CISO Tribune

Vendor comparison · 2 companies

Expel vs Stellar Cyber

Expel sells managed detection and response (MDR) delivered through its Workbench platform, with 24x7 human analysts working in the security tools a customer already has. Stellar Cyber sells a SecOps platform that uses AI for threat detection and response through unified NG-SIEM, NDR, and Open XDR capabilities. 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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  • Expel
  • Stellar Cyber
Expel vs Stellar Cyber: Products, Customers and Funding Compared
ExpelExpel sells managed detection and response (MDR) delivered through its Workbench platform, with 24x7 human analysts working in the security tools a customer already has.expel.comStellar CyberStellar Cyber sells a SecOps platform that uses AI for threat detection and response through unified NG-SIEM, NDR, and Open XDR capabilities.stellarcyber.ai
What it sells
  • Expel MDR[5][7]A managed detection and response service that works with the security tools a customer already has.
  • Ruxie[3][5]Expel's AI and automation engine used in its MDR service.
  • Stellar Cyber Open XDR PlatformA SecOps platform that unifies SIEM, network detection and response, identity threat detection and response, and behavior analytics with AI-driven detection, investigation and response.
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 pagesPrivately held[3][4]
Named customers
Not stated on its pagesNot stated on its pages
Recent news
Not stated on its pages
  • October 5, 2026Stellar Cyber announced version 7.0 of its security operations platform, adding AI case triage, case metrics and expanded automated response.[16]
G2 and Gartner Peer Insights
  • G2: listed, seen November 3, 2026[4]
  • 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 yetStellar Cyber describes its open SecOps platform as built for lean security teams and MSSPs. Stellar Cyber designs its enterprise platform for security teams of any size or skill level. Stellar Cyber Open XDR can be deployed on-premises, from the cloud, or co-managed by an MSSP.
Last verified
September 27, 2026November 9, 2026

Where they overlap

  • Expel and Stellar Cyber are both filed under MDR and managed SOC.

Where they differ, field by field

  • Expel's primary category is MDR and managed SOC; Stellar Cyber's is SIEM.
  • Stellar Cyber is also filed under AI SOC analysts.
  • Expel lists Expel MDR and Ruxie. Stellar Cyber lists Stellar Cyber Open XDR Platform.
  • Stellar Cyber is privately held.

What it sells: Expel

What Expel MDR does[5][7]
Expel MDR provides 24x7 SOC monitoring, with analysts who investigate and respond. Expel says it connects to an existing stack and correlates threats across endpoint, identity, cloud, network, SaaS and more. Expel states a 14-minute mean time to remediate.
What Ruxie does[3][5]
Expel says Ruxie gathers evidence, enriches alerts and matches patterns in seconds. Expel analysts then investigate and make the critical calls.

Questions about Expel and Stellar Cyber

What do Expel and Stellar Cyber sell?
Expel sells Expel MDR and Ruxie. Stellar Cyber sells Stellar Cyber Open XDR Platform.
Are Expel and Stellar Cyber in the same category?
They share MDR and managed SOC. Expel's primary category is MDR and managed SOC and Stellar Cyber's is SIEM.
Who owns Expel and Stellar Cyber?
Stellar Cyber is privately held.
Who are Expel and Stellar Cyber sold to?
Stellar Cyber describes its open SecOps platform as built for lean security teams and MSSPs.
What have Expel and Stellar Cyber announced recently?
October 5, 2026: Stellar Cyber announced version 7.0 of its security operations platform, adding AI case triage, case metrics and expanded automated response.

About Expel

Expel sells managed detection and response (MDR) delivered through its Workbench platform, with 24x7 human analysts working in the security tools a customer already has. Expel says its service is built so that technology makes it fast and humans make it accurate.[5]

Expel describes the service as managed detection and response with analysts who can be reached directly over Slack or Teams. Expel says customers connect Workbench to their existing stack, and Expel then correlates threats across endpoint, identity, cloud, network, SaaS and more. Expel says no agents need to be deployed and no rip-and-replace is required.[5]

Ruxie is the name Expel gives its AI and automation engine. Expel says Ruxie gathers evidence, enriches alerts and matches patterns so that Expel analysts can investigate and make the critical calls. Expel states a 14-minute mean time to remediate for its MDR service.[5]

Expel Workbench is the platform through which customers see Expel's work. Expel says customers can see every investigation and response in real time inside Workbench.[5]

Expel says its MDR covers cloud, endpoint, identity, network, SaaS, email and more, across more than 160 technology integrations. Expel names Microsoft, AWS, Google Cloud, CrowdStrike, Okta and Wiz among those integrations.[5][10]

