Choosing between a leased line and VSAT comes down to one thing: where your business is and what you need.
A leased line gives you fast, low-latency fibre, which is ideal for cities and suburbs. Whereas the VSAT works via satellite, so it can reach remote areas where fibre never goes. Both provide internet, but they serve very different purposes.
In this article, we will compare speeds, latency, costs, and everything in between for a comparison of VSAT vs. leased lines so that you can rightly decide what is best for your business.
Key takeaways
1. A leased line provides dedicated, uncontended bandwidth, while VSAT relies on a satellite signal that is shared and subject to weather disruptions.
2. Leased lines offer latency under 10ms; VSAT latency typically ranges from 500ms to 700ms, making it unsuitable for real-time applications.
3. Leased line monthly costs range from around £185 to £650+; VSAT can cost £200 to £1,500+ per month depending on capacity and location.
4. Leased lines are backed by strict SLAs with guaranteed uptime; VSAT SLAs are less stringent, and performance can degrade in bad weather.
5. VSAT is a strong choice for remote or rural locations where fibre infrastructure does not reach.
6. Both technologies can be combined in a hybrid setup to provide primary connectivity with satellite failover.
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What Is A Leased Line?
A leased line or dedicated internet access (DIA) connection is a private, point-to-point data circuit that connects one location to another, located directly between your business premises and your internet service provider (ISP). For example, with a leased line, the bandwidth is yours and yours alone, whereas standard broadband is shared.
Essential features of a leased line are:
- Private Link: The bandwidth is not shared with other customers.
- Symmetric Speeds: The upload and download speeds are the same.
- Uncontended Service: The speed is constant irrespective of busy hours.
- Performance with SLA Backing: Up-time, fault resolution time and effective distribution are guaranteed by Service Level Agreements (SLAs).
Leased lines can offer speeds between the standard 100 MB of fibre broadband and all the way up to 100 GB, meaning they are perfect for businesses that are heavily dependent on cloud applications, VoIP, video conferencing sessions, or large file transfers. This connectivity standard is used by medium to large enterprises across the UK.
What Is A VSAT?
A Very Small Aperture Terminal (VSAT) is the typical satellite-based internet service that uses a small dish antenna (usually between 0.75m and 2.4m in size) mounted on your premises and communicates directly with a geostationary satellite about 35,786 km above the surface of the Earth, which then sends the signal back to a ground station with internet connectivity.
Key characteristics of VSAT include:
- Satellite: Terrestrial fibre or cable infrastructure is not required.
- Broad Geographical Coverage: It is designed for use in remote, rural, offshore, and maritime settings.
- Shared Capacity: Bandwidth is often shared between multiple users on a given satellite beam.
- Weather-Related: Heavy rains, blizzards, or thick cloud cover impact its signal quality.
VSAT technology is widely utilised across industries where terrestrial connectivity options are limited or non-existent, such as oil and gas platforms, maritime vessels, mining sites, military operations, and even rural enterprises. It can also be used as a backup or failover connection for businesses where redundancy is critical.
Leased Line Vs VSAT: Key Differences At A Glance
Here is a quick breakdown of the key differences between a leased line and VSAT:
| Feature | Leased Line | VSAT |
|---|---|---|
|
Type Of Connection |
Dedicated/Non-Contended |
Shared/Satellite |
|
Speed |
100 MB to 100 GB |
2 MB to 100 MB |
|
Latency |
Less than 10ms |
500ms to 700ms |
|
Reliability |
High |
Moderate |
|
Cost |
£185 to £650+ |
£200 to 1,500+ |
|
Installation Time |
45 to 90 days |
7 to 14 days |
|
Geographic Coverage |
Urban and Suburban (they need fibre infrastructure) |
Remote, rural and offshore |
|
Scalability |
High |
Limited |
|
Security |
High |
Moderate |
|
Best For |
Businesses that need speed and reliability |
Businesses in areas with no access to fibre |
Leased Line Vs VSAT: A Detailed Comparison
Now let’s take a deeper look at a detailed comparison between leased lines vs VSAT:
1. Technology
Leased lines use fibre optic cabling to provide a direct, dedicated link between your premises and the ISP. Because the data travels over terrestrial infrastructure, it does not experience delays like those you might face when sending a signal into space and back.
