Top 100 IT Services Companies in London

TAR Solutions is a big data consulting firm based in London with a team of fewer than 10 members. Founded in 2014, they are experts in big data consulting and Si for mid-market and enterprise-level clients, primarily in the field of financial services.

BSI Group is an IT firm headquartered in London. Their midsized team specializes in cybersecurity, IT strategy consulting, and business consulting. 

XpertCloudSolutions is a small cloud consulting & SI company based in London, United Kingdom. Launched in 2020, the team specializes in cloud consulting & SI, IT strategy consulting, and IT managed services.

HEXENS is a London, United Kingdom-based cybersecurity company. The small company was established in 2021. Their team focuses on cybersecurity.

Noxtton was founded in 2016 and is headquartered in Tbilisi, Ga. with another location in London. With 16 employees, they provide cybersecurity, web design, and mobile and app marketing for midmarket and small businesses.

Smile IT Solutions is a cloud consulting & SI company. The small Borehamwood, United Kingdom-based team provides cloud consulting & SI, custom software development, IT managed services, web development, and more. The company was established in 2015.

DevGrid is a software development firm founded in 2015. Their midsize team is headquartered in London, United Kingdom and Caxias do Sul, Brazil and focuses on custom software development, IoT development, mobile app development, IT staff augmentation, and more.

Midsize IT managed services company Elisha Telecom Ltd., is in London, United Kingdom and Quezon City, Philippines. They focus on IT managed services, Artificial Intelligence, ai consulting, and generative ai and were established in 2006.

Software development company Pretius is located in Warszawa, Poland. They offer custom software development, IT staff augmentation, enterprise app modernization, and IT managed services and were established in 2006.

Software agency Atlas - Clever Software is headquartered in Essex and another office in London. With 17 employees, the agency specializes in web, custom software, mobile app development, and more for mainly midmarket businesses.

Sales outsourcing company SalesCaptain was launched in 2021. Their small team is located in London, United Kingdom. SalesCaptain provides sales outsourcing, direct marketing, CRM consulting and SI, call center services, and more.

Business consulting company Metheus Consultancy Ltd is based in London, United Kingdom. The small agency was established in 2021. Their team focuses on business consulting, market research, marketing strategy, digital strategy, and more.

Founded in 2004, HeadChannel is a software development firm that offers custom software development, web development, and mobile app development services to their small business and mid-market clients in the IT industry. Their 50 employees are based out of offices in London and Katowice, Poland.

Hype Software Studio LTD is an ERP consulting and SI company. Launched in 2022, the small firm is in London, United Kingdom. Their services include ERP consulting and SI, IT strategy consulting, CRM consulting and SI, BI & big data consulting & SI, and more.

Growth Notion is a small SEO agency. In London, United Kingdom; Hong Kong, Hong Kong and Szczecin, Poland, the agency was launched in 2012. Their services include search engine optimization, pay per click, email marketing, digital strategy, and more.

Teceze Ltd is a London-based IT company founded in 2012 with more than 10 employees. They are experts in IT strategy consulting, cybersecurity, and IT managed services for clients that work in the industries of business services, consumer products, and more.

8th Light is a software consultancy firm headquartered in Chicago, with other offices in Los Angeles, New York, and London. The agency and its team of 110+ has experience in web development, custom software development, web design, mobile app development, and cloud consulting.

Persistent Systems is a software development firm based in Pune, India. Founded in 1990, their team of over 12,000 employees provides custom software development, CRM consulting, and IT strategy services.

ClerksWell is a custom software development firm. They are headquartered in London, United Kingdom and have a midsize team that focuses on custom software development, web development, IT strategy consulting, web design, and more. The firm was founded in 1996.

Sera Neon is an Oracle Cloud specialist company based in London. The company, founded in 2010, has a team of more than 15 that provides IT strategy consulting, cloud consulting & SI, CRM consulting & SI, and ERP consulting & SI services. Sera Neon serves mid-market and enterprise companies and institutions in various sectors that include government and utilities.

ValueLabs is a global business technology services and solutions provider based in Hyderabad, India with over 25 offices worldwide in the US, Europe, and Asia. Founded in 1997, ValueLabs' team of over 5,000 employees provides non-voice BPO/back office services and voice/call center capabilities.

Testinium is a software testing company based in Istanbul with an office in Den Haag, Netherlands. The company, founded in 2009, has more than around 300 employees and provides application testing, AI, business consulting, and custom software development services. Testinium serves enterprise and mid-market companies in various industries.

Custom software development firm Quontex is based in LONDON, United Kingdom and Sofiivska Borshchahivka, Ukraine. The midsize agency was established in 2017. Their services include custom software development, IT staff augmentation, BI & big data consulting & SI, IT managed services, and more.

Web development firm Rafiki was established in 2023. The company provides web development, product design, IT managed services, and Artificial Intelligence and has a midsize team. The company is based in London, United Kingdom.

CloudSense is a cloud consulting & SI company. The midsize London, United Kingdom-based team specializes in cloud consulting & SI. The firm was launched in 2009.

The Data Analysis Bureau is a data science and engineering innovation agency focusing in artificial intelligence and cloud consulting & SI. Founded in 2016, they're based in London. Their team of around 20 employees serves mostly midmarket and enterprise clients. 

Big data company TagDataTrust was founded in 2017. The small team focuses on BI & big data consulting & SI, IT strategy consulting, digital strategy, conversion optimization, and more. The company is headquartered in London, United Kingdom.

House Of Progress is a growth marketing agency that provides digital strategy, conversion optimization, and market research services to their small business, enterprise, and mid-market clients in the consumer products and services, retail, and other industries. Based in Bucharest, their team is made up of 10 employees.

Ignitho Technologies is a New York-based digital technology solutions company founded in 2013. Their team of 55 employees specializes in custom software development and IT services. Their clients are typically midmarket businesses in the financial services, retail, and hospitality industries.

Testdel UK Ltd. Is a small application testing company. Launched in 2015, the team provides application testing, IT managed services, IT strategy consulting, and other IT consulting and SI. The firm is located in Harrow, United Kingdom and Chandigarh, India.