CISO Tribune

Vendor comparison · 2 companies

Quorum Cyber vs UltraViolet Cyber

Quorum Cyber delivers Microsoft-first, threat-led cyber security services. UltraViolet Cyber sells security services that run offensive and defensive operations as one integrated team. 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
  • UltraViolet Cyber
Quorum Cyber vs UltraViolet Cyber: Products, Customers and Funding Compared
Quorum CyberQuorum Cyber delivers Microsoft-first, threat-led cyber security services.quorumcyber.comUltraViolet CyberUltraViolet Cyber sells security services that run offensive and defensive operations as one integrated team.uvcyber.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.
  • Managed SOC[1][4][11]Named analysts monitor customer environments, investigate threats and take pre-authorized response actions.
  • UltraViolet Lens[7]A platform with an open architecture that ingests Digital Exhaust from telemetry devices.
Categories
Headquarters
Edinburgh, United Kingdom[1]McLean, United States[2]
Founded
Not stated on its pages2023[3][11]
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 yetUltraViolet Cyber describes delivery models that work with a customer's existing investments, team and stage of maturity. Engagements can be co-managed, fully outsourced or embedded with the customer team. UltraViolet Cyber's SIEM migration work includes a global provider of digital banking and lending solutions that decided to replace its legacy SIEM.
Last verified
October 7, 2026November 9, 2026

Where they overlap

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

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. UltraViolet Cyber is also filed under Penetration testing and red team services.
  • Quorum Cyber lists Clarity Defend, Clarity Extend, Clarity Protect, Clarity Data & AI, Clarity OT and 1 more. UltraViolet Cyber lists Managed SOC and UltraViolet Lens.
  • Quorum Cyber is headquartered in Edinburgh, United Kingdom. UltraViolet Cyber is headquartered in McLean, United States.
  • UltraViolet Cyber was founded in 2023.

How they differ

CISO Tribune files Quorum Cyber under MDR and managed SOC, Incident response and forensics, Security consulting and advisory, and OT and ICS security, with MDR and managed SOC as its primary category. CISO Tribune files UltraViolet Cyber under MDR and managed SOC and Penetration testing and red team services, with MDR and managed SOC as its primary category. Both companies therefore sell managed detection and response, and each adds a different second line of work. Quorum Cyber adds incident response services and Clarity OT, a managed detection and response service for operational technology environments. UltraViolet Cyber adds adversary simulation and purple teaming, and its Solstice platform powers its penetration testing services.

Quorum Cyber is headquartered in Edinburgh, United Kingdom, and was founded there in 2016. It delivers Microsoft-first services and is a Microsoft Solutions Partner for Security. UltraViolet Cyber is headquartered in McLean, United States, and was founded in 2023 by former U.S. intelligence community operators. It is vendor-agnostic across SIEM, EDR, and cloud.

Quorum Cyber states that it protects 400+ organisations across four continents. UltraViolet Cyber supports 400+ Global 2000 enterprises and federal agencies, including DHS, FDIC and NIH. On September 16, 2026, Quorum Cyber announced a definitive agreement to acquire Ontinue, a managed extended detection and response provider.

What it sells: UltraViolet Cyber

What Managed SOC does[1][4][11]
UltraViolet Cyber assigns named analysts who monitor the customer environment, investigate threats, and take pre-authorized response actions. UltraViolet Cyber operates the customer security stack or provides a managed SIEM and SOAR platform.
What UltraViolet Lens does[7]
The UltraViolet Lens Platform has an open architecture that ingests terabytes of Digital Exhaust from various telemetry devices each day. UltraViolet Cyber provides 24/7/365 alert monitoring, triage and escalation by certified security engineers.