VSAT works very differently. Data from your premises is sent to a geostationary satellite, where it hits the ground hub station connected to the wider internet. The propagation delay, which is the round-trip aspect of this journey, is therefore what causes high latency in VSAT. The length the signal has to cover is just so much greater than that of a fibre connection on the ground.
That means leased lines offer rapid and stable low-latency performance, whereas VSAT permits variable, remote location connectivity at the cost of increased latency and risk to signal degradation.
2. Speed
Leased lines come with a vast variety of speed options, starting at 100 MB and exceeding all the way up to 100 GB for the most demanding enterprise environments.
Most importantly, they offer symmetrical speeds where download and upload speeds happen at the same scale. Unlike the past, where 1 GB broadband meant you got 900 MB in download and 700 MB in upload, now if you paid for a 500 MB leased line, you get 500 MB both ways.
On the other hand, VSAT speeds are much slower. Normal business VSAT packages in the UK can provide download speeds of between 2 MB and 100 MB, but upload speeds are generally a lot lower. Besides, the connection is in almost all cases asymmetric; that is to say, real speeds can vary depending on the number of users sharing a common satellite capacity at a given moment.
A leased line will offer a much better experience for businesses operating cloud platforms, VoIP systems, video conferencing tools, or moving large data sets. For lighter workloads or where remote connectivity is needed but speed is not paramount, VSAT is the best choice.
Want to learn more about different leased line speeds? Then see our guides:
How much does 100MB leased line cost?
100GB leased lines: costs, pricing & top providers
1 GB leased line: How much does it cost?
3. Latency
One of the most prominent factors separating VSAT vs leased line is latency, in which leased lines are clear winners.
Normally, a leased line provides latencies below 10ms, which suits any application that requires real-time data transfer, such as VoIP calls, video conferencing, financial trading platforms and remote desktops as well as cloud-based business software.
In comparison, VSAT comes with an inherent latency of 500ms to 700ms since the signal has to cover a considerable distance up and back from a geostationary satellite. One basic attribute of VSAT is that, due to high latency, it cannot be used for real-time communications unless it is further optimised.
Also, some of the newer low-earth orbit (LEO) satellite technologies, such as Starlink, are slowly lowering the latency of satellites, but conventional VSAT solutions always run at much higher latencies than a leased line.
4. Cost
When it comes to cost, it will always be a serious factor in the choice of connectivity option. So here is the cost-wise comparison between leased lines and VSAT:
| Cost Factor | Leased Line | VSAT |
|---|---|---|
|
Monthly Cost |
£185 to £270 (100 MB)
£300 to £650 (1 GB) |
£200 to £500 for a basic plan
£700 to £1,500+ for enterprise plan
|
|
Installation |
£2,000 to £30,000 |
£500 to £5000+ |
|
Contract Length |
12- to 36-month |
12- to 36-month |
|
Hardware Router |
A router and switch are needed (mostly included in cost) |
A satellite dish and modem is needed (not included in cost) |
|
SLA |
Most contracts offer great SLAs |
Less common |
At first glance, VSAT might seem well priced; however, the true cost of ownership reveals that expenses are generally higher when hardware and dish installation are included, plus you get a relatively small amount of bandwidth for your cash. Even with their high initial set-up costs, leased lines provide far better value per megabit over a longer timescale, especially if your business relies on high bandwidth.
5. Reliability And Uptime
Leased lines are one of the most consistent types of business internet connectivity available. It is a dedicated connection that operates entirely on physical infrastructure; therefore, it never becomes congested by other users.
Service Level Agreements (SLAs) typically provide a far superior 99.9% uptime or even higher and fault resolution windows that are defined timeframes, which can be anywhere from four to eight hours and sometimes even more. Should the provider fall short of these standards, service credits or financial penalties will apply.
