CISO Tribune

Vendor comparison · 2 companies

Cranium vs Operant AI

Cranium sells Cranium ONE, one platform for end-to-end AI security and governance, which it describes as infrastructure and LLM-agnostic. Operant AI sells one platform covering Endpoints, Agents, MCPs, and AI applications. CISO Tribune files both under AI model and agent security. 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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Up to four companies side by side.

  • Cranium
  • Operant AI
Cranium vs Operant AI: Products, Customers and Funding Compared
CraniumCranium sells Cranium ONE, one platform for end-to-end AI security and governance, which it describes as infrastructure and LLM-agnostic.cranium.aiOperant AIOperant AI sells one platform covering Endpoints, Agents, MCPs, and AI applications.operant.ai
What it sells
  • Discover[1][16]Gives visibility into every AI model, agent, dataset and vendor across an enterprise and builds a system of record for them.
  • Govern[1][3][4][5][8][12]Defines, implements and enforces AI policy mapped to frameworks such as the NIST AI RMF and the EU AI Act.
  • Secure[1][6][13]Stress-tests models against adversarial threats and applies runtime defenses and targeted remediation.
  • Prove[1][7]Generates real-time compliance evidence, called Cranium AI Cards, to share with customers, partners and regulators.
  • Operant Semantic Firewall[1][7]Understands the intent behind every agent action and enforces an allow, block, or redact decision inline, in real time.
  • Agent Protector[1][5][6]Inventories all AI agents operating within an organization's infrastructure.
Categories
Headquarters
Short Hills, United States[3]San Francisco, United States[2]
Founded
Not stated on its pagesNot stated on its pages
Ownership and funding
Privately held[9][15]Privately held[1][3]
Named customers
Not stated on its pagesNot stated on its pages
Recent news
  • May 21, 2026Cranium AI and ISTARI announced a strategic partnership combining Cranium AI's security and governance platform with ISTARI's cyber resilience advisory expertise.[3]
  • May 21, 2026Cranium AI announced it has acquired Aiceberg, an agentic AI security and risk management company, and Aiceberg CEO Alex Schlager becomes Cranium AI's Chief Technology Officer.[15]
  • May 21, 2026Cranium AI and ISTARI, a cyber resilience advisory firm, announced a strategic partnership to offer organizations an AI security and governance solution.[8]
  • February 4, 2026Cranium AI announced it discovered an exploitation technique for hijacking agentic AI coding assistants and released free open-source IDE plugins for developers.[16]
  • May 4, 2026Operant AI launched Operant Endpoint Protector, a new addition to its AI Defense Platform for discovering and defending against threats across AI tools and coding agents.[4]
G2 and Gartner Peer Insights
  • G2: Not stated on its pages
  • Gartner Peer Insights: listed, seen October 24, 2026[9]
  • G2: Not stated on its pages
  • Gartner Peer Insights: Not stated on its pages
Who it fits
From its own pages, the company sells mainly to buyers who run AI across many models, since it states that its platform works with any model, any framework. It has pages for industries named Financial Services, Life Sciences and Telecommunications. It also has pages by job function for Compliance & Risk, Governance & Policy, Third-Party & Vendor Risk and Data Science. The pages also say that global carriers and banks are on board.It describes plans for teams putting their first production AI into customers' hands and for companies running AI across teams and products with critical data and compliance requirements. Its pages say regulated and government deployments mostly use the VPC, on-premise, or air-gapped options on the Enterprise plan. Workloads it covers range from coding agents on employee laptops to cloud agents across any infra.
Last verified
September 27, 2026September 27, 2026

Where they overlap

  • Cranium and Operant AI are both filed under AI model and agent security.
  • Both are headquartered in the United States.
  • Both are privately held.

Where they differ, field by field

  • Cranium's primary category is AI governance; Operant AI's is AI firewalls and guardrails.
  • Cranium lists Discover, Govern, Secure and Prove. Operant AI lists Operant Semantic Firewall and Agent Protector.
  • Cranium is headquartered in Short Hills, United States. Operant AI is headquartered in San Francisco, United States.

What it sells: Operant AI

What Operant Semantic Firewall does[1][7]
Operant Semantic Firewall holds an agent to its assigned purpose across the whole session, catching drift from manipulation or its own initiative. Operant can redact the sensitive part of an action and let the agent keep working within scope, instead of killing the workflow.
What Agent Protector does[1][5][6]
Agent Protector covers managed agents deployed through official channels and unmanaged agents running in cloud environments, SaaS platforms, and development tools. Agent Protector analyzes agent behavior patterns to identify and prevent security threats before they execute.

