CISO Tribune

Vendor comparison · 2 companies

Quorum Cyber vs ThreatDefence

Quorum Cyber delivers Microsoft-first, threat-led cyber security services. ThreatDefence delivers a fully managed 24×7 SOC as a Service that combines its SecOps Platform with a team of cyber security experts who monitor, investigate and respond. CISO Tribune files both under MDR and managed SOC. This page sets the two records side by side: what each sells, where it is based, who owns and funds it, the customers it names and its recent news, each fact numbered to its source.

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Up to four companies side by side.

  • Quorum Cyber
  • ThreatDefence
Quorum Cyber vs ThreatDefence: Products, Customers and Funding Compared
Quorum CyberQuorum Cyber delivers Microsoft-first, threat-led cyber security services.quorumcyber.comThreatDefenceThreatDefence delivers a fully managed 24×7 SOC as a Service that combines its SecOps Platform with a team of cyber security experts who monitor, investigate and respond.threatdefence.com
What it sells
  • Clarity Defend[1][3][6]Managed detection and response service providing 24/7 monitoring, detection and response to attacks.
  • Clarity Extend[1][3]Enhanced security coverage extending monitoring to Microsoft Cloud and third-party technologies across an organization's IT ecosystem.
  • Clarity Protect[1][3]Service that detects and stops threats, reduces cyber risk, and strengthens security across Microsoft and AI environments, including a CTEM offering.
  • Clarity Data & AI[1][3]Service that helps organizations understand, protect and govern data, reducing exposure to insider threats and AI-related risks.
  • Clarity OT[3]Managed detection and response service for operational technology environments.
  • Incident Response Services[3]Services including incident response preparedness, retainer agreements, and emergency MDR for breach investigation and containment.
  • SecOps Platform[2][3][4][5]A platform providing end-to-end coverage and threat detection, backed by an AI-enabled 24x7 SOC.
  • SOC as a Service[2]A fully managed 24×7 SOC that combines the SecOps Platform with a team of cyber security experts.
  • SIEM[1][5][6]A SIEM built for investigation that connects, enriches and keeps security events searchable.
  • Network Detection and Response[3]Network Detection and Response sensors and a deception toolset to discover lateral movement.
  • Compromise Assessment[8]A review of an environment to reveal existing or past intrusions and security weaknesses.
  • Cyber Risk Management[9]A solution that assists customers in proactively identifying security gaps in their environment.
  • Cyber Range[10]Cyber range solutions with simulations of cyber attacks for cyber security teams and students.
Categories
Headquarters
Edinburgh, United Kingdom[1]Not stated on its pages
Founded
Not stated on its pagesNot stated on its pages
Ownership and funding
Not stated on its pagesNot stated on its pages
Named customers
Not stated on its pagesNot stated on its pages
Recent news
  • September 16, 2026Quorum Cyber announced that it has signed a definitive agreement to acquire Ontinue, a managed extended detection and response provider.[12]
Not stated on its pages
G2 and Gartner Peer Insights
  • G2: Not stated on its pages
  • Gartner Peer Insights: Not stated on its pages
  • G2: Not stated on its pages
  • Gartner Peer Insights: Not stated on its pages
Who it fits
Not written yetNot written yet
Last verified
October 7, 2026November 10, 2026

Where they overlap

  • MDR and managed SOC is the primary category of both Quorum Cyber and ThreatDefence.

Where they differ, field by field

  • Quorum Cyber is also filed under Incident response and forensics, Security consulting and advisory and OT and ICS security. ThreatDefence is also filed under SIEM, AI SOC analysts and Network detection and response.
  • Quorum Cyber lists Clarity Defend, Clarity Extend, Clarity Protect, Clarity Data & AI, Clarity OT and 1 more. ThreatDefence lists SecOps Platform, SOC as a Service, SIEM, Network Detection and Response, Compromise Assessment and 2 more.
  • Quorum Cyber is headquartered in Edinburgh, United Kingdom.

