Top 100 Cybersecurity Companies in London

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Top 100 Cybersecurity Companies in London

December 2022

Looking for a top cybersecurity consultant in London?

Check out our list of the best cybersecurity consulting companies to choose a partner that can secure your company. Preventing data breaches should be the top security priority for all businesses in the digital age. 

List of the Best London Cybersecurity Consultants

  • 1
    • $5,000+
    • 50 - 249 employees
    • London, United Kingdom

    Transputec, a midsize cybersecurity company, is located in Wembley, United Kingdom. They focus on cybersecurity, IT managed services, and custom software development and were launched in 1984.

    Industries

    Notable Project

    A media and events company was looking to revamp their IT infrastructure, so they engaged with Transputec Ltd to provide them with a full audit of their entire system.

    "They came up with good solutions at a reasonable cost and delivered their tasks with minimal problems."

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  • 2
    • Scheduling

      5.0
    • Quality

      5.0
    • Cost

      5.0
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $1,000+
    • 10 - 49 employees
    • London, United Kingdom
    Evalian is a small cybersecurity and business consulting company. Based in Colden Common, United Kingdom; London, United Kingdom and Worcester, United Kingdom, the firm was founded in 2017. Their team specializes in cybersecurity and business consulting.

    Clients

    • Alliants
    • T.M Lewin
    • Copy Bet
    • Vistry Group

    Industries

    Notable Project

    Evalian held a standard Cyber Essentials Plus assessment for a software company. They run scans and offer an opportunity for remediation before they could be rescanned. 

    "They took the time to make it stress-free while maintaining the impartiality you'd expect as an assessor."

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  • 3
    • Scheduling

      4.8
    • Quality

      4.8
    • Cost

      4.5
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • Undisclosed
    • 10 - 49 employees
    • London, United Kingdom

    HewardMills is a Data Protection Office (DPO) services company based in London with offices in Dublin, San Francisco, Berlin, and Zurich. The company has a team of more than 30 that provides business consulting, cybersecurity, and corporate training services to various companies.

    Clients

    • Monzo
    • Symantec
    • iManage
    • HCL

    Notable Project

    HewardMills provides data privacy and compliance services to a marketing technology company. Their role involves evaluating the company's policies and helping them assess privacy risks appropriately. 

    "They help us achieve compliance without being very rigid."

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  • 4
    • Scheduling

      5.0
    • Quality

      5.0
    • Cost

      4.5
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $1,000+
    • 10 - 49 employees
    • London, United Kingdom

    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.

    Clients

    • Mind
    • Terrence Higgins Trust
    • NCVO
    • ACEVO

    Industries

    Notable Project

    Smartdesc helped a nonprofit membership organization transition from an outdated technology environment to Office 365 in order to facilitate remote work. They remain on board to provide ongoing support.

    "The most noteworthy thing about working with them is their ability to fix problems."

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  • 5
    • Scheduling

      5.0
    • Quality

      4.5
    • Cost

      4.5
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • Undisclosed
    • 1,000 - 9,999 employees
    • London, United Kingdom

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

    Clients

    • MED49

    Notable Project

    BSI Group performed an audit of a healthcare provider software company. The team audited the client's company in two stages to ensure ISO 13485 compliance.

    "They were very straightforward."

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  • 6
    • $1,000+
    • 10 - 49 employees
    • London, United Kingdom

    Cloudserve is a cloud solutions provider based in Bournemouth, England with an office in London. Founded in 2009, their team of fewer than 50 professionals offers IT managed services, IT strategy consulting, and cloud consulting & SI services for small and medium-sized businesses. They have experience working in various industries, including hospitality, financial services, and IT.

    Clients

    • FJB Hotels
    • BSN Social Care
    • Futur First
    • Braben

    Industries

    Notable Project

    Cloudserve Ltd migrated local servers to a central cloud environment. They integrated Office 365, SharePoint, file-sharing, and implementing abilities into the IT system. They provide ongoing support services.

    "Cloudserve Ltd has delivered exceptional ongoing support."

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  • 7
    • $5,000+
    • 10 - 49 employees
    • Tower Bridge Rd, United Kingdom

    Clear Thinking Solutions is a communication and IT solutions provider based in Essex, U.K., with an office in London. The company, founded in 2009, has a team of more than 20 that provides IT managed services, cybersecurity, and IT strategy consulting to small and midmarket companies.

    Industries

    Notable Project

    Clear Thinking IT Solutions provides extensive IT services for an insurance firm. The team handles everything to support and improve the clients' IT network security.

    "What impresses me most about their overall services is their willingness to seek to fix all problems we have."

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  • 8
    • Scheduling

      4.8
    • Quality

      4.8
    • Cost

      5.0
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $1,000+
    • 10 - 49 employees
    • London, United Kingdom

    Texaport Ltd is a tech support company based in Edinburgh, England, with a team of fewer than 10 members. Founded in 2012, the company provides cybersecurity, IT managed services, and IT strategy consulting services to mid-market firms as well as small and large companies. They have worked in various industries, such as IT, business services, and telecommunications.

    Industries

    Notable Project

    Texaport Ltd provides comprehensive IT services including 24-hour support, GDPR consulting, and troubleshooting.  

    "Their communication is top notch, and they respond to us quickly." 

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  • 9
    • Scheduling

      5.0
    • Quality

      4.9
    • Cost

      4.9
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $1,000+
    • 10 - 49 employees
    • London, United Kingdom

    Tibus Ltd is an internet company based in Belfast, Ireland that was founded in 1996. Their team of around 30 employees provides managed IT services to mid-market and small businesses in the IT sector. 

    Industries

    Notable Project

    TIBUS provides a heating products supplier with hosting, security, and website development services. The team maintains the online platform and helps with technical issues that might arise.

