdict:
"BT versus Sky used to be the comparison where the marketing mattered more than the network, because it was the same network. That's no longer quite true — and it's the most important thing in this matchup. Sky now sells over two networks, and in CityFibre areas it's effectively a different, stronger provider: cheaper at the headline, bigger gift cards, symmetrical uploads, and speeds BT doesn't sell at all. The first question isn't 'BT or Sky?' — it's 'which networks reach my address?', because the answer changes the entire comparison.
On Openreach, where it really is like-for-like, the reward card point deserves emphasis because it cuts both ways. Run the full 24-month numbers with the cards netted off and BT is, on several tiers, the cheaper provider despite looking more expensive — but only if you actually claim the card. Huge numbers of people don't, and the deal economics quietly depend on that. If you're organised, BT's value is better than it looks. If you know you won't get around to it, judge BT on the headline price alone.
My practical steer: CityFibre-area households should start with Sky's deals table and ask whether BT can answer it — usually it can't. On Openreach, service-first households and anyone wanting Sky's TV ecosystem should lean Sky; sports fans should choose on rights — TNT means BT, the full Sky Sports portfolio means Sky. And everyone should remember these two are far from the only options at most addresses — challengers sell the same Openreach line for less, which is exactly why it pays to compare the full market at your postcode before defaulting to a big brand."
Choose BT if:
Choose Sky if:
Bottom line: in CityFibre areas this isn't close — Sky wins on price, uploads, speed ceiling, and gift cards, and BT has no structural answer. On Openreach it's the tighter contest you'd expect from two brands on the same line: Sky takes price simplicity, service, and TV; BT wins on effective cost for organised customers who claim their reward card, on rise certainty, and on TNT Sports. Either way, the first step is the same: find out which networks and deals reach your address before choosing between the brands on top of them.
Is BT or Sky cheaper? It depends on which network serves your address. In CityFibre areas, Sky is clearly cheaper — Gigafast at £25 vs BT Full Fibre 900 at £31.99, with bigger gift cards. On Openreach, Sky is cheaper on headline price (£27 vs £29.99 at 500Mbps) but BT's £120–£150 Reward Cards mean its effective full-contract cost beats Sky on several tiers — provided you claim the card. BT's £4 annual rises are fixed and stated per deal; Sky's deals note prices may change during the minimum term.
Are BT and Sky on the same network? Partly. Both deliver full fibre over Openreach, where the underlying line and speeds are identical. But Sky also sells over CityFibre — with different (often lower) prices, larger gift cards, symmetrical uploads, and hyperfast tiers up to 5Gbps that BT doesn't offer. Whether Sky's CityFibre deals are available depends entirely on your address.
Can I get Sky TV with BT broadband, or TNT Sports with Sky? Yes to both. Sky Stream works over any broadband connection, including BT's. TNT Sports is available as an add-on through Sky and other platforms, though it's native to BT TV's Sport packages. You're not locked into either provider's broadband to get the other's headline sports content.
Do BT's Reward Cards arrive automatically? No — you must claim your BT Reward Card after your service starts, within the claim window. Unclaimed cards expire worthless, so set a reminder; the card is a meaningful part of the deal's value.
Is it easy to switch between BT and Sky? Yes — both are on Openreach, making this one of the simplest switches in UK broadband. Under One Touch Switch, your new provider handles the entire process, usually with minimal downtime on changeover day.
Prices and details correct at time of publication, June 2026, taken from the live deals tables on FibreCompare. Enter your postcode to compare current BT and Sky deals at your address.
Tags: BT Broadband, Sky Broadband, BT vs Sky, Broadband Comparison, Full Fibre, Openreach, Reward Cards, Sky Stream, BT TV, TNT Sports, Broadband Deals 2026
