BT vs Fibrus broadband
BT is a nationwide Openreach retailer available almost everywhere. Fibrus runs its own full fibre network across Northern Ireland and parts of Cumbria with fixed prices and no mid-contract rises. Your postcode decides whether this is even a contest.
Network split
BT uses national Openreach; Fibrus builds and runs its own FTTP network.
Coverage split
BT is nationwide; Fibrus covers Northern Ireland and parts of Cumbria (around 450,000 premises).
Price rises
BT raises prices £4 each April; Fibrus has no mid-contract rises at all.
Contract length
BT is 24 months; Fibrus is typically 18 months.
Router hardware
Fibrus includes Amazon eero (two on faster tiers); BT ships the Smart Hub 2.
Switching help
Fibrus offers up to £400 contract buyout.
See whether BT, Fibrus or both reach your home
Because Fibrus is regional and BT is national, your address decides whether this is even a contest. Run a postcode check before you compare prices.
Compare BT and Fibrus by postcodeWhat each provider actually is
BT in 2026
BT is the UK's best-known broadband brand, part of BT Group, delivering over the national Openreach network with full fibre up to 900 Mbps plus part fibre and ADSL where full fibre has not arrived. It offers TV, mobile bundles, free Norton protection, Complete Wi-Fi and nationwide support. BT applies a fixed £4 a month rise each April.
Fibrus in 2026
Fibrus is a leading alternative-network (altnet) operator that builds and runs its own full fibre (FTTP) network, focused on rural and underserved areas of Northern Ireland (under the Hyperfast NI brand) and Cumbria, backed by Project Stratum and Project Gigabit. It covers around 450,000 premises, includes Amazon eero routers, guarantees no mid-contract price rises, runs shorter 18-month contracts, and offers a contract buyout of up to £400. Fibrus posts a strong Trustpilot rating (around 4.3 out of 5) and low Ofcom complaint levels (around 3 per 100,000).
Network and coverage: the key difference
This is the heart of the BT vs Fibrus decision, and it comes down to where you live.
- BT is available almost everywhere, because Openreach reaches around 95% of UK premises for part fibre and a growing majority for full fibre. If you want a national brand that will be available at virtually any address, BT qualifies.
- Fibrus only serves postcodes its own network has physically reached, currently much of Northern Ireland and selected parts of Cumbria. In many of those areas, Fibrus is the only genuine full fibre option, often arriving where Openreach full fibre has not.
So the practical question is not "which brand is better in the abstract", but "does Fibrus reach my address?". If it does, you have a real choice; if it does not, BT (or another Openreach retailer) is your route to full fibre.
2026 pricing and total contract cost
Both offer competitive full fibre, but Fibrus's fixed pricing changes the total-cost picture. Indicative 2026 pricing (check your postcode for live figures):
| Tier (average speed) | BT typical price | Fibrus typical price |
|---|---|---|
| Full Fibre ~150 Mbps | From around £28 (rises each April) | From around £22.99 (fixed, no rises) |
| Full Fibre ~300 Mbps | Around £34 to £36 | Around £27 to £30 (fixed) |
| Full Fibre ~500 Mbps | Around £40 | Around £30 to £34 (fixed, two eero routers) |
| Full Fibre ~900 Mbps to 1 Gbps | Around £42 to £45 | Around £35 to £40 (fixed, Total Home WiFi) |
Because Fibrus does not raise prices mid-contract while BT adds £4 a month each April, Fibrus's total contract cost is often meaningfully lower over the term, and its free installation and up to £400 buyout further reduce switching cost.
Price rises and contract terms
This is Fibrus's strongest card.
| Term | BT | Fibrus |
|---|---|---|
| Mid-contract price rises | £4 a month each April (fixed, disclosed) | None, price fixed for the whole term |
| Contract length | 24 months | Typically 18 months |
| Setup and installation | Often free on deals | Free |
| Contract buyout | Occasional reward-card offers | Up to £400 to cover old exit fees |
| Router included | Smart Hub 2 (Wi-Fi 6) | Amazon eero 6 (two on faster tiers) |
If price certainty matters to you, Fibrus's no-rises guarantee and shorter 18-month term are genuinely consumer-friendly, and unusual among UK providers.
