What do Quorum Cyber and Tenfold Security sell?

Quorum Cyber sells Clarity Defend, Clarity Extend, Clarity Protect, Clarity Data & AI, Clarity OT and 1 more. Tenfold Security sells Real-Time Risk Assessment.

Are Quorum Cyber and Tenfold Security in the same category?

Yes. MDR and managed SOC is the primary category of both on CISO Tribune.

What have Quorum Cyber and Tenfold Security 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.

Vendor comparison · 2 companies

Quorum Cyber vs Tenfold Security

Quorum Cyber delivers Microsoft-first, threat-led cyber security services. Tenfold Security provides Active Penetration Testing, Real-Time Risk Assessment, Managed SIEM and CrowdStrike services. CISO Tribune files both under MDR and managed SOC and 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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Quorum Cyber
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Quorum Cyber vs Tenfold Security: Products, Customers and Funding Compared
What it sells
	Quorum CyberQuorum Cyber delivers Microsoft-first, threat-led cyber security services.quorumcyber.com	Tenfold SecurityTenfold Security provides Active Penetration Testing, Real-Time Risk Assessment, Managed SIEM and CrowdStrike services.tenfoldsecurity.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.	Real-Time Risk Assessment^[3]Automates compliance with standards such as HIPAA, PCI and SOX.
Categories
Categories	MDR and managed SOC (primary category) Incident response and forensics Security consulting and advisory OT and ICS security	MDR and managed SOC (primary category) Penetration testing and red team services SIEM Security consulting and advisory
Headquarters
Headquarters	Edinburgh, United Kingdom^[1]	Not stated on its pages
Founded
Founded	Not stated on its pages	Not stated on its pages
Ownership and funding
Ownership and funding	Not stated on its pages	Not stated on its pages
Named customers
Named customers	Not stated on its pages	Not stated on its pages
Recent news
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 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
Who it fits	Not written yet	Not written yet
Last verified
Last verified	October 7, 2026	October 21, 2026

Where they overlap

MDR and managed SOC is the primary category of both Quorum Cyber and Tenfold Security; both are also filed under Security consulting and advisory.

Where they differ, field by field

Quorum Cyber is also filed under Incident response and forensics and OT and ICS security. Tenfold Security is also filed under Penetration testing and red team services and SIEM.
Quorum Cyber lists Clarity Defend, Clarity Extend, Clarity Protect, Clarity Data & AI, Clarity OT and 1 more. Tenfold Security lists Real-Time Risk Assessment.
Quorum Cyber is headquartered in Edinburgh, United Kingdom.

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 Tenfold Security under MDR and managed SOC, Penetration testing and red team services, SIEM, and Security consulting and advisory, also with MDR and managed SOC as its primary category. The shared primary category is where the two overlap most clearly.

Quorum Cyber sells Clarity Defend, Clarity Extend, Clarity Protect, Clarity Data & AI and Clarity OT, plus Incident Response Services. Its work centers on the Microsoft security stack, and it is a Microsoft Solutions Partner for Security. Tenfold Security provides Active Penetration Testing, Real-Time Risk Assessment, Managed SIEM and CrowdStrike services. Its Managed SIEM is cloud-native and includes two years of secure log storage, and its CrowdStrike services include a dedicated SOC. Penetration testing and a SIEM service appear in Tenfold Security's filing, while OT security appears in Quorum Cyber's.

Quorum Cyber is headquartered in Edinburgh, United Kingdom, and has over 350 employees across the UK, US, Canada and UAE. It states that it protects 400+ organisations across four continents. On September 16, 2026, Quorum Cyber announced a definitive agreement to acquire Ontinue, a managed extended detection and response provider. Tenfold Security names a mid-size public university in the Midwest as a client, where it deployed Sentinel One and Velociraptor during a ransomware response.

What it sells: Tenfold Security

What Real-Time Risk Assessment does^[3]: Tenfold Security's Real-Time Risk Assessment automates compliance with standards such as HIPAA, PCI and SOX. Continuous monitoring provides instant updates and alerts.