What it sells: ThreatDefence

What SOC as a Service does[2]
ThreatDefence continuously monitors customer environments across cloud, network, endpoints, identity and applications. ThreatDefence analysts conduct scheduled and intelligence-led hunts to identify indicators of compromise, lateral movement, credential misuse and living-off-the-land activity. ThreatDefence customers have access to a dedicated portal with real-time dashboards, incident timelines, analyst notes, reporting and service visibility.
What Network Detection and Response does[3]
ThreatDefence offers Network Detection and Response sensors and a deception toolset to discover lateral movement. ThreatDefence network detection covers lateral movement and insider threats using session evidence and packet analysis. ThreatDefence agents connect network findings with endpoint and identity activity, helping analysts assess the scope and prepare targeted containment.
What Compromise Assessment does[8]
ThreatDefence offers a Compromise Assessment that helps reveal existing or past intrusions, identify vulnerabilities or weaknesses, and detect malicious activity, policy violations and security misconfigurations. ThreatDefence deploys sensors to collect real-time data from endpoints, cloud and network. ThreatDefence inspects an environment over an extended period of time to identify dormant malware or covert threat actors.
What Cyber Risk Management does[9]
ThreatDefence offers a Cyber Risk Management solution that assists customers in proactively identifying security gaps in their environment. ThreatDefence provides automated weekly and monthly reporting based on operational and compliance needs. ThreatDefence pinpoints vulnerable, exploitable or misconfigured systems in a customer network.
What Cyber Range does[10]
ThreatDefence offers cyber range solutions that provide simulations of cyber attacks for cyber security teams and students. ThreatDefence runs simulations on virtual replicas of critical infrastructure networks including power grids, train control systems and water treatment plants. The platform of ThreatDefence organizes trainees into groups dedicated to specific missions and objectives.

Questions about Quorum Cyber and ThreatDefence

What do Quorum Cyber and ThreatDefence sell?
Quorum Cyber sells Clarity Defend, Clarity Extend, Clarity Protect, Clarity Data & AI, Clarity OT and 1 more. ThreatDefence sells SecOps Platform, SOC as a Service, SIEM, Network Detection and Response, Compromise Assessment and 2 more.
Are Quorum Cyber and ThreatDefence in the same category?
Yes. MDR and managed SOC is the primary category of both on CISO Tribune.
Where are Quorum Cyber and ThreatDefence headquartered?
Quorum Cyber is headquartered in Edinburgh, United Kingdom.
What have Quorum Cyber and ThreatDefence announced recently?
September 16, 2026: Quorum Cyber announced that it has signed a definitive agreement to acquire Ontinue, a managed extended detection and response provider.

About Quorum Cyber

Quorum Cyber delivers Microsoft-first, threat-led cyber security services. Quorum Cyber was founded in Edinburgh in 2016. Federico Charosky founded Quorum Cyber. Quorum Cyber is a Microsoft Solutions Partner for Security and works with the Microsoft Security stack, including Microsoft 365 Defender and Microsoft Sentinel.

Quorum Cyber says AI changes how organisations work and how attackers operate. Quorum Cyber helps security teams protect data, manage emerging risks and enable secure adoption.

Clarity is more than the name of Quorum Cyber's customer platform and managed security services. Quorum Cyber unifies Microsoft 365 Defender and Microsoft Sentinel in Clarity, turning raw signals into prioritised incidents. Quorum Cyber offers three managed detection and response services, plus a dedicated data security service.[6]

Quorum Cyber's Cyber Resilience Assessment evaluates how well an organisation can manage cyber disruption. Quorum Cyber's Security Maturity Assessment looks at the effectiveness of a wider security programme, including governance, controls and risk management.[7]

Quorum Cyber has an Incident Response team that helps organisations investigate and manage cyber incidents. Quorum Cyber's Security Operations Centre works to detect and respond to customer threats. Quorum Cyber offers an incident response retainer that customers can initiate. Quorum Cyber offers Managed XDR, which integrates with Microsoft Security Technology. Quorum Cyber works with the generative AI capabilities of Copilot for Security to help defend customers against cyber threats. Quorum Cyber has a Threat Intelligence team. Following two acquisitions in 2024, Quorum Cyber's services range from phishing simulation and managed services to incident response and ransom negotiation.[7][8][9][10]

