CISO Tribune

Vendor comparison · 2 companies

Leidos vs Quorum Cyber

Leidos is a technology company that serves government and commercial customers with digital and mission innovations, with AI, cyber and mission software at its core. Quorum Cyber delivers Microsoft-first, threat-led cyber security services. CISO Tribune files both under Security consulting and advisory. 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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  • Leidos
  • Quorum Cyber
Leidos vs Quorum Cyber: Products, Customers and Funding Compared
LeidosLeidos is a technology company that serves government and commercial customers with digital and mission innovations, with AI, cyber and mission software at its core.leidos.comQuorum CyberQuorum Cyber delivers Microsoft-first, threat-led cyber security services.quorumcyber.com
What it sells
  • Parcata[1]A tool that discovers, validates and prioritizes software vulnerabilities across mission-critical systems to focus remediation efforts.
  • UpHold[1]A platform that combines proactive defense and AI-driven analytics to reduce cyber risk and help security teams prioritize and respond to alerts.
  • Cyber and Electromagnetic Activities Resiliency System (CRS)[1]A system that provides real-time detection and AI-enabled analytics to give earlier warning of threats to tactical systems.
  • 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.
Categories
Headquarters
Reston, Virginia, United States[2][12]Edinburgh, United Kingdom[1]
Founded
Not stated on its pagesNot stated on its pages
Ownership and funding
Public (NYSE: LDOS)[2][8][11][13][17][20]Not stated on its pages
Named customers
Not stated on its pagesNot stated on its pages
Recent news
  • October 2, 2026Leidos has a new joint venture, operating under the Analogic brand, that combines security screening technologies, engineering expertise and advanced manufacturing capabilities.[10]
  • September 29, 2026Leidos introduced a capability that uses AI agents to help security operations center teams identify threats needing immediate action.[9]
  • March 30, 2026Leidos completed its acquisition of ENTRUST Solutions Group from Kohlberg for approximately $2.4 billion.[20]
  • March 30, 2026Leidos added ENTRUST through an acquisition, gaining more than 3,100 professionals in electric grid engineering and natural gas infrastructure.[8]
  • March 10, 2026Leidos announced a partnership with Dropzone AI to help U.S. federal agencies respond to cyber threats, and made a strategic investment in Dropzone AI.[21]
  • September 16, 2026Quorum Cyber announced that it has signed a definitive agreement to acquire Ontinue, a managed extended detection and response provider.[12]
G2 and Gartner Peer Insights
  • G2: listed, seen November 5, 2026[11]
  • 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
From its own pages, Leidos sells mainly to government and commercial customers. Leidos names the defense, intelligence, civil and health markets. Leidos Australia has partnered with government, defence and national security customers. Leidos provides engineering services for commercial electric utilities. Leidos describes DISN services delivered to the Department of War (DoW) and national security organizations worldwide.Not written yet
Last verified
October 12, 2026October 7, 2026

Where they overlap

  • Leidos and Quorum Cyber are both filed under Security consulting and advisory.

Where they differ, field by field

  • Leidos's primary category is Security consulting and advisory; Quorum Cyber's is MDR and managed SOC.
  • Leidos is also filed under Vulnerability management, AI SOC analysts and Managed security service providers. Quorum Cyber is also filed under Incident response and forensics and OT and ICS security.
  • Leidos lists Parcata, UpHold and Cyber and Electromagnetic Activities Resiliency System (CRS). Quorum Cyber lists Clarity Defend, Clarity Extend, Clarity Protect, Clarity Data & AI, Clarity OT and 1 more.
  • Leidos is headquartered in Reston, Virginia, United States. Quorum Cyber is headquartered in Edinburgh, United Kingdom.
  • Leidos is a public company listed on NYSE as LDOS.

Questions about Leidos and Quorum Cyber

What do Leidos and Quorum Cyber sell?
Leidos sells Parcata, UpHold and Cyber and Electromagnetic Activities Resiliency System (CRS). Quorum Cyber sells Clarity Defend, Clarity Extend, Clarity Protect, Clarity Data & AI, Clarity OT and 1 more.
Are Leidos and Quorum Cyber in the same category?
They share Security consulting and advisory. Leidos's primary category is Security consulting and advisory and Quorum Cyber's is MDR and managed SOC.
Where are Leidos and Quorum Cyber headquartered?
Leidos is headquartered in Reston, Virginia, United States. Quorum Cyber is headquartered in Edinburgh, United Kingdom.
Who owns Leidos and Quorum Cyber?
Leidos is a public company listed on NYSE as LDOS.
Who are Leidos and Quorum Cyber sold to?
From its own pages, Leidos sells mainly to government and commercial customers.
What have Leidos and Quorum Cyber announced recently?
October 2, 2026: Leidos has a new joint venture, operating under the Analogic brand, that combines security screening technologies, engineering expertise and advanced manufacturing capabilities. September 16, 2026: Quorum Cyber announced that it has signed a definitive agreement to acquire Ontinue, a managed extended detection and response provider.

