Top 100 Cybersecurity Companies in London

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Top 100 Cybersecurity Companies in London

The Best of December 2025

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

  • 31

    (0 Reviews)

    Not yet reviewed.

    $5,000+
    10 - 49 employees
    London, England
    CovertSwarm is a Cybersecurity company. Based in London, England and Wilmington, Delaware, their team offers Cybersecurity.
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  • 32

    (0 Reviews)

    Not yet reviewed.

    $250,000+
    2 - 9 employees
    London, England
    SanRa is a Cybersecurity company established in 2022. The small team specializes in Cybersecurity.
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  • 33

    (0 Reviews)

    Not yet reviewed.

    Undisclosed
    250 - 999 employees
    Lake Oswego, OR
    Founded in 1986, Online Business Systems is a Cybersecurity company. The team specializes in Cybersecurity and IT strategy consulting.
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  • 34

    (0 Reviews)

    Not yet reviewed.

    Undisclosed
    250 - 999 employees
    London, England
    Professional Advantage is a midsize ERP consulting and SI company in North Sydney, Australia and Melbourne, Australia. Their services include ERP consulting and SI and cloud consulting & SI.
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  • 35

    (0 Reviews)

    Not yet reviewed.

    $10,000+
    50 - 249 employees
    Stanmore, England
    Micromindercs is a Cybersecurity company. Launched in 2018, the team focuses on Cybersecurity and IT managed services.
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  • 36

    (0 Reviews)

    Not yet reviewed.

    Undisclosed
    250 - 999 employees
    Kent, England
    Air IT is an IT strategy consulting company established in 2005. Based in Sandiacre, England and Birmingham, England, the team specializes in IT strategy consulting and cloud consulting & SI.
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  • 37

    (0 Reviews)

    Not yet reviewed.

    $1,000+
    50 - 249 employees
    London, England
    Midsize Cybersecurity company Clear Infosec, is based in Jersey City, New Jersey and Toronto, Canada. The team focuses on Cybersecurity and IT strategy consulting.
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  • 38

    (0 Reviews)

    Not yet reviewed.

    Undisclosed
    250 - 999 employees
    London, England
    Redscan is a Cybersecurity company founded in 2015. Their team offers Cybersecurity.
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  • 39

    (0 Reviews)

    Not yet reviewed.

    $10,000+
    10 - 49 employees
    London , England
    Turgensec is a small Cybersecurity company headquartered in London , England. Their services include Cybersecurity.
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  • 40

    (0 Reviews)

    Not yet reviewed.

    $1,000+
    10 - 49 employees
    London, England
    Sectricity is a Cybersecurity company established in 2021. In Merelbeke-Melle, Belgium and London, England, the team specializes in Cybersecurity.
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  • 41

    (0 Reviews)

    Not yet reviewed.

    Undisclosed
    2 - 9 employees
    City of London, England
    CyPro, a Cybersecurity company, was established in 2021. Headquartered in City of London, England, the team focuses on Cybersecurity.
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  • 42

    (0 Reviews)

    Not yet reviewed.

    Undisclosed
    2 - 9 employees
    London, England
    SES Escrow is a Cybersecurity company. The Handforth, England-based agency was founded in 2008. Their services include Cybersecurity.
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  • 43

    (0 Reviews)

    Not yet reviewed.

    $1,000+
    2 - 9 employees
    London, England
    Headquartered in London, England, Cynance is a Cybersecurity company. Established in 2019, the team specializes in Cybersecurity.
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  • 44

    (0 Reviews)

    Not yet reviewed.

    $10,000+
    250 - 999 employees
    London, England
    Exponential-e, a Cybersecurity company, specializes in Cybersecurity and cloud consulting & SI. The firm is based in London, England.
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  • 45

    (0 Reviews)

    Not yet reviewed.

    Undisclosed
    2 - 9 employees
    London, England
    Cybersecurity company Cyber Legion was launched in 2021. Located in London, England, the team offers Cybersecurity and Application Testing.
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  • 46

    (0 Reviews)

    Not yet reviewed.