VSAT reliability is more variable. The tech is much more mature now but remains prone to external factors. Heavy rain, dense cloud cover, and solar interference can degrade and reduce signal quality. Also, in terms of downtime, remote sites tend to take longer than ground-based infrastructure to have an engineer sent out for maintenance or repairs.
A leased line is a far more reliable choice for businesses where downtime can be expensive, particularly in financial services, healthcare, or e-commerce.
6. Installation
A clear advantage of VSAT is the speed of installation. Installation of a VSAT system usually takes 1 to 2 weeks and consists of mounting a satellite dish at your site, followed by modem installation. It does not require civil works or tedious road digging, which makes the installation process much more rapid and less intrusive.
On the other hand, leased line installation can take 45 days or even longer to set up. This includes surveying your premises, running new fibre if necessary, attaching it to the provider’s network, and setting up the end-to-end circuit. If your building is located in an area of significant civil works, there may be a significant impact on cost and timeline.
If you need connectivity quickly, especially in a remote location, VSAT can be installed in a little time compared to leased line installations.
7. Scalability
Leased lines are highly scalable. Given that they travel via a carrier-grade fibre infrastructure, scaling from 100 MB to 1 GB is simple and nearly always happens without laying any cables. This scalability is the essence of a leased line, so as your business grows, so can your connectivity.
VSAT scalability is more constrained. Satellite capacity is a non-renewable resource allocated amongst all users sharing a given beam. If the satellite beam in your area is full, there may not be a way for you to upgrade to a higher plan.
Moreover, the same hardware at your location may need replacement, as it may not work at higher speeds. As a result, VSAT is less suitable for fast-growing organisations that expect their bandwidth requirements to double or triple over a couple of years.
8. Security
Since a leased line is a private, point-to-point circuit, its data traffic is inherently separated from the rest. It’s significantly more challenging to intercept, and many providers include extra protection like private network routing. This makes it a more secure network than VSAT.
As VSAT is more susceptible to interception. The band of satellite signals radiates like a funnel, and in principle, anyone with an appropriate kit could pick it up. This is why on VSAT systems, encryption is not optional; it is a must. This is something that businesses with sensitive data, especially in a regulated industry like finance or healthcare, should consider heavily.
VSAT Vs Leased Line: Pros and Cons
Here are the key pros and cons of leased lines and VSAT:
Leased Line Pros and Cons:
| Pros | Cons |
|---|---|
|
Limited bandwidth with guaranteed speeds |
It essentially needs fibre infrastructure, which means it isn’t available in every location |
|
Ultra-low latency (<10 ms) is best for VoIP, video, and cloud apps |
The installation process is time-consuming and takes between 45 and 90 days |
|
Symmetrical upload and download speeds |
Initial installation costs are higher, which may even exceed £30,000 for complex installation |
|
It is backed by SLAs offering a guaranteed uptime |
|
|
Scalable from 100 MB to 1 GB |
|
|
It is a secure private circuit with no shared resources |
|
VSAT Pros and Cons:
| Pros | Cons |
|---|---|
|
Accessible in remote, rural, maritime, and offshore areas |
Real-time applications can’t work on VSAT due to high latency (500ms to 700ms) |
|
Fast installation, usually within a week to two |
Shared capacity translates to slower speeds, particularly during peak hours |
|
No dependency on ground fibre or cable infrastructure |
Performance may decline under extreme weather |
|
It can be used as a backup connection |
It generally offers lower maximum speeds than leased lines |
|
VSAT is ideal for temporary deployments such as construction sites or events |
Cost per megabit is pricier than leased lines |
|
|
You will need robust security encryption |
Want to find the best leased line providers in London? Then see our guide:
Best leased line solutions in London
VSAT vs Leased Line: Which One Should You Choose?
The decision of a VSAT vs leased lines comes down to your location, what you do as a business, how much money you have, and your connectivity needs.
Choose A Leased Line If:
- Your business is located in an area with fibre infrastructure.
