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Selectra
Budget Openreach ISP

Onestream Broadband UK

A small independent UK broadband provider based in Fareham, Hampshire, reselling the Openreach FTTC and Full Fibre network at budget headline prices. This page covers Onestream’s current deals, the small-print warnings you should know before signing, contact lines and what real customers say in 2026.

See Onestream deals Contact Onestream

At a glance

Founded 2018, Fareham HQ Openreach FTTC + FTTP network Budget headline prices Mixed Trustpilot reputation

Founded

2018

Independent UK ISP, Hampshire

Network

Openreach

FTTC + Full Fibre (FTTP)

Top FTTP speed

500 Mbps

Full Fibre 500 download average

Trustpilot

~2.0 / 5

Mixed reputation, May 2026

About

Who is Onestream Broadband?

Onestream Broadband is a small, independent UK internet service provider launched in 2018 and headquartered in Fareham, Hampshire. It positions itself as the cheapest mainstream broadband option in the UK, regularly topping the price tables on MoneySavingExpert, Uswitch and MoneySuperMarket.

Onestream does not own a network of its own. It buys wholesale access to the Openreach fibre network, the same physical line that BT, Sky, Plusnet, TalkTalk and dozens of smaller ISPs all sell over. That means the raw broadband performance is, technically, identical to any other Openreach reseller. What differs between providers on the same line is price, customer service, router quality and the small-print add-ons that appear on the bill after sign-up.

Onestream is regulated by Ofcom, and complaint escalation falls under Ombudsman Services: Communications. It is too small to feature in Ofcom’s quarterly complaints league table, which only ranks ISPs above 150,000 customers.

Current deals

Onestream Broadband deals available now

Headline prices verified on . Onestream changes promotional offers regularly. Critically, the headline price on the deal card is rarely your final monthly bill, always read the add-ons page before paying.

Cheapest headline price

Entry fibre (FTTC)

Onestream Fibre 36

Download

36 Mbps

Average download

Upload

9 Mbps

Average

£20 /month

12 to 18 months contract . £0 upfront

  • FTTC over copper line
  • Unlimited usage
  • Standard router included

Best for

A 1 to 2-person household with light browsing and SD streaming

See on Onestream

Mid-tier fibre (FTTC)

Onestream Fibre 67

Download

67 Mbps

Average download

Upload

18 Mbps

Average

£23 /month

12 to 18 months contract . £0 upfront

  • FTTC over copper line
  • Unlimited usage
  • Standard router included

Best for

A 3 to 4-person household streaming HD and working from home

See on Onestream
Where FTTP is live

Full Fibre entry

Onestream Full Fibre 150

Download

150 Mbps

Average download

Upload

30 Mbps

Average

£25 /month

12 to 18 months contract . £0 upfront

  • FTTP over fibre line
  • Unlimited usage
  • Standard router included

Best for

A family streaming 4K and video-calling all day

See on Onestream

Full Fibre top

Onestream Full Fibre 500

Download

500 Mbps

Average download

Upload

73 Mbps

Average

£28 /month

12 to 18 months contract . £0 upfront

  • FTTP over fibre line
  • Unlimited usage
  • Standard router included

Best for

Heavy users, large households, anyone moving big files

See on Onestream

Read the order page carefully. Onestream’s headline price often does not include optional add-ons like TechHelp insurance, which can be pre-ticked at checkout. Untick anything you do not actively want and screenshot the final order page before paying.

Selectra is independent. Onestream does not pay us to feature these tariffs. We list its public deals so you can compare them honestly against the rest of the UK broadband market.

Explore

What Onestream Broadband actually sells

Onestream is a home-broadband-only ISP. There is no TV bundle, no mobile arm, no business product line. Below is each section of the Onestream universe with the deep-dive page.

Broadband

Fibre to the cabinet (FTTC) and Full Fibre (FTTP) over the Openreach network. Headline prices are usually among the cheapest you will see in any price-comparison table.

Open page

Contact number

Full directory of Onestream phone lines: customer service, sales, complaints, technical support, plus what to read before you sign so you know what you are paying.

Open page

Customer reviews

Honest, platform-by-platform breakdown of what Onestream customers actually say in 2026. Trustpilot, Ofcom complaints data and the Selectra online-presence audit.

Open page

Reviews snapshot

What customers actually say about Onestream

Scores collected from each platform on . We do not pick the flattering one and ignore the rest, we show all of them and explain what they actually mean.

Trustpilot, onestream.co.uk

2.0 / 5

~5,000 reviews

Mostly negative

A low aggregate score by UK ISP standards. The dominant complaint themes are unexpected add-on charges (TechHelp insurance billed monthly after the first free period), price rises mid-contract and friction when trying to cancel.