    $25,000+
    50 - 249 employees
    City of London, England
    Opus Technology is a Cybersecurity company. The company is in Reigate, England and City of London, England. Their services include Cybersecurity and IT managed services.
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    Clients

    Which? The consumer champion All Saints Fred Olsen Dignity Funerals PLC

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  • 47

    (0 Reviews)

    Not yet reviewed.

    $5,000+
    10 - 49 employees
    London, England
    Established in 2021, Kloudwerk is a Cybersecurity company. The small team specializes in Cybersecurity.
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  • 48

    (0 Reviews)

    Not yet reviewed.

    $5,000+
    10 - 49 employees
    London, England
    Established in 2020, Securityium is a Cybersecurity company. The team offers Cybersecurity and IT strategy consulting.
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  • 49

    (0 Reviews)

    Not yet reviewed.

    Undisclosed
    2 - 9 employees
    London, England
    HookPhish is a Cybersecurity company. They are in London, England, and their services include Cybersecurity.
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  • 50

    (0 Reviews)

    Not yet reviewed.

    $5,000+
    250 - 999 employees
    Praha 5, Czech Republic
    Soitron is a Bratislava 25, Slovakia-based IT managed services company. The team provides IT managed services and IT staff augmentation.
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    Clients

    HPE

    Industries

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  • 51

    (0 Reviews)

    Not yet reviewed.

    $5,000+
    250 - 999 employees
    Borehamwood, England
    Raygain Technologies is a cloud consulting & SI company. Located in Borehamwood, England and New Delhi, India, their team focuses on cloud consulting & SI and Cybersecurity.
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  • 52

    (0 Reviews)

    Not yet reviewed.

    Undisclosed
    10 - 49 employees
    London, England
    GoAllSecure is a Cybersecurity company launched in 2022. The firm provides Cybersecurity and cloud consulting & SI.
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  • 53

    (0 Reviews)

    Not yet reviewed.

    Undisclosed
    10 - 49 employees
    London, England
    SURFSecurity is a Cybersecurity company. They are headquartered in London, England and have small team. They offer Cybersecurity.
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  • 54

    (0 Reviews)

    Not yet reviewed.

    Undisclosed
    2 - 9 employees
    London, England
    RockSec Group, a small Cybersecurity company, is located in London, England. Their services include Cybersecurity and cloud consulting & SI.
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  • 55

    (0 Reviews)

    Not yet reviewed.

    $1,000+
    10 - 49 employees
    London, England
    Secore Information Security Ltd is a Cybersecurity company. The London, England-based agency was launched in 2023. Their team specializes in Cybersecurity.
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  • 56

    (0 Reviews)

    Not yet reviewed.

    Undisclosed
    2 - 9 employees
    London, England
    Founded in 2020, Cyber Sense Limited is a Cybersecurity company. The team offers Cybersecurity and Application Testing.
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  • 57

    (0 Reviews)

    Not yet reviewed.

    Undisclosed
    250 - 999 employees
    London, England
    Based in London, England, Marshall Info Tech is a midsize IT managed services company. The team specializes in IT managed services and Cybersecurity.
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  • 58

    (0 Reviews)

    Not yet reviewed.

    Undisclosed
    10 - 49 employees
    London, England
    Founded in 2013, First Response is a Cybersecurity and IT managed services company. The team focuses on Cybersecurity and IT managed services.
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  • 59

    (0 Reviews)

    Not yet reviewed.

    Undisclosed
    50 - 249 employees
    London, England
    Established in 2011, Callsign is an artificial intelligence firm. The team provides Artificial Intelligence and Cybersecurity.
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  • 60

    (0 Reviews)

    Not yet reviewed.

    $5,000+
    50 - 249 employees
    London, England
    Lightrove Technology is a midsize Cybersecurity company founded in 2020. Their services include Cybersecurity and IT staff augmentation.
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