Top 100 Systems Integrator Companies in London

Founded in 2017, Lambert Labs is a software development agency that specializes in Python. Their team of fewer than 10 employees is based in London. They also provide web development services and application testing. 

Quema OÜ is a small IT strategy consulting and cloud consulting & SI company. The Tallinn, Estonia-based company was founded in 2022. Their team offers IT strategy consulting and cloud consulting & SI.

Thoughtbot is a web and mobile app development company based in Boston, MA with offices in Austin, San Francisco, New York, Raleigh, Washington D.C, and London. Since 2003, this 50+ team has delivered empowering digital solutions to enterprise-level and small companies alike.

IT Labs, a IT strategy consulting company, is in Palm Beach Gardens, Florida; London, United Kingdom; Noordwijk, Netherlands and Skopje, North Macedonia. Founded in 2005, the midsize team focuses on IT strategy consulting, cloud consulting & SI, custom software development, and blockchain.

Established in 2007, Systango Technologies is a global digital product development agency. They are headquartered in London and have additional international offices. Most clients are small businesses, many of which are in the entertainment, utilities, and hospitality sectors. 

Abacus Cambridge Partners is a tech consultancy and BPO company that was founded in 2017. The core London-based team of about 50 coordinates voice, ERP consulting and system integration, IT strategy consulting services for midmarket and enterprise-sized clients in the e-commerce space.

Index.dev, a software development firm, was established in 2019. The midsize LONDON, United Kingdom-based team specializes in custom software development, web development, mobile app development, wearable app development, and more.

Digital Litmus is a marketing and digital agency based in London. Founded in 2015, their team of around 10 employees specializes in content marketing, digital strategy, and PPC.

Oleg Chulakov Studio is a digital agency. The agency, founded in 2009, has more than 50 employees and provides web design and development, UX/UI design, product design, mobile app development, and e-commerce development services. Oleg Chulakov Studio serves small and larger-sized companies in the financial services, e-commerce, telecommunications, and real estate industries.

Cloudflex, a custom software development firm, is in Kyiv, Ukraine. The small team specializes in custom software development, mobile app development, web development, Artificial Intelligence, and more. The firm was founded in 2018.

3 SIDED CUBE is an accredited app development and digital product agency headquartered in Bournemouth, England with additional locations in London, Chicago, and Washington, DC. Since their ambitious beginning in 2009, the team of about 38 has collaborated with startups and international organizations, reaching over 87 countries and more than 100 million global downloads. In addition to mobile app development, they also provide UX/UI design services to inspirational organizations.

Artificial intelligence company blackthorn.ai is headquartered in London, United Kingdom. Launched in 2021, the small team offers Artificial Intelligence, IT staff augmentation, and custom software development.

SovTech is a custom software development company based in Johannesburg with offices in London and Nairobi. Founded in 2012, they work with enterprise and midmarket businesses with a focus on clients in the financial services industry. 

SoftProdigy is a software services provider headquartered in Budd Lake, NJ, with offices in India in Mohali, Chandigarh, and Ludhiana. Founded in 2006, SoftProdigy has about 250 employees that primarily provide small and midmarket businesses with web development and mobile app development services, although it can also offer SEO, blockchain, and social media marketing capabilities.

Mobcoder is a software development company based in Seattle. They also have an office in Noida, India. Founded in 2014, their team of 40 employees provides mobile app development, custom software, and web development services to its midmarket and small business clients. They also serve enterprise clients. 

Kalinax is a big data agency based in Lisbon, Portugal with more than two experts. Founded in 2016, they specialize in big data and business consulting services for clients ranging from startups to enterprises in the industries of telecommunications, transportation, and more.

Intellectsoft is a boutique digital transformation consultancy headquartered in Palo Alto, California. The Company provides cutting edge engineering solutions for global and Fortune 500 companies with the mission to help enterprises accelerate adoption of new technologies, untangle complex issues that always emerge during digital evolution, and orchestrate ongoing innovation.

Intellectsoft maintains its advanced domain expertise through five dedicated labs:  Cognitive Computing, Decentralized Applications (i.e. Blockchain), Internet-of-Things (IOT), Premier Customer Experience (CX), and Mixed Reality (AR, VR).

Established in 2007, Intellectsoft operates across multiple offices with the engineering centers in the U.S., the U.K., the Nordic region and Eastern Europe.

Global Talent is an IT firm based in London with more than 50 experts. Since their founding in 2017, they have provided IT staff augmentation, custom software development, and IT strategy consulting solutions for clients ranging from small firms to large companies.

Gemstone is a big data company. The small Chorleywood, United Kingdom-based agency was founded in 2008. Their team specializes in BI & big data consulting & SI, web development, mobile app development, web design, and more.

The Virtual Forge, a big data analytics company, was established in 2010. The midsize Holt, United Kingdom-based team provides BI & big data consulting & SI, custom software development, cloud consulting & SI, devops managed services, and more.

Heveloon ltd is a mobile app development company in London, United Kingdom. Founded in 2018, they have about 5 employees that serve mostly small-business and midmarket clients in the medical, business, and financial services sectors. Services include mobile app development, blockchain, and enterprise app modernization. 

ERP consulting and SI company Professional Advantage is in North Sydney, Australia. The midsize team offers ERP consulting and SI, cloud consulting & SI, BI & big data consulting & SI, cybersecurity, and more and was established in 1989.

We Are Telescopic, a software development company, was established in 2013. The company offers custom software development, web development, mobile app development, ux/ui design, and more and has a small team.

Nordcloud is a midsize cloud consulting & SI company. The Helsinki, Finland-based firm was founded in 2011. Their team offers cloud consulting & SI and IT managed services.

Influential Software is a software development firm in London, United Kingdom; Maidstone, United Kingdom and Glasgow, United Kingdom. The firm focuses on custom software development, web development, BI & big data consulting & SI, IT managed services, and more and has a midsize team.The firm was launched in 1993.

DIGIMETA DEV LTD is a midsize. Established in 2022, the company is located in London, United Kingdom; Gloucester, United Kingdom and Bengaluru, India. Their services include.

MediaAgility, a midsize cloud consulting & SI company, is based in Princeton, New Jersey; Gurugram, India; San Jose, California and Brentford, United Kingdom. Launched in 2011, the team offers cloud consulting & SI, unified communications consulting & SI, and other IT consulting and SI.

Smartdesc is a London-based IT company with a team of fewer than 50 people. Founded in 2011, they offer IT strategy consulting, cloud consulting, and cybersecurity solutions for small and mid-market businesses, primarily non-profit organizations.

Fulcrum Digital is an IT firm based in Jersey City, N.J. with more than 1,000 members worldwide. Founded in 1999, they are experts in IT strategy consulting, ERP consulting, and IT managed services for mid-market and enterprise-level clients alike.

IT Path Solutions is a services and solutions company with offices in Ahmedabad, India; Moorseville, N.C.; and Harrow, U.K. It was founded in 2012 and has more than 80 employees. They provide mobile app development, web development, and cloud consulting and SI services. Their clients primarily consist of midmarket and small business clients in the IT, consumer products & services, education, and health care & medicine industries.