Expel also offers email threat detection and response, in which Expel says it monitors the email environment 24x7. Expel says this works alongside Proofpoint, Mimecast, Abnormal Security and Sublime. Expel also describes MDR coverage of the AI attack surface, covering attacker use of AI, employee misuse of AI tools and attacks on customer-built AI systems, with detections mapped to MITRE ATLAS.[6][7]

Expel was started by practitioners. Dave Merkel is co-founder and Chief Executive Officer, Justin Bajko is a co-founder and Chief Strategy Officer, and Yanek Korff is a co-founder and Chief Operating Officer. Greg Notch is Chief Technology Officer.[8]

2. Expel says Workbench infrastructure runs on GCP and AWS in the U.S, and that alert data is retained up to 15 months, configurable per contract.[1][2][5][9]

Expel on the record

Sources

Expel full record

  1. [1]Workbench operations platformExpel · expel.com · published August 5, 2026 · Tier A
  2. [2]Expel announces 20 million in series b fundingExpel · expel.com · undated page, accessed September 27, 2026 · Tier A
  3. [3]Leading managed detection and response (MDR) provider | ExpelExpel · undated page, accessed October 24, 2026 · Tier A
  4. [4]Expel Reviews 2026: Details, Pricing, & Features - G2G2 · undated page, accessed October 24, 2026 · Tier C
  5. [5]Managed Detection and Response Services | Expel MDRExpel · undated page, accessed November 3, 2026 · Tier A
  6. [6]Email threat detection | ExpelExpel · undated page, accessed November 3, 2026 · Tier A
  7. [7]AI attack surface coverage | ExpelExpel · undated page, accessed November 3, 2026 · Tier A
  8. [8]Company | ExpelExpel · undated page, accessed November 3, 2026 · Tier A
  9. [9]Security and compliance support from your MDR | ExpelExpel · undated page, accessed November 3, 2026 · Tier A
  10. [10]Managed Security Solutions | ExpelExpel · undated page, accessed November 3, 2026 · Tier A

Stellar Cyber full record

  1. [1]ProductStellar Cyber · stellarcyber.ai · published February 25, 2026 · Tier A
  2. [2]Stellar cyber announces agentic ai autonomous soc in 6 4 0 releaseStellar Cyber · stellarcyber.ai · published March 16, 2026 · Tier A
  3. [3]Stellar cyber named one of americas best startup employersStellar Cyber · stellarcyber.ai · published November 21, 2024 · Tier A
  4. [4]ISOC Platform with AI SIEM, NDR, Open XDR & Multi-Layer AIStellar Cyber · undated page, accessed October 29, 2026 · Tier A
  5. [5]Stellar Cyber Automation-driven SecOps PlatformStellar Cyber · undated page, accessed November 10, 2026 · Tier A
  6. [6]Stellar Cyber vs Sumo Logic: Expert SIEM Solution ComparisonStellar Cyber · undated page, accessed November 10, 2026 · Tier A
  7. [7]Stellar Cyber vs Splunk: In-Depth SIEM Solution ComparisonStellar Cyber · undated page, accessed November 10, 2026 · Tier A
  8. [8]Integrated Security Operations Center (ISOC) PlatformStellar Cyber · undated page, accessed November 10, 2026 · Tier A
  9. [9]SC vs Microsoft Sentinel: Comprehensive SIEM SolutionStellar Cyber · undated page, accessed November 10, 2026 · Tier A
  10. [10]SC vs. CrowdStrike | Compare Leading Cybersecurity PlatformsStellar Cyber · undated page, accessed November 10, 2026 · Tier A
  11. [11]EDR Software, Endpoint Detection & ResponseStellar Cyber · undated page, accessed November 10, 2026 · Tier A
  12. [12]Stellar Cyber Autonomous SOC PlatformStellar Cyber · undated page, accessed November 10, 2026 · Tier A
  13. [13]Stellar Cyber Multi-Layer AI™ | Advanced AI Platform for SecOpsStellar Cyber · undated page, accessed November 10, 2026 · Tier A
  14. [14]Stellar Cyber AI SIEM | AI-Driven SIEM PlatformStellar Cyber · undated page, accessed November 10, 2026 · Tier A
  15. [15]Stellar Cyber vs AlienVault: In-Depth SIEM Solution ComparisonStellar Cyber · undated page, accessed November 10, 2026 · Tier A
  16. [16]Stellar Cyber 7.0 Makes the Agentic SOC Measurable, Actionable and Operational at ScaleStellar Cyber · published October 5, 2026 · Tier A

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