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. Maxim Integrated Products

Maxim Integrated Products makes integrated analog and mixed-signal semiconductors. The company supplied a broad range of linear and mixed signal integrated products, commonly referred to as analog circuits. In May 2010, the company opened its offices in Clonskeagh, D...

7. 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...

8. 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.

9. 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...

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. Vodafone

Vodafone is one of the world’s largest telecommunications companies and provides a range of services including voice, messaging, data and fixed communications. Vodafone operates mobile and fixed networks in 21 countries, and partners with mobile networks in 47 more. As...

13. Orange Business Services

Equant Network Services International Limited is a trading company of Orange Business Services (OBS) in Ireland. It provides data processing and clearing services to the OBS group which is a global IT and communications services provider. It also provides telec...

14. Premiere Conferencing

PGi provides teleconferencing and web-related communications solutions using video, web and audio conferencing enhanced with social networking and media sharing. Established in 1991, PGi now has a presence in 25 countries worldwide. The group's headquarters are i...

15. RTE

RTE is the State owned Public Service Broadcaster. It is a non-profit making organisation which receives some of its income from Television Licence fees. RTE provides free-to-air television, radio and online services. RTE television operates two free-to-air televisio...

16. 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...

17. 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...

18. 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,...

19. 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...

20. Fónua

Fónua is involved in the distribution and repair of mobile phones and mobile phone accessories. It has an annual turnover exceeding €240 million and its customers include blue chip multi-national telecommunication companies such as Vodafone, O2 and Meteor as well as...