Questions about Quorum Cyber and Tenfold Security

What do Quorum Cyber and Tenfold Security sell?: Quorum Cyber sells Clarity Defend, Clarity Extend, Clarity Protect, Clarity Data & AI, Clarity OT and 1 more. Tenfold Security sells Real-Time Risk Assessment.
Are Quorum Cyber and Tenfold Security in the same category?: Yes. MDR and managed SOC is the primary category of both on CISO Tribune.
Where are Quorum Cyber and Tenfold Security headquartered?: Quorum Cyber is headquartered in Edinburgh, United Kingdom.
What have Quorum Cyber and Tenfold Security 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

About Tenfold Security

Tenfold Security provides Active Penetration Testing, Real-Time Risk Assessment, Managed SIEM and CrowdStrike services. Tenfold Security works with organizations on cybersecurity challenges that range from ransomware attacks and security gaps to ongoing risk management. The Tenfold team is made up of security professionals and security-minded business professionals who want to provide a service that protects the vulnerable, in business and community.^[1][3][4][5]

Aaron Weissenfluh is passionate about securing SMBs with practical security solutions. Aaron Weissenfluh, COO of Tenfold Security, has served as a CISO for a major stock exchange.^[6]

Tenfold Security's Active Penetration Testing Services simulate real-world attacks to test a customer's detection and response capabilities. Tenfold Security's Active Penetration Testing identifies and rates vulnerabilities and provides real-time mitigation. Tenfold Security's Active Penetration Testing includes continuous monitoring and analyses.^[3]

Tenfold Security's Real-Time Risk Assessment automates compliance with standards such as HIPAA, PCI and SOX.^[3]

Tenfold Security's Managed SIEM gives 24/7 visibility into what is happening across a customer's systems and applications. Tenfold Security's Managed SIEM collects and monitors security logs in real time and alerts the Tenfold Security team to suspicious activity before it becomes a business-impacting incident. Tenfold Security's Managed SIEM is a cloud-native solution that integrates with existing tools. Tenfold Security's Managed SIEM supports compliance requirements and includes two years of secure log storage.^[3]

Tenfold Security's CrowdStrike services deliver cloud-native endpoint protection, AI-powered detection and continuous monitoring. Tenfold Security's CrowdStrike services include a dedicated SOC that provides around-the-clock visibility. Tenfold Security's CrowdStrike services include access to the full CrowdStrike product suite.^[1][3]

A mid-size public university in the Midwest, serving thousands of students across multiple campuses, was a Tenfold Security client. Tenfold Security was engaged on the day of the university's full network failure. The response to the university's ransomware attack used a parallel workstream model in which different response teams worked simultaneously on network analysis, device triage, forensics and communication. Tenfold Security deployed Sentinel One and Velociraptor across all university devices. Tenfold Security used Sentinel One for real-time endpoint detection and response and Velociraptor for rapid forensic collection and hunting for persistence mechanisms. Tenfold Security's response included identifying and closing the open RDP port and auditing all vendor access paths. Tenfold Security's response included disabling compromised accounts and resetting all credentials with enforced MFA. Tenfold Security's response included assessing which data was recoverable and which was lost through the vendor breach. Tenfold Security's response included coordinating with cyber insurance to document the incident and manage communications. Tenfold Security's response included establishing an internal communication protocol to stop the spread of misinformation. Tenfold Security built the response around the university's infrastructure, vendor relationships and operational priorities. Five days after engagement, all devices were clean and the network was fully restored.

The university now operates with continuous managed detection and response, vendor management and tested incident response procedures.

Tenfold Security on the record

Sources

Quorum Cyber full record

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

Tenfold Security full record

[1]Empowering Businesses with Enterprise-Grade Cybersecurity | About Tenfold SecurityTenfold Security · undated page, accessed October 21, 2026 · Tier A
[2]tenfoldsecurity.comTenfold Security · tenfoldsecurity.com · undated page, accessed October 21, 2026 · Tier A
[3]Our Services | Tenfold SecurityTenfold Security · undated page, accessed November 10, 2026 · Tier A
[4]Case StudyTenfold Security · undated page, accessed November 10, 2026 · Tier A
[5]Enterprise-Grade Security Solutions for Small & Midsize Businesses | Tenfold SecurityTenfold Security · undated page, accessed November 10, 2026 · Tier A
[6]The CEO of Cybersecurity (And Why Most Companies Still Get It Wrong)Tenfold Security · undated page, accessed November 10, 2026 · Tier A
[7]Case Study: University Recovery in 5 Days | Tenfold SecurityTenfold Security · published July 23, 2026 · Tier A

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