Business telecoms, done properly · broadband, phone systems, mobile & Wi-Fi

Comparison

Leased line or full fibre?

Both are fibre. They are not the same product, and the right answer depends far more on what downtime costs you than on the speed on the tin.

ContentionTHE REAL DIFFERENCE
UploadsWHERE FULL FIBRE LOSES
SLAWHAT YOU ACTUALLY BUY
Your addressDECIDES EVERYTHING

Side by side

The same fibre, sold two very different ways.

Both deliver fibre to your building. What differs is whether anyone else is sharing it, and what happens when something breaks.

Shared

Full fibre (FTTP)

  • Far cheaper for the headline speed
  • Fast to install where already available
  • Plenty fast enough for most offices
  • No long build or civils in most cases
  • Contended, so performance varies with demand
  • Upload much slower than download
  • Speeds quoted as "up to"
  • Best-efforts fix times, no compensation
Dedicated

Leased line

  • Uncontended, so speed does not move
  • Upload matches download
  • Guaranteed bandwidth, not "up to"
  • SLA with fix times and compensation
  • Proactively monitored
  • Several times the monthly cost
  • Longer install, often months
  • May attract construction charges

The honest test

Ask what an outage costs, not what speed you want.

Speed is the wrong way to choose between these. Most businesses do not need a gigabit. What separates them is tolerance for downtime.

  • If a day offline means lost orders, stalled payments or idle staff, the SLA is the product and a leased line earns its cost
  • If a day offline is annoying but survivable, full fibre with 4G or 5G failover usually delivers more for the money
  • If you upload a lot, video, backups, large files, the symmetry matters more than the headline number
  • If you host anything on site, or run a lot of remote users, upload is likely already your bottleneck
Choose full fibre whenCost matters, the office is normal-sized, and an outage is an inconvenience rather than a crisis.
Choose a leased line whenRevenue stops when the line does, uploads matter, or you need someone contractually obliged to fix it.
Consider bothA leased line with broadband failover is common for businesses that genuinely cannot be down.

Common questions

Answered.

Is a leased line faster than full fibre?

Not necessarily. Full fibre often has a higher headline download speed for far less money. What a leased line gives you is uncontended, guaranteed and symmetrical bandwidth with a service level agreement behind it. You are buying consistency and upload speed, not a bigger number.

What does uncontended actually mean?

That the capacity is reserved for you alone rather than shared with other users in the area. On a contended service, such as standard broadband or full fibre, what you get can vary with local demand, which is why speeds are advertised as "up to".

Why does upload speed matter?

Because most business activity now sends data as well as receiving it: video calls, cloud backups, large file transfers, remote access to on-site systems. Full fibre typically gives you far less upload than download, and that is where people notice the limit long before download becomes a problem.

How much more does a leased line cost?

Several times the monthly cost of full fibre, and the exact figure depends heavily on your address. Distance from the network and whether construction work is needed can change it enormously between two premises on the same street, which is why we quote per site rather than publish a price.

Can I have full fibre with a backup instead?

Yes, and for many businesses it is the better value answer. Full fibre with automatic 4G or 5G failover covers the outage scenario at a fraction of the cost of a leased line, though without the guaranteed speeds or the contractual fix times.

Not sure which you need?

Send us a postcode and we will tell you what is genuinely available at your premises, and which of these makes sense for how you actually work.