Questions about Quorum Cyber and UltraViolet Cyber

What do Quorum Cyber and UltraViolet Cyber sell?
Quorum Cyber sells Clarity Defend, Clarity Extend, Clarity Protect, Clarity Data & AI, Clarity OT and 1 more. UltraViolet Cyber sells Managed SOC and UltraViolet Lens.
Are Quorum Cyber and UltraViolet Cyber in the same category?
Yes. MDR and managed SOC is the primary category of both on CISO Tribune.
Where are Quorum Cyber and UltraViolet Cyber headquartered?
Quorum Cyber is headquartered in Edinburgh, United Kingdom. UltraViolet Cyber is headquartered in McLean, United States.
When were Quorum Cyber and UltraViolet Cyber founded?
UltraViolet Cyber was founded in 2023.
Who are Quorum Cyber and UltraViolet Cyber sold to?
UltraViolet Cyber describes delivery models that work with a customer's existing investments, team and stage of maturity.
What have Quorum Cyber and UltraViolet Cyber 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

UltraViolet Cyber full record

  1. [1]uvcyber.comUltraViolet Cyber · uvcyber.com · published September 25, 2026 · Tier A
  2. [2]Ultraviolet cyber launches to help organizations worldwide accelerate readiness and resilience against cybersecurity threats 301796166UltraViolet Cyber via PR Newswire · prnewswire.com · published April 13, 2023 · Tier A
  3. [3]Frequently asked questionsUltraViolet Cyber · uvcyber.com · undated page, accessed September 27, 2026 · Tier A
  4. [4]Managed SOC Services | 24/7 Managed SOC | UltraViolet CyberUltraViolet Cyber · undated page, accessed October 30, 2026 · Tier A
  5. [5]Unified Offensive and Defensive Security Solutions | UltraViolet CyberUltraViolet Cyber · undated page, accessed October 30, 2026 · Tier A
  6. [6]Application Security Testing Services | Web, API & Cloud App Security | UltraViolet CyberUltraViolet Cyber · undated page, accessed October 30, 2026 · Tier A
  7. [7]UltraViolet Lens Security Platform | Security Analytics & Detection Engineering | UltraViolet CyberUltraViolet Cyber · undated page, accessed October 30, 2026 · Tier A
  8. [8]Equinox: Detection Engineering Tool | UltraViolet CyberUltraViolet Cyber · undated page, accessed October 30, 2026 · Tier A
  9. [9]Red Team Engagements | Adversary Simulation & Advanced Threat Emulation | UltraViolet CyberUltraViolet Cyber · undated page, accessed October 30, 2026 · Tier A
  10. [10]VooDoo Red Team Toolkit | Cross-Platform Offensive Security Platform | UltraViolet CyberUltraViolet Cyber · undated page, accessed October 30, 2026 · Tier A
  11. [11]Cybersecurity Solutions | Managed SOC, MDR, Red Team & Pen Testing | UltraViolet CyberUltraViolet Cyber · undated page, accessed November 10, 2026 · Tier A
  12. [12]Managed Detection and Response (MDR) Services | Threat Detection & Response | UltraViolet CyberUltraViolet Cyber · undated page, accessed November 10, 2026 · Tier A
  13. [13]Purple Team Security Services | Offensive & Defensive Security Testing | UltraViolet CyberUltraViolet Cyber · undated page, accessed November 10, 2026 · Tier A
  14. [14]Solstice: AI-Augmented Penetration Testing | UltraViolet CyberUltraViolet Cyber · undated page, accessed November 10, 2026 · Tier A
  15. [15]SIEM Migration Services | Maintain Detection & Visibility | UltraViolet CyberUltraViolet Cyber · undated page, accessed November 10, 2026 · Tier A
  16. [16]Continuous Threat Exposure Management (CTEM) | Attack Surface Risk Monitoring | UltraViolet CyberUltraViolet Cyber · undated page, accessed November 10, 2026 · Tier A
  17. [17]Embedded Security Operations Experts & Support | Cybersecurity Staff AugmentationUltraViolet Cyber · undated page, accessed November 10, 2026 · Tier A
  18. [18]AI Security Services | AI Threat Monitoring & Red Teaming | UltraViolet CyberUltraViolet Cyber · undated page, accessed November 10, 2026 · Tier A

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