- You use VoIP, video conferencing, or streaming cloud applications in real time.
- Your operations demand uptime and SLAs-backed guarantees.
- You require symmetrical, high-bandwidth internet access for sending large files or performing backups.
- Your team is expanding and needs bandwidth down the line.
- Your business’s key focus is on security and data privacy.
Choose VSAT If:
- Your premises are in a remote or rural location where fibre does not reach.
- You require a vessel, an oil rig, or a construction site to have internet connectivity.
- You have a primary line, but you require a backup or failover connection to provide redundancy.
- Moderate speed requirements and minimal latency-sensitive applications.
- You require immediate connectivity without the lengthy fibre installation.
Can Businesses Use Both Leased Lines And VAST?
Yes, and for a few businesses it’s the best thing to do. The hybrid connectivity setup uses a leased line as the primary link for day-to-day, high-speed, low-latency use with VSAT running in the back as a failover connection. Should the leased line fail due to a fault or undergo scheduled maintenance, then the VSAT automatically kicks in and keeps you online.
This level of resilience is essential for businesses in financial services, critical infrastructure, or remote industrial environments where any downtime simply isn’t an option. This means that you get leased line-like performance combined with all the geographical flexibility and built-in redundancy associated with a VSAT solution.
Other businesses can also deploy the VSAT as a main connection for remote sites or mobile operations while using a leased line at their company’s head office. This will allow them to establish network connectivity on all sites regardless of geography.
How To Find The Best Leased Line Provider: A Checklist
If you have decided a leased line is the best solution for your business, here is a checklist to find the best provider and deal:
1. Determine How Much Bandwidth You Need: This essentially means looking at how many users, devices, and applications will depend on the connection.
2. See Availability at Your Postcode: The availability of a leased line can also be affected by the local infrastructure and what is possible in that area.
3. Obtain Multiple Quotes: Sometimes, the best results come when you do not choose the first provider who contacts you. Providers may charge very different prices, and you will find different terms. If you want to speed up this process for free, you can compare leased line providers using the best comparison services, such as ComparedBusiness UK.
4. Scrutinise the SLA: Examine the level of guaranteed uptime commitments and, if those commitments aren’t met, what that compensation looks like.
5. Know the Installation Timelines: Ask if they can meet your deadline and when their part must be done to avoid delays.
6. Total Cost of Ownership: Consider the total contract costs, including installation, hardware, and monthly fees.
7. Look for Scalability Options: Ensure that you are able to scale your bandwidth at will without the need to change providers or rely on infrastructure.
8. Seek a Direct Account Manager: A named point of contact can be very helpful when there are problems.
Find The Best Leased Line Provider With ComparedBusiness UK
Finding the right leased line provider does not need to involve hours of research or dozens of phone calls. The whole process is made easy by ComparedBusiness UK.
All you need is two minutes to fill out your requirements, and ComparedBusiness UK will connect you with multiple of the UK’s most trusted leased line suppliers who are all fully vetted and ready to bid for your business. You receive free, no-obligation quotes tailored to your specific needs, allowing you to compare and make a confident decision.
So whether you want a connection of 100 MB for a growing SME or a dedicated line of 1 GB for an enterprise-level business, ComparedBusiness UK allows you to find the right provider at a price that suits your business.
FAQs
Yes, this can be a pretty pragmatic application of VSAT. A large number of organisations employ leased lines as their main mode of connectivity for daily operations, while having VSAT configured for failover that automatically hits when there is an outage in the leased line. This hybrid approach offers a combination of performance and resilience.
Yes, since VSAT is a wireless broadcast technology, it is more susceptible to interception and requires high-strength encryption to secure data in transit. A leased line is the more secure option for businesses that manage sensitive or regulated data.
The major drawback of VSAT is it has more latency than other options. Delays of 500ms to 700ms are typical since the signal needs to travel all the way out there to a geostationary satellite. As a result, VSAT alone cannot be used for data transmission involving a real-time nature, such as VoIP calls, video conferencing, or cloud-based systems.
