CISO Tribune

Vendor comparison · 2 companies

Rival Security vs Stellar Cyber

Rival Security sells the Agent Harness, a platform that gives customers the capabilities and context to run security agents. 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 AI SOC analysts. 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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  • Rival Security
  • Stellar Cyber
Rival Security vs Stellar Cyber: Products, Customers and Funding Compared
Rival SecurityRival Security sells the Agent Harness, a platform that gives customers the capabilities and context to run security agents.rival.securityStellar 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
  • Agent Harness[2][3]A platform for running security agents with the context of a customer's cloud, code and scanners.
  • 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: 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
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
November 5, 2026November 9, 2026

Where they overlap

  • Rival Security and Stellar Cyber are both filed under AI SOC analysts.

Where they differ, field by field

  • Rival Security's primary category is Exposure prioritisation and CTEM; Stellar Cyber's is SIEM.
  • Rival Security is also filed under Vulnerability management. Stellar Cyber is also filed under MDR and managed SOC.
  • Rival Security lists Agent Harness. Stellar Cyber lists Stellar Cyber Open XDR Platform.
  • Stellar Cyber is privately held.

What it sells: Rival Security

What Agent Harness does[2][3]
Every agent runs on Rival's Agent Harness. Agent Harness reads the context of a customer's cloud, code and scanners and hands the work to specialist subagents.

Questions about Rival Security and Stellar Cyber

What do Rival Security and Stellar Cyber sell?
Rival Security sells Agent Harness. Stellar Cyber sells Stellar Cyber Open XDR Platform.
Are Rival Security and Stellar Cyber in the same category?
They share AI SOC analysts. Rival Security's primary category is Exposure prioritisation and CTEM and Stellar Cyber's is SIEM.
Who owns Rival Security and Stellar Cyber?
Stellar Cyber is privately held.
Who are Rival Security and Stellar Cyber sold to?
Stellar Cyber describes its open SecOps platform as built for lean security teams and MSSPs.
What have Rival Security 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 Rival Security

Rival Security sells the Agent Harness, a platform that gives customers the capabilities and context to run security agents. Rival Security describes its purpose as automating workflows, investigating vulnerabilities, tracking down owners and remediating. Rival Security says more agents are ready to slot into a security program, and that customers can mix, match and run them alongside their team.[3]

Rival Security states that AI turns a CVE into a working exploit in hours.[3]

Every agent runs on Rival's Agent Harness. Agent Harness reads the context of a customer's cloud, code and scanners. Agent Harness hands the work to specialist subagents.[3]

Rival provides agents that customers can customize and extend. Rival engineers build custom agents for a customer's environment and stack at no additional cost. Customers can also build their own agents using Rival's capabilities to accelerate a workflow.[3]

Rival offers built-in agents for starting a workflow. One workflow cuts scanner noise down to what is exploitable.[1][3]

Rival Security on the record

Sources

Rival Security full record

  1. [1]TermsRival Security · rival.security · published July 1, 2026 · Tier A
  2. [2]rival.securityRival Security · rival.security · undated page, accessed November 5, 2026 · Tier A
  3. [3]Rival Security: The agent harness for cybersecurityRival Security · undated page, accessed November 10, 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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