CISO Tribune

Vendor comparison · 2 companies

Critical Start vs Proximus NXT

Critical Start sells managed detection and response (MDR) that combines AI-powered triage with human-led investigation. Proximus NXT offers business cybersecurity solutions tailored to an organisation's size and needs, from employee awareness training to advanced protection tools. 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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  • Critical Start
  • Proximus NXT
Critical Start vs Proximus NXT: Products, Customers and Funding Compared
Critical StartCritical Start sells managed detection and response (MDR) that combines AI-powered triage with human-led investigation.criticalstart.comProximus NXTProximus NXT offers business cybersecurity solutions tailored to an organisation's size and needs, from employee awareness training to advanced protection tools.proximus.be
What it sells
  • CORR Platform[4]The MDR platform that gives a security operations team visibility into every alert, investigation and response action.
  • Managed Detection and Response[3][10][11]MDR that combines AI-powered triage with human-led investigation.
  • Service Credits[7]A prepaid, flexible currency included in every managed service contract.
  • Vulnerability Management Services[3]Vulnerability management delivered under the same tier structure as MDR.
  • MobileSOC[12]A native iOS and Android application for real-time security operations management.
  • Secure Net[4][8]Protects fixed and/or mobile devices connected to the Proximus network from phishing attempts, viruses and malicious websites.
  • Smarter Online[4]A free platform that answers questions on phishing, suspicious messages and children's online safety, and checks whether a link or website is safe.
  • Internet Safe & Fun[4]Workshops, run in partnership with Child Focus, that help children navigate the digital world safely.
Categories
Headquarters
Not stated on its pagesNot stated on its pages
Founded
Not stated on its pagesNot stated on its pages
Ownership and funding
Not stated on its pagesPublic (Euronext Brussels: PROX)[2][6][9]
Named customers
Not stated on its pagesNot stated on its pages
Recent news
  • July 22, 2026Critical Start announced the appointment of Francine Geist as Chief Executive Officer, effective immediately.[9]
  • June 3, 2026Critical Start released SOC AI, a multi-agent framework that powers its AI-led managed detection and response service.[11]
  • June 2, 2026Critical Start released SOC AI, a multi-agent framework that powers its AI-led managed detection and response service.[10]
  • November 27, 2025Proximus NXT partners with Mistral AI to launch an AI offering aimed at the Benelux region and other European countries.[3]
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, Critical Start sells mainly to organizations that need accountability from a managed security provider, with contractual SLA commitments as the central offer. The company says it protects financial services firms, healthcare systems, manufacturers and utilities. For financial institutions, it describes ransomware, wire fraud and insider threats as the threats its MDR addresses. Its compliance reporting covers frameworks such as PCI DSS, HIPAA and NERC CIP, which points to regulated buyers. Critical Start MDR works with the customer's existing tools, so it suits teams that want to keep the security products they already run.For businesses, the company describes cybersecurity solutions tailored to an organisation's size and needs, from employee awareness training to protection tools. Self-employed people and those running a business are offered solutions designed for professional use. For families, the company sells mobile plans for kids.
Last verified
September 27, 2026October 14, 2026

Where they overlap

  • Critical Start and Proximus NXT are both filed under MDR and managed SOC.

Where they differ, field by field

  • Critical Start's primary category is MDR and managed SOC; Proximus NXT's is Managed security service providers.
  • Proximus NXT is also filed under SIEM and Security consulting and advisory.
  • Critical Start lists CORR Platform, Managed Detection and Response, Service Credits, Vulnerability Management Services and MobileSOC. Proximus NXT lists Secure Net, Smarter Online and Internet Safe & Fun.
  • Proximus NXT is a public company listed on Euronext Brussels as PROX.

What it sells: Critical Start

What CORR Platform does[4]
CORR connects to a security stack through native APIs, with no proprietary agents and no forced replacements. It works through API-based integrations, with no agents to deploy and no additional infrastructure to manage.
What Managed Detection and Response does[3][10][11]
Critical Start MDR combines AI-powered triage with human-led investigation and backs every response time with a contractual SLA. Analysts contain threats directly in the customer's tools through 30+ advanced integrations.
What Service Credits does[7]
Every managed service contract includes service credits that can be spent across 30+ services. MDR for Endpoint, MDR for SIEM and VMS each include credits. Credits stack into a single bank when a customer has more than one.

What it sells: Proximus NXT

What Secure Net does[4][8]
Secure Net protects devices connected to the Proximus network from phishing attempts, viruses and malicious websites. Secure Net Fix protects all devices connected to a fixed Proximus internet line, including smart devices. Secure Net Mobile protects devices using the Proximus 4G/5G mobile network only. Once the option is activated, devices are protected via the Proximus network and no software installation is required.
What Smarter Online does[4]
Smarter Online is a free platform that answers questions on phishing, suspicious messages and children's online safety. Smarter Online checks whether a link or website is safe before a click.

