CISO Tribune

Vendor comparison · 2 companies

Hold Security, LLC vs Quorum Cyber

Hold Security, LLC is an Information Security, Threat Intelligence, Penetration Testing, Risk Management and Incident Response company, helping businesses of all sizes stay secure. Quorum Cyber delivers Microsoft-first, threat-led cyber security services. CISO Tribune files both under Incident response and forensics. 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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  • Hold Security, LLC
  • Quorum Cyber
Hold Security, LLC vs Quorum Cyber: Products, Customers and Funding Compared
Hold Security, LLCHold Security, LLC is an Information Security, Threat Intelligence, Penetration Testing, Risk Management and Incident Response company, helping businesses of all sizes stay secure.holdsecurity.comQuorum CyberQuorum Cyber delivers Microsoft-first, threat-led cyber security services.quorumcyber.com
What it sells
  • Threat Intelligence Services[1][4][6]Indexes and correlates public and private resources on the Dark Web and Internet to identify malicious and threatening events.
  • Domain Integrity Service[2][4]Provides monitoring and alerting of domain names.
  • 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
Not stated on its pagesEdinburgh, United Kingdom[1]
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
Not stated on its pages
  • 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: 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
From its own pages, Hold Security sells mainly to companies of all sizes. Hold Security designs its Threat Intelligence Services to assist organizations in monitoring the Dark Web. Companies that develop their own software, or want to verify that vendor software contains no undiscovered vulnerabilities, are among those Hold Security says it can help. Hold Security also directs its incident response work at companies that encounter ransomware, APTs, Nation State targeting or suspected cyber fraud or theft. Organizations that want to verify organizational controls around regulatory levels, human resources and data classification are another group Hold Security addresses.Not written yet
Last verified
October 30, 2026October 7, 2026

Where they overlap

  • Hold Security, LLC and Quorum Cyber are both filed under Incident response and forensics.

Where they differ, field by field

  • Hold Security, LLC's primary category is Threat intelligence; Quorum Cyber's is MDR and managed SOC.
  • Hold Security, LLC is also filed under Digital risk protection and Penetration testing and red team services. Quorum Cyber is also filed under Security consulting and advisory and OT and ICS security.
  • Hold Security, LLC lists Threat Intelligence Services and Domain Integrity Service. Quorum Cyber lists Clarity Defend, Clarity Extend, Clarity Protect, Clarity Data & AI, Clarity OT and 1 more.
  • Quorum Cyber is headquartered in Edinburgh, United Kingdom.

What it sells: Hold Security, LLC

What Domain Integrity Service does[2][4]
Hold Security's Domain Integrity Service provides monitoring and alerting of domain names. Domain Integrity Service offers portal access or customized reports created by Hold Security analysts.

Questions about Hold Security, LLC and Quorum Cyber

What do Hold Security, LLC and Quorum Cyber sell?
Hold Security, LLC sells Threat Intelligence Services and Domain Integrity Service. Quorum Cyber sells Clarity Defend, Clarity Extend, Clarity Protect, Clarity Data & AI, Clarity OT and 1 more.
Are Hold Security, LLC and Quorum Cyber in the same category?
They share Incident response and forensics. Hold Security, LLC's primary category is Threat intelligence and Quorum Cyber's is MDR and managed SOC.
Where are Hold Security, LLC and Quorum Cyber headquartered?
Quorum Cyber is headquartered in Edinburgh, United Kingdom.
Who are Hold Security, LLC and Quorum Cyber sold to?
From its own pages, Hold Security sells mainly to companies of all sizes.
What have Hold Security, LLC and Quorum 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 Hold Security, LLC

Hold Security, LLC is an Information Security, Threat Intelligence, Penetration Testing, Risk Management and Incident Response company, helping businesses of all sizes stay secure. Hold Security works with companies around the world to enhance their security posture. Alex Holden worked for over 10 years as the Chief Information Security Officer for a large brokerage firm in the United States before joining the consulting world. Hold Security engineers play lead roles in investigations of major security breaches.[3]

Hold Security indexes and correlates public and private/confidential resources on the Dark Web and Internet to identify malicious and threatening events. Hold Security Threat Intelligence Analysts examine threat data and interpret it to eliminate false positives. Hold Security designs its Threat Intelligence Services to assist organizations in monitoring the Dark Web. Hold Security has profiled thousands of actors. Most data gathering and processing at Hold Security is conducted by native speakers of English, Russian, Ukrainian, Spanish, Portuguese, and Mandarin.[1][3]

Hold Security's Domain Integrity Service provides monitoring and alerting of domain names. Domain Integrity Service offers portal access or customized reports created by Hold Security analysts.[2]

Hold Security conducts assessments of infrastructure and software through its Information Security Assessment Services to identify critical vulnerabilities. Hold Security offers services that include Penetration Testing, Red Team, and Vulnerability Assessment. Hold Security conducts all of its assessments in accordance with industry regulations and customer requirements. Hold Security compares test results to industry security standards and continuously measures improvements over time.[2][5][6]

Hold Security testing methodologies require engineers to conduct in-depth manual reviews of test results and their own battery of tests. Hold Security never relies on automated scanning tools as a sole way for assessments. Hold Security uses its Threat Intelligence Services to obtain the latest tools and techniques employed by cyber criminals. Hold Security's Black Box assessment technique simulates real-life situations where electronic assets are tested for vulnerabilities and subversions using the most basic sets of information available. Hold Security's Grey Box assessment technique scans with as much knowledge about the systems as the customer is willing to share. Hold Security offers a White Box assessment to audit or test systems, performed from the system administrator level with access to all necessary resources.[6]

Hold Security conducts tests including regression testing, debug analysis and code review to test all inputs and outputs of software for vulnerabilities. Hold Security's services include examinations of patch levels across customer software and libraries. Hold Security provides specialized Red Teams focused on offense and Purple Teams that unite offense and defense. Hold Security can help customers verify that organizational controls around security are effective on regulatory levels, human resources, and data classification. Hold Security engineers help customers identify data types and how data moves inside the enterprise within its partners and for its customers.[6]

Hold Security offers Incident Response Services to provide support and expertise in the event of cyber incidents. Hold Security helps companies that suspect cyber fraud or theft, face APTs or Nation State targeting, or encounter issues with ransomware. Hold Security works with companies of all sizes, including Fortune Global 500 organizations.[2][3][5][6]

Hold Security, LLC on the record

Sources

Hold Security, LLC full record

  1. [1]holdsecurity.comHold Security · holdsecurity.com · undated page, accessed October 30, 2026 · Tier A
  2. [2]SolutionsHold Security · holdsecurity.com · undated page, accessed October 30, 2026 · Tier A
  3. [3]About Us | Hold SecurityHold Security · undated page, accessed November 10, 2026 · Tier A
  4. [4]Hold Security - Information Security & Threat IntelligenceHold Security · undated page, accessed November 10, 2026 · Tier A
  5. [5]Solutions | Hold SecurityHold Security · undated page, accessed November 10, 2026 · Tier A
  6. [6]Information Security Assessment Services | Hold SecurityHold Security · undated page, accessed November 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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