1. Apple Ireland

Apple designs and creates iPods and iTunes, Mac laptops and desktop computers, the OS X operating system, and the iPhone. The company first established operations in Ireland in 1980. The company is based in Cork and currently employs about 6,000 people . CEO of Apple ...

2. Google

Google Ireland is the Europe, Middle East and Africa (EMEA) headquarters for Google and provides technical, sales and operations support to customers in over 50 countries.

3. Meta Ireland

Founded in 2004, Meta (Facebook) is a social utility that connects people with friends and others who work, study and live around them.

4. Eircom

Eir (previously known as eircom) is the principal provider of fixed-line telecommunications services in Ireland with approximately 2.6 million fixed-line telephone access channels in service. The company's mobile division includes Meteor and emobile. In March 2016, Eir...

5. Linkedin

Founded in 2003, LinkedIn is the business-oriented social networking site, which connects the world’s professionals and strengthens their network. LinkedIn has had an office in Dublin for five years. Linked in has more than 400 million members in over 200 countries and...

6. Commscope

Commscope EMea Ltd is a subsidiary of the global cable provider Commscope. The company makes physical cables connecting telephones, work stations, local area networks (lan's) and other communication devices. in January 2011 Commscope was purchased by the Carlylse Grou...

7. Mediahuis Ireland

Mediahuis Ireland, formerly known as Independent News & Media (INM), is a newspaper and media group across the island of Ireland. INM has market-leading newspaper positions in Ireland and Northern Ireland, with a strong and growing digital presence. INM is the larges...

8. BT

BT is Ireland’s second largest fixed line communications and IT services company whose business in the State consists of two main parts, wholesaling services to other communications companies and retailing to major businesses and government. It wholesales services t...

9. Avaya International

Avaya provides business communications systems. The company provides unified communications, contact centres, data solutions and related services both directly and through its channel partners to businesses and organisations around the world.

10. J2 Global

J2 Global offers cloud-based unified-messaging and communications services to individuals and companies throughout the world. Such services include voicemail solutions, web-initiated conference calling, storage messaging services, online backup and virtual office sol...

11. Afilias

Afilias provides registration services for internet domains. The company has its headquarters in Dublin and has offices in London and Vancouver. The company is the registry operator for the .info domains and also provides services to operators of generic and country...

12. Three Ireland

Three is one of Ireland’s leading mobile operators with 36.8 per cent market share and 2.6 million customers (as of March 2021). Three’s network has 99 per cent 4G coverage and is built for data; carrying over 60 per cent of all mobile data on the network. Three lau...

13. KN Circet

KN Circet is an infrastructure and utilities services provider operating in Ireland, UK and internationally. Its areas of expertise span civil engineering, telecoms, construction, wireless technologies, rail infrastructure and home energy services. Its Irish office is l...

14. M/A-COM Technology Solutions

M/A-COM Technology Solutions Holdings, Inc. is a supplier of high performance analog RF, microwave, millimeterwave and photonic semiconductor products that enable next-generation Internet and modern battlefield applications. M/A-COM Tech is headquartered in Lowell, Ma...

15. PFH

PFH Technology Group is a leading provider of ICT solutions to corporate, government, health and higher education organisations. Founded in 1985, the company employs over 237 employees with offices in Dublin, Cork, Galway and Belfast. Founded in 1985, the PFH organi...

16. Acra Control

Acra Control is a supplier of airborne data acquisition networks and recording systems, and real-time data processing ground stations to both commercial and defence aerospace markets. Its customers include all of the major aerospace prime contractors and test agencies...

17. The Irish Times

The Irish Times is Ireland's leading quality news organisation, delivering news, opinion and analysis to 793,000 print and online readers each week. News reporting from throughout Ireland is accompanied by reports from a comprehensive network of foreign correspondents,...

18. Verizon Ireland

Verizon is a global group specialising in communications, IT solutions, information and entertainment services. The group is headquartered in Basking Ridge, New Jersey, and employs more than 100,000 people. Its Irish operation provides telecommunication services and...

19. Concentrix

Concentrix (the Irish operations of which were previously known as Stream Ireland) was acquired by Synnex and merged with its Concentrix subsidiary in 2018. Concentrix offers sales, customer care and technical support to its customers. It has a global network of appr...

20. Siemens

Siemens Ltd is the Irish arm of the German electronics and electrical engineering company. Siemens operates in the industry, energy and healthcare sectors and provides infrastructure solutions for cities The company has been involved in major projects in Ireland fro...