Questions about Critical Start and Proximus NXT

What do Critical Start and Proximus NXT sell?
Critical Start sells CORR Platform, Managed Detection and Response, Service Credits, Vulnerability Management Services and MobileSOC. Proximus NXT sells Secure Net, Smarter Online and Internet Safe & Fun.
Are Critical Start and Proximus NXT in the same category?
They share MDR and managed SOC. Critical Start's primary category is MDR and managed SOC and Proximus NXT's is Managed security service providers.
Who owns Critical Start and Proximus NXT?
Proximus NXT is a public company listed on Euronext Brussels as PROX.
Who are Critical Start and Proximus NXT sold to?
From its own pages, Critical Start sells mainly to organizations that need accountability from a managed security provider, with contractual SLA commitments as the central offer. For businesses, the company describes cybersecurity solutions tailored to an organisation's size and needs, from employee awareness training to protection tools.
What have Critical Start and Proximus NXT announced recently?
July 22, 2026: Critical Start announced the appointment of Francine Geist as Chief Executive Officer, effective immediately. November 27, 2025: Proximus NXT partners with Mistral AI to launch an AI offering aimed at the Benelux region and other European countries.

About Critical Start

Critical Start sells managed detection and response (MDR) that combines AI-powered triage with human-led investigation. The company says tools produce thousands of alerts every day, and that Critical Start MDR works to resolve every one and backs every response time with a contractual SLA.[2][6]

CORR is the MDR platform that Critical Start uses to give a security operations team visibility into every alert, every investigation and every response action. CORR connects to a security stack through native APIs, with no proprietary agents and no forced replacements. Critical Start says CORR connects to an existing stack through API-based integrations, with no agents to deploy, no network architecture changes and no additional infrastructure to manage.[1][4][5]

More than 30 of these are advanced integrations where Critical Start analysts contain threats directly in the customer's tools. Inside the platform, AI agents analyze enriched case data, including URL analysis, suggested verdicts and investigation summaries. A certified SOC analyst validates every finding, with two-person verification on critical alerts. The Trusted Behavior Registry uses deterministic behavioral validation to auto-resolve 99.83% of known-good behaviors before a human analyst sees them.[5]

Critical Start also offers MobileSOC, a native iOS and Android application for real-time security operations management. CORR supports compliance reporting for SOC 2, ISO 27001, PCI DSS, HIPAA, GLBA, CMMC and NERC CIP.

Every managed service follows an Essentials, Enterprise and Signature packaging model. That tier structure applies across MDR for Endpoint, MDR for SIEM and Vulnerability Management Services (VMS).

Every Critical Start managed service contract includes service credits, a prepaid, flexible currency that can be spent across 30+ services. Essentials includes 5 credits, Enterprise includes 10 credits and Signature includes 20 credits per subscription. MDR for Endpoint, MDR for SIEM and VMS each include credits, and credits stack into a single bank when a customer holds more than one.[7]

Critical Start says that in 2012 three security experts who had led incident response and threat hunting at Fortune 500 companies recognized a gap in the market. The company says it protects financial services firms, healthcare systems, manufacturers and utilities across 7 continents. For financial institutions, Critical Start delivers MDR with contractual SLAs and audit-grade investigation documentation.[4][5][6][8]

Critical Start on the record

Sources

Critical Start full record

  1. [1]PlatformCritical Start · criticalstart.com · undated page, accessed September 27, 2026 · Tier A
  2. [2]Critical Start | Managed Detection and Response (MDR)Critical Start · undated page, accessed October 24, 2026 · Tier A
  3. [3]Managed Security Services | Critical StartCritical Start · undated page, accessed October 24, 2026 · Tier A
  4. [4]Security Integrations | Critical StartCritical Start · undated page, accessed October 24, 2026 · Tier A
  5. [5]Security Solutions by Environment | Critical StartCritical Start · undated page, accessed October 24, 2026 · Tier A
  6. [6]About Critical Start | Cybersecurity CompanyCritical Start · undated page, accessed October 24, 2026 · Tier A
  7. [7]Service Credits: Flexible Security Currency | Critical StartCritical Start · undated page, accessed October 24, 2026 · Tier A
  8. [8]MDR for Finance: PCI, SOX, SOC 2 | Critical StartCritical Start · undated page, accessed October 24, 2026 · Tier A
  9. [9]Critical Start Appoints Francine Geist as Chief Executive OfficerCritical Start · published July 22, 2026 · Tier A
  10. [10]Critical Start Delivers SOC AI: A Production-Proven Agentic Architecture Built for Auditable, Human-Validated MDRBusiness Wire · published June 2, 2026 · Tier A
  11. [11]Critical Start expands MDR capabilities with multi-agent AI systemHelp Net Security · published June 3, 2026 · Tier B
  12. [12]CORR Platform: See Everything. Question Nothing. | Critical StartCritical Start · undated page, accessed November 5, 2026 · Tier A

Proximus NXT full record

  1. [1]Managed security servicesProximus · proximus.be · undated page, accessed October 14, 2026 · Tier A
  2. [2]CompanydataProximus · proximus.be · undated page, accessed October 14, 2026 · Tier A
  3. [3]Proximus NXT and Mistral AILHoFT · published November 27, 2025 · Tier B
  4. [4]Digital security for you and your familyProximus · undated page, accessed November 10, 2026 · Tier A
  5. [5]How to choose the right internet subscription?Proximus · undated page, accessed November 10, 2026 · Tier A
  6. [6]Proximus mobile plansProximus · undated page, accessed November 10, 2026 · Tier A
  7. [7]Welcome to Proximus – Internet, mobile, phone and TV | ProximusProximus · undated page, accessed November 10, 2026 · Tier A
  8. [8]Questions about Secure NetProximus · undated page, accessed November 10, 2026 · Tier A
  9. [9]Norton Security - Antivirus protectionProximus · undated page, accessed November 10, 2026 · Tier A

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