CISO Tribune

Vendor comparison · 2 companies

Realm Security vs Stellar Cyber

Realm Security sells a SOC-aware Security Data Pipeline Platform, abbreviated SDPP. 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 SIEM. 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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  • Realm Security
  • Stellar Cyber
Realm Security vs Stellar Cyber: Products, Customers and Funding Compared
Realm SecurityRealm Security sells a SOC-aware Security Data Pipeline Platform, abbreviated SDPP.realm.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
  • Realm Platform[1][2][3]A SOC-aware security data pipeline that connects any source and sends data to any destination.
  • Realm Clarity AI[1][5]Understands what each source produces and what each destination needs, then shapes the flow between them.
  • Detection Integrity[1][8]Proves that a data cut did not cost a detection.
  • Privacy Guard[1][8]Discovers and masks PII, PHI and PCI in transit.
  • 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
  • October 29, 2026Realm Security expanded its Realm Partner Program by adding Crush Security and ProCern Technology Solutions in North America.[11]
  • 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
Realm Security reports enterprise demand for vendor-neutral control over the telemetry feeding SIEMs, data lakes and AI agents in the security operations center. The company states that delivering value quickly for resource-constrained security defenders is at the core of its mission. Realm Security's partner program is aimed at resellers, MSSPs, technology advisors and cybersecurity consultancies. One partner type it names is an MSSP that integrates the Realm Platform into a fully managed data pipeline service.Stellar 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

  • Realm Security and Stellar Cyber are both filed under SIEM.

Where they differ, field by field

  • Realm Security's primary category is Security data lakes and pipelines; Stellar Cyber's is SIEM.
  • Realm Security is also filed under Data security posture management. Stellar Cyber is also filed under AI SOC analysts and MDR and managed SOC.
  • Realm Security lists Realm Platform, Realm Clarity AI, Detection Integrity and Privacy Guard. Stellar Cyber lists Stellar Cyber Open XDR Platform.
  • Stellar Cyber is privately held.

What it sells: Realm Security

What Realm Platform does[1][2][3]
The Realm Platform is the SOC-aware security data pipeline. The Realm Platform connects any source and sends data to any destination. Realm manages the infrastructure while the customer's SOC owns the decisions.
What Realm Clarity AI does[1][5]
Clarity AI profiles every source at the field level and models what each destination can consume. Recommendations are shown with a match rate and run in a pending state against live data before they go active. Clarity AI does the analysis and the customer's team approves the changes.
What Detection Integrity does[1][8]
Detection Integrity proves that a data cut did not cost a detection. Realm checks every reduction against the customer's live detections.
What Privacy Guard does[1][8]
Privacy Guard masks sensitive data in transit without altering structure, so parsers and detection logic keep working. Authorized investigators can retrieve unredacted values from Data Haven.

Questions about Realm Security and Stellar Cyber

What do Realm Security and Stellar Cyber sell?
Realm Security sells Realm Platform, Realm Clarity AI, Detection Integrity and Privacy Guard. Stellar Cyber sells Stellar Cyber Open XDR Platform.
Are Realm Security and Stellar Cyber in the same category?
They share SIEM. Realm Security's primary category is Security data lakes and pipelines and Stellar Cyber's is SIEM.
Who owns Realm Security and Stellar Cyber?
Stellar Cyber is privately held.
Who are Realm Security and Stellar Cyber sold to?
Realm Security reports enterprise demand for vendor-neutral control over the telemetry feeding SIEMs, data lakes and AI agents in the security operations center. Stellar Cyber describes its open SecOps platform as built for lean security teams and MSSPs.
What have Realm Security and Stellar Cyber announced recently?
October 29, 2026: Realm Security expanded its Realm Partner Program by adding Crush Security and ProCern Technology Solutions in North America. 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 Realm Security

Realm Security sells a SOC-aware Security Data Pipeline Platform, abbreviated SDPP. The Realm Platform is the company's SOC-aware security data pipeline. The Realm Platform connects any source and sends data to any destination. Realm Security gives security teams independent control over their telemetry before it reaches the SIEM, data lake, or AI agent. Realm Security sits upstream of the SIEM, data lake and AI agent, shaping telemetry before it reaches any of them. Realm Security is owned by no SIEM or destination, so customers can switch or consolidate downstream tools later without re-instrumenting.[1][2][3]

Realm Security describes legacy pipelines as shuttling raw data logs between tools, leaving analysts buried in irrelevant telemetry and budgets consumed by SIEM ingestion costs. Realm Security cites the 2025 SANS SOC Survey, which found that 42% of SOCs send all incoming data into a SIEM, often without a retrieval or management plan. Realm Security states that pipeline tools are increasingly being acquired by the SIEM vendors whose growth depends on volume flowing into their platforms.[6]

Realm Clarity AI understands what each source produces and what each destination needs, then shapes the flow between them. Clarity AI profiles every source at the field level and models what each destination can consume. Recommendations are shown with a match rate and run in a pending state against live data before they go active. Clarity AI does the analysis and the customer's team approves the changes. When Clarity AI is trained on a source, the customer receives source-specific, personalized reduction and redaction recommendations, vetted by Realm's security research team and shown with a match rate before the customer acts.

