Updated September 30, 2026 · TariffCue Editorial Team
Lightning Fibre vs OiSTER
What sets them apart
| Compare |  Lightning Fibre |  OiSTER |
|---|---|---|
| Top download speed (Mbps) | 10,000Higher | 25 to 954 |
| Upload speed (Mbps) | 900Higher | 23 to 94 |
| Price from | £24 | DKK 18 |
| Reference plan prices | Ultra Lightning 150Mb: GBP24 per month, 150Mb, 24 months | Ultra Lightning Plus 500Mb: GBP34 per month, 500Mb, 24 months | Hyper Lightning 1Gb: GBP39 per month, 900Mb avg, 24 months | Basic: 25 kr/md, pay-as-you-go, no binding; Fri tale 100 GB: 18 kr/md promo then 109 kr/md, 100GB, 1 month; Fri tale Fri data: 49 kr/md promo then 199 kr/md, unlimited, 1 month |
| Setup fee | £0 to £150 | DKK 0 |
| Price after contract | £34 to £49 | DKK 279 |
| Router | 10Gbps Modem and WiFi 6 Mesh Router Included | Vantiva Falcon 5G loan router included, must be returned |
| Address checker | https://portal.lightningfibre.co.uk/getbroadband | https://oister.dk/internet/#tjekadresse |
| Markets | GB | DK |
| Mid-contract price rises | No price rise during contract term | Not confirmed |
| Exit fee terms | Not confirmed | Mobile broadband cancellable anytime with 30 days notice; 5G Internet 6-month tie-in |
| Data cap (GB) | Not confirmed | 10 to 1,000 |
| Static IP | Yes | Not confirmed |
| Social tariff | Yes | Not confirmed |
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Key differences
- OiSTER scores higher overall: 9.3 vs 9.2.
- Top download speed (Mbps) is higher at Lightning Fibre: 10,000 vs 25 to 954.
- Upload speed (Mbps) is higher at Lightning Fibre: 900 vs 23 to 94.
- Support channels: only OiSTER offers Chat.
- Technology: only Lightning Fibre offers Fttp.
- Technology: only OiSTER offers 5G.
- Contract length: only Lightning Fibre offers 12, 24.
- Markets: only Lightning Fibre offers GB.
- Markets: only OiSTER offers DK.
Our verdict on each
Lightning Fibre
Lightning Fibre suits UK households wanting full fibre, high upload speeds and no in-term price rise. Entry pricing starts at £24 with rank 61, and a modem plus mesh router come as standard. Renewal pricing needs weighing before you commit.
OiSTER
OiSTER is a rolling Danish MVNO that suits households wanting a month-to-month bill, sim only plans and an unlimited option at DKK 49 a month. It is a weaker choice than the cheapest listings on entry price, so buyers shopping purely on the headline figure should look elsewhere first.
Score breakdown
| Area | Lightning Fibre | OiSTER |
|---|---|---|
| Cost | 9.2Entry pricing starts at £24 and setup fees run £0 to £150, with rank 61 on entry price. | 9.8HigherEntry at DKK 18 a month and unlimited at DKK 49, though the Fri tale plans rise on renewal after an introductory rate. |
| Offer | 9.1Max download of 10,000 Mbps, upload of 900 Mbps, a modem and mesh router included, and rank 1 on speed. | 9.1Sim only, eSIM and wifi calling all present, plus a multi line discount, 5G technology and data allowances of 10 to 1,000 GB. |
| Trust | Not confirmed | 8.7A long-standing operator: Hi3G Denmark ApS in DK since 2008, selling as an MVNO rather than a network. |
Licences and countries
| Country | Lightning Fibre | OiSTER |
|---|---|---|
| Headquarters | United Kingdom | Denmark |
Additional countries for Lightning Fibre: 1. Additional countries for OiSTER: 1.