Routers and whole-home Wi-Fi
Fibrus supplies Amazon eero mesh routers, with a second eero included on Full Fibre 500 and above to power its Total Home WiFi Guarantee (strong Wi-Fi in every room). Additional eero nodes are available cheaply if needed. BT ships the Smart Hub 2 (Wi-Fi 6), with its Complete Wi-Fi disc system available as an add-on. For whole-home coverage out of the box, Fibrus's bundled eero mesh on faster tiers is a strong offering.
Reliability, complaints and satisfaction
Both run full fibre (FTTP), which is inherently reliable. Fibrus posts low Ofcom complaint levels (around 3 per 100,000) and a strong Trustpilot score (around 4.3 out of 5) with UK-based, locally staffed support, helped by a high network take-up rate. BT, on the national Openreach network, recorded 8 complaints per 100,000 in Ofcom's Q4 2025 data, mid-table and just above the industry average of 7. On the published numbers, Fibrus edges reliability and satisfaction within its footprint, while BT offers the reassurance of a large national operation.
Decision framework: who should choose which
Choose Fibrus if
- It is available at your address in Northern Ireland or Cumbria.
- You want fixed pricing with no mid-contract rises and a shorter 18-month term.
- You value a bundled eero mesh and a whole-home Wi-Fi guarantee on faster tiers.
- You want up to £400 to help buy out your current contract.
Choose BT if
- Fibrus does not reach your postcode (the most common reason).
- You want a national brand with TV, mobile bundles and free Norton protection.
- You need part fibre or ADSL because full fibre has not arrived at your address.
Bottom line: where Fibrus is available, it is often the better value and the better full fibre choice, thanks to fixed pricing, eero hardware and a buyout. Everywhere else, BT's nationwide availability makes it the practical pick. Always start with a postcode check.
Compare BT and Fibrus by postcode
Because Fibrus is regional and BT is national, your address decides whether this is even a contest.
Related routes
BT vs Fibrus FAQs
Is BT or Fibrus better for full fibre?
Where Fibrus reaches your address, it is often the better value, with fixed prices, no mid-contract rises, an eero router and up to £400 buyout. Outside its Northern Ireland and Cumbria footprint, BT wins on nationwide availability. Your postcode decides it.
Where is Fibrus available?
Fibrus runs its own full fibre network across much of Northern Ireland and selected parts of Cumbria in North West England, covering around 450,000 premises. It only serves postcodes its network has physically reached, so availability is location-specific.
Does Fibrus raise prices mid-contract?
No. Fibrus guarantees no mid-contract price rises, so the price you sign up at is fixed for the whole term. By contrast, BT adds a fixed £4 a month rise each April. This makes Fibrus's total cost often lower over the term.
Is Fibrus cheaper than BT?
Often, yes, within its footprint. Fibrus full fibre starts from around £22.99 a month with no price rises, while BT starts higher and rises each April. Fibrus also includes free installation and up to £400 contract buyout, lowering switching cost.
What router does Fibrus give you?
Fibrus supplies an Amazon eero 6 router, with a second eero included on Full Fibre 500 and above to power its Total Home WiFi Guarantee. BT ships the Smart Hub 2 (Wi-Fi 6), with Complete Wi-Fi discs available as an add-on.
How long are Fibrus contracts?
Fibrus contracts are typically 18 months, shorter than BT's standard 24 months, with fixed pricing throughout and free installation. Fibrus also offers a contract buyout of up to £400 to help cover exit fees from your old provider.
Is Fibrus reliable?
Yes. Fibrus runs its own full fibre (FTTP) network, posts low Ofcom complaint levels (around 3 per 100,000), a strong Trustpilot score (around 4.3 out of 5) and UK-based support. Full fibre is inherently more reliable than older copper lines.
Should I switch from BT to Fibrus?
If Fibrus reaches your address and you want fixed pricing, eero whole-home Wi-Fi and a buyout, it is a strong upgrade. If Fibrus does not serve your postcode, BT or another Openreach provider is your route to full fibre. Always check availability first.
References
1. Ofcom complaints Q4 2025
Ofcom. (2026). Latest telecoms and pay-TV complaints revealed: Q4 2025 (published 11 May 2026).
2. Fibrus packages
Fibrus. (2026). Full fibre packages, no mid-contract price rises, and contract buyout.
3. Choose Fibrus review
Choose. (2026). Fibrus broadband: full fibre deals and availability.
4. CompareFibre Fibrus review
CompareFibre. (2026). Fibrus broadband review and deals 2026.