CISO Tribune

Vendor comparison · 2 companies

Cymulate vs Horizon3.ai

Cymulate sells the Cymulate Platform, which turns validation into a continuous, adaptive process of agentic cyber defense engineering. Horizon3.ai sells NodeZero, a platform that autonomously executes real attack techniques in production environments so organizations can find exploitable weaknesses, fix them and verify the fixes. CISO Tribune files both under Breach simulation and automated pen-testing. 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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  • Cymulate
  • Horizon3.ai
Cymulate vs Horizon3.ai: Products, Customers and Funding Compared
CymulateCymulate sells the Cymulate Platform, which turns validation into a continuous, adaptive process of agentic cyber defense engineering.cymulate.comHorizon3.aiHorizon3.ai sells NodeZero, a platform that autonomously executes real attack techniques in production environments so organizations can find exploitable weaknesses, fix them and verify the fixes.horizon3.ai
What it sells
  • Cymulate Platform[3][6]Turns validation into a continuous process of agentic cyber defense engineering.
  • Cymulate Detection Studio[3][7]Automates SIEM rule validation and detection tuning.
  • NodeZero[2][3][5][6][7][8][9][10][14]An autonomous platform that executes real attack techniques in production.
  • Endpoint Security Effectiveness[3][7]Tests how endpoint protections respond to real attack behavior.
Categories
Headquarters
Not stated on its pagesSan Francisco, United States[1][11]
Founded
2016[2][9]2019[1][11]
Ownership and funding
Not stated on its pagesPrivately held[2][3]
Named customers
Not stated on its pagesNot stated on its pages
Recent news
  • August 4, 2026Cymulate announced the introduction of Cymulate Cowork, the Cymulate Claude Plugin and the Cymulate MCP Server.[12]
  • August 4, 2026Cymulate announced plans for a new integration with Bitsight to connect threat intelligence with continuous exposure validation.[11]
  • November 5, 2026Horizon3 appointed Chris Wood as Director of Sales for Australia and New Zealand and Vivienne Horsfall as Growth Marketing Director for Asia Pacific and Japan.[13]
  • July 29, 2026Horizon3 announced an expansion of its NodeZero platform to include AI-powered web application pentesting capabilities.[14]
  • July 15, 2026Horizon3 announced it is taking part in Anthropic's Project Glasswing, an initiative focused on securing critical infrastructure.[12]
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
From its own pages, Cymulate sells mainly to security teams that need continuous validation, including security operations, detection engineering, red teams and exposure management teams. Cymulate says it supports organizations of all sizes, from mid-market to enterprise, especially those with complex or evolving security stacks. Cymulate also says it serves executives, security operations and the whole security program. For detection work, Cymulate says its Detection Engineering offering is aimed at SOC and Detection Engineering teams.From its own pages, Horizon3.ai sells mainly to security teams that want to test their defenses with real attacks in production. It names banks, healthcare systems, energy providers, manufacturers, governments and defense contractors as organizations that rely on NodeZero. Its pages describe customers ranging from the Global 100 to a local hospital.
Last verified
November 2, 2026September 27, 2026

Where they overlap

  • Breach simulation and automated pen-testing is the primary category of both Cymulate and Horizon3.ai.

Where they differ, field by field

  • Cymulate lists Cymulate Platform and Cymulate Detection Studio. Horizon3.ai lists NodeZero and Endpoint Security Effectiveness.
  • Horizon3.ai is headquartered in San Francisco, United States.
  • Cymulate was founded in 2016. Horizon3.ai was founded in 2019.
  • Horizon3.ai is privately held.

How they differ

CISO Tribune files both Cymulate and Horizon3.ai under Breach simulation and automated pen-testing, as their primary category. Cymulate sells the Cymulate Platform, which combines breach and attack simulation, exposure validation and remediation guidance in a single platform. It also sells Cymulate Detection Studio, which automates SIEM rule validation and detection tuning. Horizon3.ai sells NodeZero, an autonomous platform that executes real attack techniques in production, delivered via multi-tenant SaaS. Horizon3.ai also sells Endpoint Security Effectiveness, which tests how endpoint protections respond to real attack behavior, and pentesting for compliance delivered by OSCP pentesters together with NodeZero.

Cymulate was founded in 2016, while Horizon3.ai was founded in 2019 and is headquartered in San Francisco, United States. Horizon3.ai is privately held. Cymulate says it supports organizations of all sizes, from mid-market to enterprise, and is built for security operations, detection engineering, red teams and exposure management teams. Horizon3.ai says NodeZero serves customers from the Global 100 to a local hospital, and names banks, healthcare systems, energy providers, manufacturers, governments and defense contractors.

