Top 100 IT Services Companies in London

Cloudini is a cloud consulting & SI company. Their small team is in London, United Kingdom. The agency focuses on cloud consulting & SI, IT staff augmentation, custom software development, web development, and more.

DynaRisk, a cybersecurity company, is in London, United Kingdom. The small firm was launched in 2016. Their team focuses on cybersecurity.

Founded in 2020, CovertSwarm is a cybersecurity company. The company focuses on cybersecurity and has a small team.

Lonlogic is a web design and development company founded in 2013 and located in London. With a team of fewer than 10 employees, they offer web design, web development, SEO, digital strategy, and social media marketing services.

Blockchain company BlackStack Labs is located in London, United Kingdom. The small agency was founded in 2024. Their services include blockchain, web design, IT strategy consulting, custom software development, and more.

Immerse is an AR/VR development and other IT consulting and SI company. They provide AR/VR development and other IT consulting and SI and were founded in 2005. The agency is located in London, United Kingdom.

Cyber Legion is a cybersecurity company located in London, United Kingdom. They offer cybersecurity, application testing, and other IT consulting and SI and were founded in 2021.

Oscore Ltd is a IT staff augmentation company launched in 2016. Their small team is in London, United Kingdom and provides IT staff augmentation, mobile app development, other application development, Artificial Intelligence, and more.

Webzstore Solutions is a development and digital marketing firm located in Kolkata, India. Their services include SEO, web design, web development, and e-commerce development. Founded in 2010, They work primarily with small businesses in dental and e-commerce industries.

Suntel Analytics, LLC is a West Palm Beach, Florida-based AI development company. Launched in 2022, the small team focuses on Artificial Intelligence, business consulting, corporate training, ai consulting, and more.

Artificial intelligence development company and business intelligence company GYANA was launched in 2015. Their small team is located in London, United Kingdom. Their services include Artificial Intelligence and BI & big data consulting & SI.

TrustVare Software is a big data analytics company headquartered in Redhill, United Kingdom. The midsize team offers BI & big data consulting & SI, cloud consulting & SI, and custom software development. The firm was launched in 2020.

IT strategy consulting company Beryl Technologies Ltd is headquartered in London, United Kingdom and Multan, Pakistan. The firm focuses on IT strategy consulting, cybersecurity, and IT managed services and is large.The firm was launched in 2023.

Navisite is a large Andover, Massachusetts-based cloud consulting & SI company. Founded in 1997, the team focuses on cloud consulting & SI, IT managed services, IT strategy consulting, and ERP consulting and SI.

Prolifics is a digital consulting and solutions company based in Calabasas, Calif., with offices in Hyderabad, India; Reading, UK; Hamburg, Germany; New York; and London. The company, founded in 1978, has more than a thousand employees and provides ECM consulting and SI; productivity, collaboration, and UC consulting and SI; and other IT consulting and SI services to various companies. 

Based in Nürnberg, Germany; São Paulo, Brazil; Palo Alto, California and London, United Kingdom, EXASOL AG is a business intelligence company. The company specializes in BI & big data consulting & SI and is midsize.The company was founded in 2000.

AKQA is a multidisciplinary development company with headquarters in San Francisco and offices around the world. The company was founded in 1994 and has grown to a team of over 2,000 that specializes in e-commerce development, mobile app development, CRM consulting & SI, and social media marketing services to companies of all sizes.

Custom software development firm Kainos was launched in 1986. Their midsize team is located in London, United Kingdom; Belfast, United Kingdom; Dublin , Ireland and Boston, Massachusetts. Kainos focuses on custom software development, web development, BI & big data consulting & SI, cloud consulting & SI, and more.

Based in London, United Kingdom, Core is a software development company. The firm offers custom software development, CRM consulting and SI, cloud consulting & SI, IT managed services, and more and is midsize.The firm was launched in 1990.

RiskIQ is a cybersecurity company based in San Francisco with a team of just over 150 employees. Established in 2009, they provide cybersecurity, business intelligence, big data consulting, and software integration services to clients in a variety of industries.

Founded in 2007, Lookout is a cybersecurity company. The firm focuses on cybersecurity and has a midsize team.

Founded in 1998, IOActive is a cybersecurity company. Their midsize team is headquartered in Seattle, Washington; London, United Kingdom; Madrid, Spain and , United Arab Emirates and offers cybersecurity.

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.

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.

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. 

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.