Realm Security reduces, enriches, redacts and transforms data on the rules a customer approved. Realm Security strips low-value, noisy telemetry before it reaches the SIEM. Realm Security injects context as logs pass through, so events arrive carrying the where and who. Realm Security normalizes disparate vendor formats into one schema, then shapes the same source differently for each destination. Privacy Guard discovers and masks PII, PHI, and PCI in transit without altering structure, so parsers and detection logic keep working. Authorized investigators can retrieve unredacted values from Data Haven. Data Haven keeps a complete, searchable copy and allows any event to be resupplied. Telemetry cut from the SIEM is retained in Data Haven as a complete, searchable copy. Detection Integrity proves that a data cut did not cost a detection. Realm checks every reduction against the customer's live detections.[1][3][8]

Realm Security ingests data across firewall, endpoint, identity, email and cloud sources. Any source that can deliver over a standard transport, such as syslog, an HTTP webhook, or S3, can connect using Custom CEF, JSON, or Syslog. For sources Realm pulls from, such as Salesforce, Realm manages the integration for the customer. A format-agnostic Collector and managed parsing onboard new sources without engineering on the customer's side. Schema drift detection catches source changes before they break parsing. Realm sends to Splunk, Microsoft Sentinel, Cortex XSIAM, CrowdStrike NG-SIEM and Sumo Logic, along with data lakes and archives.

Realm Security is deployed in about a week and is run by the SOC team itself. Realm manages the infrastructure while the customer's SOC owns the decisions. Realm automates filtering rule creation, configuration, routing decisions, and much more. One customer connected FortiGate firewalls feeding Sumo Logic and let Clarity AI shape the stream for what the destination needed. A Fortune 500 materials science company selected Realm to reduce SIEM ingestion costs without sacrificing detection coverage and to prepare its data layer for AI-driven SOC workflows.[1][6][8]

Realm Security is headquartered in Boston. Realm Security was founded by Peter Martin, Jeff Kraemer and Sanket Choksey. The founders played roles in creating, launching and scaling technology solutions for Carbon Black, Rapid7, Confer Technologies and Cisco Systems. Realm Security, Inc. raised $5 million in seed funding from Accomplice and Glasswing Ventures, announced September 12, 2024. Realm Security announced a $15 million Series A funding round led by Jump Capital, with participation from Glasswing Ventures and Accomplice. Realm Security announced a $2M strategic investment from Presidio Ventures, the corporate venture arm of Japanese-headquartered Sumitomo Corporation. Realm Security plans to use the investment to accelerate its Asia-Pacific expansion through channel partners and strengthen its executive team. Realm Security expanded its Realm Partner Program with the addition of Crush Security and ProCern Technology Solutions in North America. Crush Security is a cybersecurity VAR, and ProCern is an MSSP that integrates the Realm Platform into a fully managed data pipeline service.[1][2][3][6][10]

Realm Security on the record

Sources

Realm Security full record

  1. [1]realm.securityRealm Security · realm.security · undated page, accessed November 5, 2026 · Tier A
  2. [2]Realm Expands Channel Program with Crush Security and ProCernRealm Security · published October 29, 2026 · Tier A
  3. [3]Realm Security | The SOC-Aware Security Data PipelineRealm Security · undated page, accessed November 10, 2026 · Tier A
  4. [4]Realm.Security Doubles Customers in Q1 2026 | Realm.SecurityRealm Security · published June 3, 2026 · Tier A
  5. [5]Integrations: Any Source to Any SIEM or Lake | RealmRealm Security · undated page, accessed November 10, 2026 · Tier A
  6. [6]Realm.Security Raises $15 Million in Series A Funding - Realm.SecurityRealm Security · published October 8, 2025 · Tier A
  7. [7]Realm.Security Emerges from Stealth, Raises $5M to Manage Explosion of Cyber Security DataRealm Security · published September 12, 2024 · Tier A
  8. [8]Realm Platform: The SOC-Aware Security Data PipelineRealm Security · undated page, accessed November 10, 2026 · Tier A
  9. [9]Realm.Security Caps 2025 with $2M Strategic Investment from Presidio Ventures - Realm.SecurityRealm Security · published December 11, 2025 · Tier A
  10. [10]About Realm Security | Built by Security Data ExpertsRealm Security · undated page, accessed November 10, 2026 · Tier A
  11. [11]Realm Security Expands Channel Program with Crush Security and ProCern as Demand for Independent Data Pipelines Accelerates in AI EraPRNewswire · published October 29, 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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