Ofcom complaints data, 2025

Not listed small-ISP threshold

Below 150k-customer cut-off

Mixed

Onestream is too small to appear in the official Ofcom league table, which only ranks ISPs above 150,000 customers. That cuts both ways, no industry comparison number, but no published black mark either.

Price-comparison sites

Top of list cheapest deals

MSE, Uswitch, MSM

Positive overall

Onestream regularly appears at the very top of cheap-broadband round-ups on MoneySavingExpert, Uswitch and MoneySuperMarket. The headline price is genuinely cheap, the catch is the small print, not the table figure.

MoneySavingExpert forum

Cautious forum sentiment

Multiple warning threads

Mostly negative

MSE forum threads about Onestream are dominated by warnings to read the contract line-by-line, screenshot every page during sign-up and watch the first three bills closely for add-ons that the customer does not remember opting in to.

Read the full Onestream review

Selectra expert verdict

Independent read, no commission shaping

Onestream Broadband is, on paper, one of the cheapest ways to buy a UK broadband line. The headline tier prices are routinely £5 to £10 a month below BT, Sky and Vodafone for the same physical Openreach connection. If your priority is the lowest possible monthly direct debit and you are confident reading a contract carefully, Onestream can deliver real savings.

The honest weakness is the gap between headline and reality. Onestream’s Trustpilot score sits around 2.0 / 5, with a strong recurring complaint pattern: add-on charges that customers do not remember opting in to (TechHelp insurance is the most-cited culprit), price rises mid-contract that feel larger than expected, and cancellation friction when leaving. The line itself is identical to any other Openreach reseller, the problems live in billing and customer service.

Selectra’s practical advice: only sign up if you read every checkbox on the order page, screenshot the final summary, and check your first two bills line-by-line. If you would rather pay slightly more and not worry, Plusnet is the safer Openreach budget pick, and BT is the premium choice on the same line.

Verdict last reviewed 19 May 2026.

FAQ

Onestream Broadband, your questions answered

Is Onestream Broadband actually any good?

It depends entirely on whether you read the contract. The headline price is among the cheapest in the UK, often £5 to £10 a month below BT or Sky for the same Openreach line. The network performance itself is fine because it is the same Openreach FTTC or FTTP wire. The persistent problem is the add-ons, in particular a service called TechHelp that is often pre-ticked at checkout and starts billing after a free trial. If you uncheck the add-ons and screenshot the order page, you can get a genuinely cheap broadband line. If you click through quickly, your real monthly bill can be 30 to 50% higher than the advertised price.

How much is Onestream broadband per month?

As of May 2026, headline prices are around £20 a month for Fibre 36 (FTTC), £23 for Fibre 67, £25 for Full Fibre 150 and £28 for Full Fibre 500. These are the cheapest tier prices in mainstream UK broadband. Always check the live Onestream site and uncheck every pre-selected add-on before paying.

What network does Onestream use?

Onestream resells the Openreach network, the same physical fibre that BT, Sky, Plusnet, TalkTalk, Vodafone and dozens of smaller ISPs all use. Onestream sells FTTC (fibre to the cabinet, copper to your home) and Full Fibre FTTP (fibre to the property) where the latter is live. The line quality is therefore identical to any other Openreach-based provider, the difference between ISPs is price, customer service and router quality, not raw network.

What is TechHelp and do I have to take it?

TechHelp is an optional technical-support insurance add-on sold alongside Onestream broadband. It is the source of most complaints about hidden costs because it is sometimes pre-selected at checkout with a free trial that converts to a paid monthly subscription unless cancelled. You do not have to take it. Untick it during sign-up. If you have already been billed for it, you can cancel it by phoning Onestream customer service. Keep written proof of the cancellation.

How do I cancel Onestream broadband?

Cancellation usually requires a phone call to Onestream customer service rather than a clean online click. You can leave penalty-free in the last 30 days of your minimum term, or if Onestream raises the price by more than the amount written into the contract. Outside those windows, expect to pay the remaining monthly fees on your contract. Always send a follow-up email confirming the cancellation so you have a written record if billing continues.

Will Onestream raise my price during the contract?

Yes. Like every major UK ISP, Onestream applies an annual price rise during the contract. Since Ofcom outlawed CPI-linked rises in January 2025, the increase must be a fixed pound-and-pence figure written into the contract on day one. Read the page that says "your price each year of the contract" carefully before signing, the second-year price is what you will actually pay for most of your time on the deal.