How they place
| Ranking | Lightning Fibre | OiSTER |
|---|---|---|
| Broadband providers | 45 of 124 | 35 of 124 |
| Broadband without a long contract | 20 of 46 | 14 of 46 |
Every fact side by side
| Fact | Lightning Fibre | OiSTER |
|---|---|---|
| Technology | Fttp | 5G |
| Contract length | 1, 12, 24Covers more | 1 |
| Legal entity | LF Holdco2 Ltd t/a Lightning Fibre | Hi3G Denmark ApS |
| Headquarters | United Kingdom | Denmark |
| Founded | Not confirmed | 2008 |
| Support channels | Email, Phone, Help centre | Phone, Email, Chat, Help centreCovers more |
Where each stands against the rest
| Fact | Lightning Fibre | OiSTER | Median |
|---|---|---|---|
| Top download speed (Mbps) | 10,000highest quarter | 25 to 954lowest quarter | 1,000 |
| Upload speed (Mbps) | 900at the median | 23 to 94lowest quarter | 900 |
| Data cap (GB) | Not confirmed | 10 to 1,000below the median | 15 |
Median across 116 listed providers.
Pros and cons
Lightning Fibre
Pros
- Max download of 10,000 Mbps and upload of 900 Mbps put it at rank 28 on upload, ahead of most full fibre rivals.
- No price rise during the contract term, so the £24 entry price holds for the whole term.
- Setup fees run £0 to £150, and rank 1 on setup fee puts it at the top of the field.
Cons
- Renewal pricing after the contract climbs to £34 to £49, ranking 14 on post contract price.
- Plan terms run 1, 12 and 24, so the longer options tie you in for a long stretch.
- Support runs on email, phone and help centre only, with no live chat listed.
OiSTER
Pros
- The unlimited Fri tale Fri data plan is listed at DKK 49 a month, which ranks 13 of 173 on unlimited price.
- Rolling billing at 1 month, with Basic available pay-as-you-go and no binding period.
- Sim only, eSIM, wifi calling and a multi line discount are all available, on 5G technology.
Cons
- The DKK 18 entry price ranks 43 of 258 on the listings compared, so entry pricing is mid-table rather than the cheapest on offer.
- The Fri tale plans are published at a promotional rate before a higher standard rate, so the ongoing cost on the same plan name is the figure to budget.
- Coverage is limited to DK, so residents outside that market have nothing here to switch to.
Who each suits
Lightning Fibre
Who it suits
- Households already inside Lightning Fibre's build area who want symmetrical fibre speeds
- Anyone sending large uploads for work, streaming or backups, given the 900 Mbps figure
- Buyers who want the price held flat through the term and a router in the box
Who should look elsewhere
- Buyers who want short terms, since plan terms run 1, 12 and 24
- Anyone outside GB, where the service does not reach
- Households priced purely on renewal cost, where post contract pricing sits at £34 to £49
OiSTER
Who it suits
- Households in DK that want a rolling monthly bill and can cancel mobile broadband with notice.
- Readers who want unlimited data at DKK 49 a month rather than the cheapest possible entry price.
- Families running more than one line, since a multi line discount applies alongside eSIM setup for a new handset.
Who should look elsewhere
- Anyone who wants to buy from the network operator instead of an MVNO: GETESA, Lonestar Cell MTN and yesss! all sell as networks.
- Shoppers ranking purely on the lowest price from, since DKK 18 sits at position 43 of 258 and yesss! or GETESA belong on the same shortlist for that column.
Country by country
| Country | Lightning Fibre | OiSTER |
|---|---|---|
| Denmark | No | Yes |
| United Kingdom | Yes | No |
Questions about each
Lightning Fibre
What does Lightning Fibre cost to start?+
Entry pricing starts at £24, and that is the introductory rate for a fixed term rather than a permanent price. Setup fees run £0 to £150 depending on the line. After the term, prices move to £34 to £49, so budget for that step when comparing against cheaper rivals.
How fast is Lightning Fibre?+
Max download reaches 10,000 Mbps and upload runs at 900 Mbps, which is close to symmetric and good for large uploads. That download figure places Lightning Fibre at rank 1 of 114 brands, and upload ranks 28.
OiSTER
What is the cheapest OiSTER plan and what does it cost?+
The entry price is DKK 18 a month. Basic is the pay-as-you-go option, billed on usage with no binding period, so it works for light use and for anyone who does not want to be tied in. The two Fri tale plans sit above it, one with a capped allowance and one unlimited, so the entry figure suits a phone that lives mostly on wifi.
What will I pay when an introductory price runs out?+
The Fri tale plans are published at a promotional rate first and a higher standard rate afterwards on the same plan name, so the ongoing cost is the standard rate, not the introduction. Basic sidesteps that because it is pay-as-you-go. The unlimited plan, Fri tale Fri data, is listed at DKK 49 a month on the published pricing.