On August 4, 2026, Cymulate announced Cymulate Cowork, the Cymulate Claude Plugin and the Cymulate MCP Server. The same day, Cymulate announced plans for an integration with Bitsight to connect threat intelligence with continuous exposure validation. Horizon3.ai announced on July 29, 2026 an expansion of NodeZero to include AI-powered web application pentesting capabilities. On July 15, 2026, Horizon3.ai announced it is taking part in Anthropic's Project Glasswing, an initiative focused on securing critical infrastructure.

What it sells: Cymulate

What Cymulate Platform does[3][6]
Cymulate turns validation into a continuous, adaptive process of agentic cyber defense engineering. The platform includes a daily feed of the latest threats with a 24-hour SLA for updated attack simulations for new US Cert threat advisories. Testing results create scorecards and benchmarks for security controls, MITRE ATT&CK coverage and specific threats.

What it sells: Horizon3.ai

What NodeZero does[2][3][5][6][7][8][9][10][14]
NodeZero is described as an autonomous platform capable of executing self-directed actions to achieve an objective. Horizon3.ai says it executes real attack techniques without agents or disruption. It is delivered via multi-tenant SaaS.
What Endpoint Security Effectiveness does[3][7]
NodeZero checks for EDR presence on each host. It then executes techniques ranging from credential theft to privilege escalation and lateral movement. Every action is mapped to a MITRE ATT&CK TTP and labeled blocked or permitted.

Questions about Cymulate and Horizon3.ai

What do Cymulate and Horizon3.ai sell?
Cymulate sells Cymulate Platform and Cymulate Detection Studio. Horizon3.ai sells NodeZero and Endpoint Security Effectiveness.
Are Cymulate and Horizon3.ai in the same category?
Yes. Breach simulation and automated pen-testing is the primary category of both on CISO Tribune.
Where are Cymulate and Horizon3.ai headquartered?
Horizon3.ai is headquartered in San Francisco, United States.
When were Cymulate and Horizon3.ai founded?
Cymulate was founded in 2016. Horizon3.ai was founded in 2019.
Who owns Cymulate and Horizon3.ai?
Horizon3.ai is privately held.
Who are Cymulate and Horizon3.ai sold to?
From its own pages, Cymulate sells mainly to security teams that need continuous validation, including security operations, detection engineering, red teams and exposure management teams. From its own pages, Horizon3.ai sells mainly to security teams that want to test their defenses with real attacks in production.
What have Cymulate and Horizon3.ai announced recently?
August 4, 2026: Cymulate announced the introduction of Cymulate Cowork, the Cymulate Claude Plugin and the Cymulate MCP Server. November 5, 2026: Horizon3 appointed Chris Wood as Director of Sales for Australia and New Zealand and Vivienne Horsfall as Growth Marketing Director for Asia Pacific and Japan.

About Cymulate

Cymulate sells the Cymulate Platform, which turns validation into a continuous, adaptive process of agentic cyber defense engineering. Cymulate says manual testing and control updates can take days to adapt to new threats. With Vero AI, Cymulate says it understands new threats, tailors validation to the customer's environment and turns findings into prioritized actions and automated security control updates.[1][3][5][7]

Cymulate says its threat library has full MITRE ATT&CK coverage. The platform includes a daily feed of the latest threats with a 24-hour SLA for updated attack simulations for new US Cert threat advisories. Cymulate safely simulates real-world attack techniques across endpoints, networks, email, web gateways and cloud environments, with integrations to the controls and SIEM to prove both prevention and detection. Testing results create scorecards and benchmarks for security controls, MITRE ATT&CK coverage and specific threats. Cymulate combines breach and attack simulation, exposure validation and actionable remediation guidance in a single platform.[1][3][5][8]

For exposure management, Cymulate says customers can automate validation as part of a continuous threat exposure management program. Cymulate lets customers push vendor-specific threat mitigation and behavior rules for immediate prevention or detection. Cymulate Auto Mitigate deploys relevant IoCs to security controls after teams follow remediation guidance for validated gaps. The Cymulate + Bitsight integration creates a closed loop between adversary intelligence and continuous exposure validation. In the Cymulate Platform, Bitsight provides relevant adversaries, campaigns, ransomware groups, APTs, TTPs, IoCs and targeting trends that are then used to focus testing and validation workflows.[3][5][6][7]

On detection, Cymulate Detection Studio automates SIEM rule validation and detection tuning against real-world attacks. Cymulate says it transforms detection engineering from a manual, resource-intensive process into a continuous, automated lifecycle. Vero AI maps rules to attack scenarios, tests detection performance, identifies gaps and recommends or generates new rules. Cymulate generates Sigma rules and vendor-specific detection rules from validated gaps and provides guided tuning for the rules customers already have. Once deployed, rules are retested against the original attack scenario to confirm they improved detection. Cymulate simulations are production-safe: they reproduce the techniques and behavior of real attacks without executing actual malicious payloads or causing damage to systems or data.[3][7][8]

