Top 100 IT Services Companies in the United Kingdom

Questers is a software development and IT consulting firm that is based in Sofia, Bulgaria with a second location in London. They have been in business since 2007 and have 45 employees. They focus on serving clients in the IT, advertising, and business services industries. Their expertise lies in the IT staff augmentation, IT managed services, and IT strategy consulting fields.

Guidance Software is a software development firm that has been in operation since 1997. They are headquartered in Pasadena, Calif. and they have additional offices in Slough, U.K., Courbevoie, France, Waukesha, Wis., Rosemont, Ill., Dulles, Va., and New York. They have over 800 employees and they specialize in cybersecurity, IT strategy consulting, and IT staff augmentation. Their clients generally work in consumer services, government, or healthcare.

Rapid7 is a cybersecurity company launched in 2000. Their large team is located in Boston, Massachusetts; Manhattan Beach, California; Austin, Texas and Cambridge, Massachusetts. The company offers cybersecurity, IT managed services, and IT strategy consulting.

Cybereason is a cybersecurity company launched in 2012. Their midsize team is in Boston, Massachusetts; London, United Kingdom and Tel-Aviv, Israel. The agency specializes in cybersecurity, BI & big data consulting & SI, and IT strategy consulting.

Digital Guardian, an IT managed services company, was launched in 2003. Based in Waltham, Massachusetts; Reston, Virginia; Santa Clara, California and Lehi, Utah, their midsize team focuses on IT managed services, cybersecurity, and IT strategy consulting.

Veracode is a cybersecurity company based in Burlington, Massachusetts; London, United Kingdom and Boston, . The firm provides cybersecurity, application testing, and IT strategy consulting and has a midsize team.The firm was founded in 2006.

Netbooster is a CRM consulting and SI company launched in 1998. Their midsize team is headquartered in Westminster, United Kingdom. Their services include CRM consulting and SI, digital strategy, IT strategy consulting, pay per click, and more.

Merkle is a marketing agency headquartered in Columbia, Md., and with over 20 additional offices located throughout the United States, Europe, and Asia. Founded in 1971, Merkle's nearly 4,000 employees specialize in CRM consulting and SI, digital strategy, and social media marketing.

Masergy was founded in 2000 and currently operates the world’s largest independent Software Defined Platform. They offer enterprise-level clients custom software development and IT managed services. Using cutting-edge technologies, the firm specializes in hybrid networking, managed security and cloud communication solutions. Headquartered in Plano, Texas, Masergy has about 520 employees across its multiple locations in New York, Los Angeles, San Francisco, London, the Philippines, and the Netherlands. 

Provista UK is an IT managed services and other IT consulting and SI company. The small Hamilton, United Kingdom-based agency was founded in 2006. Their team offers IT managed services and other IT consulting and SI.

Voyager Networks is a small IT managed services company. Founded in 1993, the team focuses on IT managed services, enterprise app modernization, cybersecurity, and other IT consulting and SI. The company is based in Aldermaston, United Kingdom.

Lynx Networks is an IT managed services company. They are based in Bletchley, United Kingdom and Waterlooville, United Kingdom and have a small team. The firm specializes in IT managed services.

Du Pré is an IT managed services company founded in 1979. Their small team is headquartered in Aldermaston, United Kingdom. Their services include IT managed services.

Absolute Networks is a small IT managed services company. Based in Derby, United Kingdom and Mumbai, India, the firm was established in 2003. Their services include IT managed services, cloud consulting & SI, and cybersecurity.

EC-MSP, an IT managed services company, is headquartered in London , United Kingdom. They provide IT managed services, other IT consulting and SI, and cloud consulting & SI and were established in 2002.

Lucidica is an IT managed services company. Launched in 1999, the team focuses on IT managed services, other IT consulting and SI, cloud consulting & SI, and CRM consulting and SI. Their small company is located in London, United Kingdom and London, United Kingdom.

Netstar, an IT managed services company, is based in London, United Kingdom. The midsize team provides IT managed services and other IT consulting and SI. The agency was established in 2002.

Established in 1992, Probrand is an IT managed services company. Their midsize team is in Birmingham, United Kingdom; Birmingham, United Kingdom and Stretford, United Kingdom. Their services include IT managed services.

Plan-Net is an IT managed services company founded in 1990. They are in London, United Kingdom and have a midsize team. Their services include IT managed services and other IT consulting and SI.

IT managed services company IT Lab was established in 1998. The midsize team specializes in IT managed services, other IT consulting and SI, cloud consulting & SI, unified communications consulting & SI, and more. The agency is headquartered in London, United Kingdom; Woking, United Kingdom; Pendlebury, United Kingdom and Cape Town, South Africa.

Circle IT, an IT managed services company, was established in 2002. The midsize team provides IT managed services, other IT consulting and SI, and cybersecurity. The company is based in Cardiff, United Kingdom.

RockIT is a midsize IT managed services company. Launched in 2008, the agency is located in Pencoed, United Kingdom. Their services include IT managed services.

Based in Wymbush, United Kingdom and London, United Kingdom, Mirus IT Solutions is an IT managed services company. The midsize team offers IT managed services, other IT consulting and SI, cloud consulting & SI, CRM consulting and SI, and more. The firm was established in 2002.

ACUTEC, an IT managed services company, was founded in 1995. They are headquartered in Coleshill, United Kingdom and have a small team. ACUTEC specializes in IT managed services, custom software development, cloud consulting & SI, and cybersecurity.

Herjavec Group is an IT managed services company in Toronto, Canada; West Hollywood, California and Reading , United Kingdom. Founded in 2003, the midsize team specializes in IT managed services, cybersecurity, and IT strategy consulting.

Iomart Group, a cloud consulting & SI company, was established in 1998. The firm focuses on cloud consulting & SI, IT managed services, and IT strategy consulting and has a midsize team.

IT managed services company RoundWorks IT is located in Nottingham, United Kingdom. Founded in 2016, the small team specializes in IT managed services, IT strategy consulting, and cloud consulting & SI.

Coretx is a midsize Croydon, United Kingdom-based IT managed services company. They offer IT managed services and cloud consulting & SI and were founded in 1992.

Founded in 1990, Our IT Department is an IT managed services company. The company specializes in IT managed services, cloud consulting & SI, and cybersecurity and has a small team.

Ziptech Services, an IT managed services company, was launched in 2003. They are in London, United Kingdom and have a small team. Ziptech Services offers IT managed services, IT strategy consulting, and cloud consulting & SI.