About Leidos

Leidos is a technology company that serves government and commercial customers with digital and mission innovations, with AI, cyber and mission software at its core. Leidos says its solutions are engineered for rapid deployment, scalable performance and consistent results. Leidos works across the defense, intelligence, civil and health markets.[14]

Leidos says its cyber operations work is AI-enabled and adapts to evolving threats, accelerates decisions and strengthens mission resilience. Leidos describes secure, scalable software that delivers new capabilities faster and adapts as missions evolve. Leidos describes proving what works and scaling it fast, from missiles and sensors to maritime autonomy. Leidos describes AI-enabled health solutions that strengthen access and outcomes.[15]

Leidos says one of its sectors delivers performance-based IT services and repeatable solutions. Leidos says its digital engineering approach to IT transformation applies cloud-factory and aaS (as a Service) capabilities and integrates commercial products.[16]

Leidos is headquartered in Reston, Virginia, with approximately 50,000 global employees. Leidos reported annual revenues of approximately $17.2 billion for the fiscal year ended January 2, 2026. Leidos trades on the NYSE under the symbol LDOS. Engineering and technology for secure energy infrastructure is a strategic focus for Leidos under its NorthStar 2030 growth strategy.

More than 1,400 Leidos employees contribute in the UK and Europe, a region Leidos says plays a central role in its future growth strategy. Leidos Australia designs, builds, operates and supports systems, services and capabilities that help protect and advance the Australian way of life. Leidos Israel partners with the local technology eco-system to develop in-country talent. Leidos says it relies on enduring partnerships to provide practical answers to some of the Gulf region's most complex challenges. Leidos Canada provides a wide range of technology services to government agencies and private enterprise.[3][18]

The C5ISR Center Cyber Security Service Provider (CSSP) is a defensive cyber operations organization supporting the Department of War (DoW). DISA delivers Defense Information Systems Network (DISN) services to the Department of War (DoW) and national security organizations worldwide. Leidos operates a geographically dispersed team of more than 240 professionals providing 24x7x365 support for DISN services. Leidos says that team works to ensure the availability, reliability and operational resilience of DISN services through proactive network monitoring, incident management, service restoration and infrastructure sustainment.[5][14][19]

Leidos has signed a definitive agreement to acquire ENTRUST Solutions Group from Kohlberg for approximately $2.4 billion. Leidos says the acquisition brings it into the utility gas and electric generation infrastructure markets and would double the size of its $600 million energy infrastructure engineering business. Leidos expects the transaction to close by the end of the second quarter of 2026. Leidos has provided engineering services for commercial electric utilities, focused on transmission and distribution, for more than two decades. ENTRUST Solutions Group has 3,100+ professionals across 40+ locations in North America providing engineering, consulting, design, asset integrity, data solutions and automation services to utilities, operators and industrial customers.

Leidos operates the Saxton Transportation Operations Laboratory (STOL), a USDOT research lab focused on improving transportation operations, safety, mobility and environmental impacts. Leidos has a customer service team that supports the US Department of Housing and Urban Development (HUD), Office of Single-Family Housing.[1][3][4][5][6][7][18][19]

Leidos on the record

Sources

Leidos full record

  1. [1]CyberLeidos · leidos.com · undated page, accessed October 12, 2026 · Tier A
  2. [2]Leidos delivers strong second quarter and enhances full yearPRNewswire · investors.leidos.com · published August 4, 2026 · Tier A
  3. [3]Platform Engineer in Australia (No Remote)Leidos · undated page, accessed November 1, 2026 · Tier A
  4. [4]Azure Cloud Security Engineeer in Adelphi, Maryland (Hybrid Remote)Leidos · undated page, accessed November 1, 2026 · Tier A
  5. [5]Senior AI Platform Engineer in Adelphi, Maryland (Remote)Leidos · undated page, accessed November 1, 2026 · Tier A
  6. [6]Production Technician in Australia (No Remote)Leidos · undated page, accessed November 1, 2026 · Tier A
  7. [7]Transportation Data Scientist (AI Solutions) in McLean, Virginia (No Remote)Leidos · undated page, accessed November 1, 2026 · Tier A
  8. [8]Leidos completes $2.4 billion acquisition of ENTRUSTLeidos · published March 30, 2026 · Tier A
  9. [9]Leidos launches agentic AI platform to speed response to cyber threatsLeidos · published September 29, 2026 · Tier A
  10. [10]Leidos Security Enterprise Solutions and Analogic close deal to strengthen global security screening capabilitiesLeidos · published October 2, 2026 · Tier A
  11. [11]Leidos Reviews 2026: Details, Pricing, & Features | G2G2 · undated page, accessed November 1, 2026 · Tier C
  12. [12]Customer Service Representative in Indianapolis, Indiana (No Remote)Leidos · undated page, accessed November 5, 2026 · Tier A
  13. [13]Global | LeidosLeidos · undated page, accessed November 5, 2026 · Tier A
  14. [14]Deputy Operations Service Delivery Manager (SDM) in Scott Air Force Base, Illinois (No Remote)Leidos · undated page, accessed November 5, 2026 · Tier A
  15. [15]Leidos. Outsmart. Outdo.Leidos · undated page, accessed November 5, 2026 · Tier A
  16. [16]Tier 1 Customer Service Representative in Remote, US (Remote)Leidos · undated page, accessed November 5, 2026 · Tier A
  17. [17]Leidos to acquire power design firm ENTRUST, bolstering its energy infrastructure portfolio | LeidosLeidos · published January 26, 2026 · Tier A
  18. [18]Platform Engineer in Australia (Hybrid Remote)Leidos · undated page, accessed November 5, 2026 · Tier A
  19. [19]Cybersecurity Project Manager in Adelphi, Maryland (Hybrid Remote)Leidos · undated page, accessed November 5, 2026 · Tier A
  20. [20]Leidos completes $2.4 billion acquisition of ENTRUSTPR Newswire · published March 30, 2026 · Tier A
  21. [21]Leidos, Dropzone AI to accelerate federal agencies' cyber responsesLeidos · published March 10, 2026 · Tier A

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

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