Cymulate says it is built for security teams that need continuous validation across their environment, including security operations, detection engineering, red teams and exposure management teams. Cymulate says it supports organizations of all sizes, from mid-market to enterprise, especially those with complex or evolving security stacks. Cymulate says it empowers executives, security operations and the whole security program to continuously prove, prioritize and adapt security for specific threats and exposures.[3][5][8]

Cymulate was founded by former IDF intelligence officers and cyber researchers. Cymulate says its platform runs on a private AWS tenant engineered for isolation, high availability, and redundancy across multiple regions. Cymulate does not collect or store sensitive Personal Identifying Information or PCI-DSS cardholder data. Cymulate states that data stored in databases and AWS is encrypted with AES-256. Cymulate has independent external auditor attestation across the Security, Availability, Confidentiality and Privacy Trust Services Criteria, and a public SOC 3 report.[3][8]

Cymulate on the record

Sources

Cymulate full record

  1. [1]cymulate.comCymulate · cymulate.com · undated page, accessed September 27, 2026 · Tier A
  2. [2]About usCymulate · cymulate.com · undated page, accessed September 27, 2026 · Tier A
  3. [3]Cymulate | AI-Powered Exposure ValidationCymulate · undated page, accessed October 24, 2026 · Tier A
  4. [4]Cymulate Reviews 2026: Details, Pricing, & Features - G2G2 · undated page, accessed October 24, 2026 · Tier C
  5. [5]Cymulate Platform: Real-Time Automated Security ValidationCymulate · undated page, accessed November 3, 2026 · Tier A
  6. [6]Cymulate + Bitsight | Threat Intelligence Meets Exposure ValidationCymulate · undated page, accessed November 3, 2026 · Tier A
  7. [7]Cymulate's SIEM detection and analysisCymulate · undated page, accessed November 3, 2026 · Tier A
  8. [8]Detection Engineering - CymulateCymulate · undated page, accessed November 3, 2026 · Tier A
  9. [9]About us - Learn about CymulateCymulate · undated page, accessed November 3, 2026 · Tier A
  10. [10]Security at Cymulate - CymulateCymulate · undated page, accessed November 3, 2026 · Tier A
  11. [11]Cymulate and Bitsight Integrate Threat Intelligence & ValidationCymulate · published August 4, 2026 · Tier A
  12. [12]Cymulate Debuts Cowork, Claude Plugin and MCPCymulate · published August 4, 2026 · Tier A

Horizon3.ai full record

  1. [1]About usHorizon3.ai · horizon3.ai · undated page, accessed September 27, 2026 · Tier A
  2. [2]Horizon3 raises 250m series e at 2b valuation to lead the ai vs ai cybersecurity eraHorizon3.ai · horizon3.ai · published August 3, 2026 · Tier A
  3. [3]Home | Horizon3.aiHorizon3.ai · undated page, accessed October 25, 2026 · Tier A
  4. [4]Why Continuous Exposure Management Matters for Financial ServicesHorizon3.ai · undated page, accessed October 25, 2026 · Tier A
  5. [5]The Future of Security: Our Vision | Horizon3Horizon3.ai · undated page, accessed November 5, 2026 · Tier A
  6. [6]Compliance Solutions for Cybersecurity | Horizon3Horizon3.ai · undated page, accessed November 5, 2026 · Tier A
  7. [7]Endpoint Security Effectiveness | Horizon3Horizon3.ai · undated page, accessed November 5, 2026 · Tier A
  8. [8]Identity Security Validation | Horizon3Horizon3.ai · undated page, accessed November 5, 2026 · Tier A
  9. [9]Why Our Platform Wins | Horizon3Horizon3.ai · undated page, accessed November 5, 2026 · Tier A
  10. [10]HomeECB AI Cybersecurity Mandate | NodeZero® | Horizon3Horizon3.ai · undated page, accessed November 5, 2026 · Tier A
  11. [11]The Team | Horizon3Horizon3.ai · undated page, accessed November 5, 2026 · Tier A
  12. [12]Horizon3 Joins Anthropic’s Project Glasswing to Help Defend Critical Infrastructure with the Attacker’s PerspectiveHorizon3 · published July 15, 2026 · Tier A
  13. [13]Horizon3 Expands Australia and New Zealand Team, Strengthens APJ InvestmentHorizon3 · published November 5, 2026 · Tier A
  14. [14]Horizon3’s NodeZero® AI Hacker Extends Production-Safe Autonomous Pentesting to Web ApplicationsHorizon3 · published July 29, 2026 · Tier A

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