    "The most impressive aspect is their ability to communicate with non-technical people on a very effective level."

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  • 10
    • Scheduling

      5.0
    • Quality

      4.5
    • Cost

      5.0
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $1,000+
    • 10 - 49 employees
    • London, United Kingdom

    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.

    Clients

    • Outsell, Inc.

    Industries

    Notable Project

    Teceze supplies IT and tech support for a research advisory firm. They manage the firm’s hardware, office machines, security, and internal applications. They also troubleshoot issues as needed.

    "Teceze is proactive in terms of reaching out to end users and fixing issues."

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  • 11
    • $1,000+
    • 10 - 49 employees
    • Potters Bar, United Kingdom

    IT managed services company TWC IT Solutions was established in 2011. They are located in Potters Bar, United Kingdom; Jersey City, New Jersey and Central, Hong Kong and have a small team. Their services include IT managed services, IT strategy consulting, cloud consulting & SI, unified communications consulting & SI, and more.

    Industries

    Notable Project

    A fintech company has hired TWC IT Solutions for IT support & telephony services. They support the requirements of the client and enable them to keep their internet and phone systems up-to-date.

    "There are impressive response times, respect for boundaries, and the utmost professionalism from every team member."

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  • 12
    • Scheduling

      5.0
    • Quality

      5.0
    • Cost

      5.0
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $1,000+
    • 10 - 49 employees
    • London, United Kingdom

    Cloud consulting & SI company Corewide was established in 2015. Their small team is in London, United Kingdom. Their services include cloud consulting & SI, other IT consulting and SI, IT managed services, and cybersecurity.

    Notable Project

    Corewide provided a qualified UI developer, Python developer, and a team of DevOps experts to help a software company containerize their product to make it available as a SaaS in AWS and Microsft Azure.

    "We were very impressed by their experience and knowledge level."

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  • 13
    • $5,000+
    • 50 - 249 employees
    • London, United Kingdom

    Esynergy is a big data analytics company. They are headquartered in London, United Kingdom and have a midsize team. Their services include BI & big data consulting & SI, cloud consulting & SI, custom software development, mobile app development, and more.

    Industries

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  • 14
    • $1,000+
    • 10 - 49 employees
    • London, United Kingdom

    Established in 1999, Systemagic Ltd is an IT managed services company. The firm offers IT managed services, cloud consulting & SI, cybersecurity, and IT strategy consulting and has a small team. The firm is located in Bradford on Avon, United Kingdom and London, United Kingdom.

    Industries

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  • 15
    • Scheduling

      5.0
    • Quality

      5.0
    • Cost

      5.0
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $5,000+
    • 50 - 249 employees
    • London, United Kingdom

    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.

    Clients

    • Amazon
    • Disney
    • Bank of America
    • Box

    Industries

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  • 16
    • $5,000+
    • 250 - 999 employees
    • London, United Kingdom

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

    Industries

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  • 17
    • $5,000+
    • 50 - 249 employees
    • London, United Kingdom

    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.

    Industries

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  • 18
    • $10,000+
    • 250 - 999 employees
    • Slough, United Kingdom

    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.

    Clients

    • Box
    • Cisco
    • Dropbox
    • IBM

    Industries

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  • 19
    • $10,000+
    • 250 - 999 employees
    • London, United Kingdom

    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.

    Industries

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  • 20
    • $10,000+
    • 250 - 999 employees
    • London, United Kingdom

    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.

    Industries

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  • 21
    • $10,000+
    • 250 - 999 employees
    • London, United Kingdom

    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.

    Industries

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  • 22
    • $5,000+
    • 50 - 249 employees
    • London, United Kingdom

    Digital Shadows, a cybersecurity company, is headquartered in London, United Kingdom and Dallas, Texas. Established in 2011, the midsize team offers cybersecurity.

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  • 23
    • Undisclosed
    • 250 - 999 employees
    • London, United Kingdom

    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.

    Industries

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  • 24
    • Undisclosed
    • 250 - 999 employees
    • London, United Kingdom
    IronNet Cybersecurity is a cybersecurity company. They are headquartered in McLean, Virginia; Raleigh, North Carolina; London, United Kingdom and Singapore, Singapore and have a midsize team that focuses on cybersecurity and corporate training. The firm was launched in 2014.
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  • 25
    • Undisclosed
    • 50 - 249 employees
    • London, United Kingdom

    In London, United Kingdom, Ravelin Technology is an AI firm and cybersecurity company. The midsize firm was established in 2014. Their team specializes in Artificial Intelligence and cybersecurity.

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  • 26
    • $10,000+
    • 10 - 49 employees
    • London, United Kingdom

    Turgensec, a cybersecurity company, is located in London , United Kingdom. They offer cybersecurity and were founded in 2019.

    Industries

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  • 27
    • Undisclosed
    • 50 - 249 employees
    • London, United Kingdom
    Cybersecurity and IT managed services company OryxAlign is headquartered in London, United Kingdom and Manchester, United Kingdom. The midsize company was founded in 2006. Their team focuses on cybersecurity and IT managed services.
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  • 28
    • Undisclosed
    • 2 - 9 employees
    • 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.
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  • 29
    • $10,000+
    • 2 - 9 employees
    • London, United Kingdom

    Vuntie Limited, a cybersecurity company, was founded in 2019. Based in London, United Kingdom, their small team focuses on cybersecurity, custom software development, BI & big data consulting & SI, IoT development, and more.

    Industries

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  • 30
    • $1,000+
    • 2 - 9 employees
    • London, United Kingdom
    Cynance, a cybersecurity company, was founded in 2019. The small team focuses on cybersecurity. The firm is in London, United Kingdom.

    Industries

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