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 over 5,000 people as a result of a...

2. Facebook

Founded in 2004, Facebook is a social utility that connects people with friends and others who work, study and live around them. People use Facebook to stay connected with friends and family, to discover what’s going on in the world, and to share and express what matter...

3. Microsoft

Microsoft Ireland Operations Ltd is a subsidiary of the software giant Microsoft which sells, distributes and markets software globally from Dublin. Microsoft, the world’s biggest software company, established an Irish manufacturing facility in 1985 and now employs ...

4. Dell Ireland

Since 1984, Dell has been an end-to-end computing solutions company. With more than 100,000 team members across the globe, Dell serves customers ranging from the world's largest businesses and public-sector organisations, to small and medium businesses, and individual c...

5. Oracle

The principal activity of Oracle EMEA Ltd is the manufacture and sale of computer software in the European market, together with the provision of associated translation, finance and marketing services. Oracle Corporation, incorporated in 2005, is an enterprise softw...

6. Sandisk

Sandisk provides various flash memory storage, the data storage technology included in memory sticks, smartphones, tablets and mp3 players. The company claims that approximately 250,000 retail outlets offer SanDisk products to consumers globally and ships more than two ...

7. Kingston

Kingston Technology International Ltd is a manufacturer of memory products such as USB drives. It markets over 2000 memory products and supports more than 6000 systems. It is a privately owned company with headquarters based in Fountain Valley, California and with s...

8. VMware

VMware International sells, markets and provides support for VMware software products sold outside the US. Its US parent is software company VMware which provides virtualisation solutions to separate the operating system and application software from the underlying hard...

9. Microchip Technology

Microchip Technology Ireland Limited operates as a subsidiary of Microchip Technology Inc. Microchip Technology Inc. (NASDAQ: MCHP) is a leading provider of microcontroller, analog and Flash-IP solutions. The company is headquartered in Chandler, Arizona.

10. Intel Ireland

Intel Ireland's Leixlip campus began operations in 1989. Since then, the multinational microchip manufacturer has invested over €6 billion in developing this base. It employs over 5,000 people at its Irish subsidiary.

11. 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...

12. 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...

13. 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...

14. Sandvik

Sandvik Mining & Construction Logistics is a high-technology, Swedish engineering group. It has representation in more than 130 countries. The company does business in three main areas - it manufactures tools for metal cutting in cemented carbide and high-speed stee...

15. HP Ireland

Hewlett Packard in Ireland runs nine different businesses with over 4,000 employees in the areas of manufacturing, research and development, customer software support, marketing, and sales and services. The main site for HP in Ireland is located in Leixlip, Co Kildare, ...

16. NCR

NCR Corporation is a global technology company with self-service solutions for ATM machines and software, POS and Retail systems and airline check-in systems. NCR Global Solutions is wholly owned by the NCR Corporation and supports the management, development, and g...

17. Salesforce

Salesforce.com provides computer Software as a Service (Saas) and other consulting and support services to assist organisations in the easy distribution of information to customers. Sfdc Ireland Ltd is the representative of salesforce.com within the territory of Ireland...

18. Netgear International

Netgear designs networking, storage and security technology solutions for small- to medium-sized businesses and home users. The company's headquarters are in San Jose, California, with additional offices in 25 countries. Its international headquarters are based in Cork.

19. SAP Business Objects

The business software supplier has offices in over 120 countries, over 55,000 employees, and revenues in excess of €12billion. It employs over 1,200 people across three sites in Dublin and Galway. The Dublin organisation focuses on the provision of Global Support, R...

20. Twitter

Twitter is a real-time information network that connects users to the latest stories, ideas, opinions and news via tweets. Twitter’s EMEA headquarters are located in Dublin, where employees of the microblogging site work across areas including sales, partnerships, desi...