Quorum Cyber states that it protects 400+ organisations across four continents. Quorum Cyber has over 350 employees across the UK, US, Canada and UAE. Quorum Cyber is also a member of the Microsoft Intelligent Security Association and a Microsoft Security Copilot Partner.[6][7][11]

Quorum Cyber on the record

Sources

Quorum Cyber full record

  1. [1]quorumcyber.comQuorum Cyber · quorumcyber.com · undated page, accessed October 7, 2026 · Tier A
  2. [2]Difenda will rebrand as quorum cyberQuorum Cyber · quorumcyber.com · undated page, accessed October 7, 2026 · Tier A
  3. [3]Microsoft Cyber Security Services Provider | Quorum CyberQuorum Cyber · undated page, accessed October 31, 2026 · Tier A
  4. [4]About Quorum | Cyber Security CompanyQuorum Cyber · undated page, accessed November 10, 2026 · Tier A
  5. [5]Why I’m Passionate about Protecting British Organisations from Cybercrime - Quorum CyberQuorum Cyber · undated page, accessed November 10, 2026 · Tier A
  6. [6]Managed Security Services | Quorum CyberQuorum Cyber · undated page, accessed November 10, 2026 · Tier A
  7. [7]Cyber Resilience Assessment | Quorum CyberQuorum Cyber · undated page, accessed November 10, 2026 · Tier A
  8. [8]Quorum Cyber Managed XDR integrates with Microsoft Security Technology - Quorum CyberQuorum Cyber · undated page, accessed November 10, 2026 · Tier A
  9. [9]Quorum Cyber is leveraging Copilot for Security at scale - Quorum CyberQuorum Cyber · undated page, accessed November 10, 2026 · Tier A
  10. [10]Customers Informed of Microsoft Data Breach - Quorum CyberQuorum Cyber · undated page, accessed November 10, 2026 · Tier A
  11. [11]Quorum Cyber appoints Chief Information Security OfficerQuorum Cyber · undated page, accessed November 10, 2026 · Tier A
  12. [12]Quorum Cyber Announces Intent to Acquire Ontinue, Building an Unrivaled Microsoft-First Agentic SOC for the Autonomous Threat EraPRNewswire · published September 16, 2026 · Tier A

ThreatDefence full record

  1. [1]threatdefence.comThreatDefence · threatdefence.com · undated page, accessed November 10, 2026 · Tier A
  2. [2]24x7 SOC as a Service | Managed SOC Monitoring and ResponseThreatDefence · undated page, accessed November 11, 2026 · Tier A
  3. [3]Enterprise Security Operations Platform | 24x7 SOC and SIEMThreatDefence · undated page, accessed November 11, 2026 · Tier A
  4. [4]24x7 Security Operations Team | ThreatDefenceThreatDefence · undated page, accessed November 11, 2026 · Tier A
  5. [5]AI-Enabled Security Operations Platform and 24x7 SOC | ThreatDefenceThreatDefence · undated page, accessed November 11, 2026 · Tier A
  6. [6]SIEM as a Service | Next Generation Cloud SIEM | ThreatDefenceThreatDefence · undated page, accessed November 11, 2026 · Tier A
  7. [7]Industrial SecOps Platform for OT Security | ThreatDefenceThreatDefence · undated page, accessed November 11, 2026 · Tier A
  8. [8]Cyber Security Compromise Assessment | Breach Detection & Forensics - ThreatDefenceThreatDefence · undated page, accessed November 11, 2026 · Tier A
  9. [9]Cybersecurity Risk Management Services | Enterprise Risk Protection | ThreatDefenceThreatDefence · undated page, accessed November 11, 2026 · Tier A
  10. [10]Cyber Security Simulation & Attack Simulation Platform | ThreatDefenceThreatDefence · undated page, accessed November 11, 2026 · Tier A
  11. [11]Evidence-Based Security for Financial Services | ThreatDefenceThreatDefence · undated page, accessed November 11, 2026 · Tier A

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