SIRO. 100% Fibre Network for Business.

100% Symmetric Fibre with Enterprise-grade SLA, built on the ESB Network

What We Offer

At SIRO, we understand medium to large companies require more than fast connectivity. SIRO Enterprise-grade 100% fibre network offers a future proofed solution that can evolve as your company grows.

  • 100% fibre connection: widely recognised as the only future-proofed solution, SIRO fibre connectivity supports 100Mbps to 1Gbps right now, and can be upgraded to 10Gbps and beyond as technology evolves.
  • Symmetric service: SIRO Enterprise connectivity offers equal upload and download speeds of up to 1Gbps, suitable for large enterprises where data demands are equally high both upstream and downstream.
  • ESB network: SIRO is a brand new network built on the ESB infrastructure, offering diversity and superior reliability.

SIRO is available at nine leading Enterprise retail partners such as Airwire, Blacknight Internet Solutions, Carnsore Broadband, Digiweb, Viatel, Vodafone and Wesnet. Search your Eircode to find out which retailer(s) are available at your business address.


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Why Choose SIRO 100% Fibre for Your Business?

  • Enterprise SLA

    SIRO provides Enterprise grade SLA services, including a 24/7 option to give your business peace of mind.

  • SIRO 100% Fibre Broadband


    Built on the ESB network, SIRO 100% fibre optic cables are less susceptible to electronic interference and are resistant to high temperature, humidity and fire.

  • SIRO ESB Broadband

    Diversity on the ESB Network

    Our network follows the electrical network instead of the usual telecoms routes, providing a diverse link without compromising on latency or bandwidth.

  • SIRO fibre broadband with Speeds of 1 Gigabit per second

    Competitive pricing

    Our brand new GPON network allows businesses to access enterprise-grade fibre services at competitive prices.

  • Guaranteed Irish Product

    SIRO is 100% Irish, supporting local jobs and communities across Ireland with a strong commitment to empowering Irish businesses to prosper and grow.

Benefits to Your Business

SIRO resilient 100% fibre connectivity enables you to address your operational priorities and manage the digital transformation accelerated due to COVID-19, such as managing a remote workforce, ensuring optimal network performance or enhancing productivity.

  • Remote working: SIRO helps maximise the efficiency and effectiveness of your remote workforce by enabling buffer-free videoconferencing, ultrafast file upload and download, and seamless cloud accessibility.
  • Faster cloud apps: Having a strong symmetric fibre connection ensures your employees can collaborate in real time on cloud services such as Zoom, Microsoft Teams, Google Drive, Office 365 and Dropbox without the dreaded ‘Connection timed out’ message.
  • Diversity, reliability and Enterprise SLA: making SIRO ideal for business-critical operations such as transaction processing, inventory control and finance operations.

SIRO Business Retail Partners

SIRO, Blacknight & Cartoon Saloon: Making Magic Happen

Working with its broadband partner Blacknight, the Oscar-nominated animation studio Cartoon Saloon was able to connect to SIRO Gigabit 100% fibre broadband network, enabling them to facilitate remote working during the pandemic and put the finishing touches to their latest animation Wolfwalkers and other shows.


Find Out More

Latest SIRO for Business News

Common questions about SIRO

What is SIRO?

SIRO is a joint venture company between the ESB and Vodafone. We are building a 100% fibre optic broadband network using the ESB’s infrastructure.  SIRO’s key differentiator is that it is a custom-built 100% fibre-optics network delivering speeds of 1 Gigabit per second, with no copper connection at any point in the network, making it faster and more reliable than any other traditional broadband infrastructure in Ireland. 

Why did ESB & Vodafone get involved?

SIRO was launched in 2015 with our shareholders ESB and Vodafone committing €450m to connect the first 50 towns.  The two shareholders have complementary skill sets. ESB was a pioneer in electrifying Ireland and have unparalleled knowledge of large-scale engineering projects. Vodafone is Ireland’s leading mobile telecoms operator, with over a million customers and world-leading expertise in the transmission of data. These two companies enable SIRO to build a regional 100% fibre-to-the-building network, the first of its kind in Ireland.  

Why choose SIRO?


SIRO’s 100% fibre-to-the-premise network is delivered using ESB existing infrastructure, with no copper connection at any point in the networkFibre-optic cables are not affected by environmental factors than can weaken signals over copper cables. For example, the signal on a copper wire drops massively over just two kilometres, whereas fibre-optic cable over the same distance is extremely reliable. Unlike copper, fibre is highly resistant to heat, humidity and extreme weather conditions.  



SIRO’s 100% fibre broadband offers speeds of 1 Gigabit per second, while a copper-based network generally delivers speeds of up to 100 Megabits per second. 25GB HD movie would take 3 minutes to download on a FTTH 1Gbps connection, but more than 30 minutes on a FTTC 100Mbps connection (source: FTTH Council Europe) 


Multiple Devices 

Our homes and offices are full of devices – multiple laptops, tablets, consoles and mobiles are usually connected to the internet at once. With SIRO 100% fibre broadband, you can connect as many devices to your broadband as you like and not slow down your connection. 


Future Proof 

Unlike copper network, fibre-optic cables are extremely resilient to heat, humidity and extreme weather conditions, making this the last broadband connection you’ll ever need. Our Gigabit network is capable of supporting much faster speeds in the future, enabling homes and businesses to cater to evolving technologies and meet future data needs.  


Why is SIRO different?

SIRO’s key innovation is that it is a 100% fibre-optic internet connection all the way to the building (fibre-to-the-building), making it a vast improvement on any other broadband infrastructure currently available in Ireland, with no copper connection at any point in the network. SIRO is Fibre-to-the-building which means you’ll have incredible speed and reliability instantly.

Will everybody get speeds of 1Gb?

SIRO offers speeds of 1 Gigabit (1000Mbp) per second to broadband operators, but they may choose to offer a range of different products & speeds to end consumers at different price points. Various factors which SIRO has no control over may impact the speed of the wifi in your premise. For example, the age of devices and router used and their ability to deal with 1GB speeds may result in a slower experience.

How do I check if SIRO is available in my home/business?

To check availability in your home or business, please visit our address checker

How much does SIRO cost?

As an open access wholesaler, SIRO develops the network and then makes it available for local broadband providers to bring to the public. Our retail providers offer a range of different products and speeds to end consumers at different price points.

What is the timeframe for delivery?

Due to commercial sensitives, we will announce specific timelines for individual towns closer to the date.

I’m experiencing service issues, who do I contact?

SIRO is a wholesale operator and we are responsible for building the SIRO network. If you are experiencing any service issues, we must advise you to contact your chosen retail provider.

What were the criteria for town selection?

SIRO is a commercial venture and will be delivered to 50 towns in phase one, which are topographically and geographically accessible and which are not served by high-speed broadband.