Questions about Cranium and Operant AI

What do Cranium and Operant AI sell?
Cranium sells Discover, Govern, Secure and Prove. Operant AI sells Operant Semantic Firewall and Agent Protector.
Are Cranium and Operant AI in the same category?
They share AI model and agent security. Cranium's primary category is AI governance and Operant AI's is AI firewalls and guardrails.
Where are Cranium and Operant AI headquartered?
Cranium is headquartered in Short Hills, United States. Operant AI is headquartered in San Francisco, United States.
Who owns Cranium and Operant AI?
Cranium is privately held. Operant AI is privately held.
Who are Cranium and Operant AI sold to?
From its own pages, the company sells mainly to buyers who run AI across many models, since it states that its platform works with any model, any framework. It describes plans for teams putting their first production AI into customers' hands and for companies running AI across teams and products with critical data and compliance requirements.
What have Cranium and Operant AI announced recently?
May 21, 2026: Cranium AI and ISTARI announced a strategic partnership combining Cranium AI's security and governance platform with ISTARI's cyber resilience advisory expertise. May 4, 2026: Operant AI launched Operant Endpoint Protector, a new addition to its AI Defense Platform for discovering and defending against threats across AI tools and coding agents.

About Cranium

Cranium sells Cranium ONE, one platform for end-to-end AI security and governance, which it describes as infrastructure and LLM-agnostic. Cranium organizes the platform around the AI Trust Loop, five stages that run continuously: Discover, Observe, Govern, Secure and Prove.[1][4][5][6]

Cranium says AI adoption expands what an enterprise has to defend. Its pages name three problem areas: shadow AI, autonomous agents and third-party AI. Cranium says teams adopt models and copilots faster than security can see them, and that agents plan, call tools, read memory and hand off to other agents. Cranium also says an AI supply chain runs through vendors a buyer does not control.[1]

In the Discover stage, Cranium says a buyer gains visibility into every AI model, agent, dataset and vendor across the enterprise and builds one living system of record. Cranium describes automated AI discovery and inventory, and an AI Bill of Materials for each system.[1][10]

In the Observe stage, Cranium says buyers can track, evaluate and understand complex model and agent behaviors, along with token usage and cost efficiency. Cranium describes sessions views, sequence diagrams of agent tool calls and event-level drill-downs. It cites 100+ risk signals and 250+ intent classifications. Cranium says verdicts come from deterministic classifiers, and that Trace shows the samples, labels and relevance scores behind each decision.[1][6][11]

In the Govern stage, Cranium says buyers can define, implement and enforce AI policy, mapped to NIST AI RMF, the EU AI Act and internal standards. Cranium also names ISO 42001 as a mapped framework. Cranium ComplianceAgent automates framework completion with human oversight, and continuous compliance scoring shows where each system stands.[1][12]

In the Secure stage, Cranium says buyers can stress-test models against real-world threats, surface vulnerabilities and apply targeted controls before and after deployment. Cranium Arena is its agent-based red teaming, using MITRE ATLAS, OWASP and Cranium AI threat libraries. Cranium Arena Shield turns findings into auto-generated remediations and guardrails, and re-tests to verify the fix.[1][13]

In the Prove stage, Cranium says buyers can demonstrate compliance posture on demand and share evidence with customers, partners and regulators through real-time Cranium AI Cards and Trust Hubs.[1][14]

Cranium says it fits its controls to finance, life sciences and telecom. Cranium states that it is SOC 2 Type 2 compliant and ISO 27001 certified, and an active member of the U.S AI Safety Institute Consortium (AISIC), established by NIST.[1][2][5][10]

Cranium on the record

Sources

Cranium full record

  1. [1]Cranium – Secure & Govern Enterprise AICranium · undated page, accessed September 27, 2026 · Tier A
  2. [2]Cranium ai security 2023KPMG · kpmg.com · published April 5, 2023 · Tier A
  3. [3]Cranium AI and ISTARI Forge Global Alliance to Drive Enterprise AI Security and GovernanceCranium · undated page, accessed September 27, 2026 · Tier A
  4. [4]AI Security & Governance Platform – CraniumCranium · undated page, accessed October 24, 2026 · Tier A
  5. [5]AI Security & Governance Solutions – CraniumCranium · undated page, accessed October 24, 2026 · Tier A
  6. [6]Enterprise AI Security Solutions – CraniumCranium · undated page, accessed October 24, 2026 · Tier A
  7. [7]AI Compliance — EU AI Act, NIST & ISO 42001 – CraniumCranium · undated page, accessed October 24, 2026 · Tier A
  8. [8]Cranium AI and ISTARI Forge Global Alliance to Drive Enterprise AI Security and GovernanceBusiness Wire · published May 21, 2026 · Tier A
  9. [9]Cranium Reviews, Ratings & Features 2026 | Gartner Peer InsightsGartner Peer Insights · undated page, accessed October 24, 2026 · Tier C
  10. [10]For Security Teams – Cranium AICranium · undated page, accessed November 5, 2026 · Tier A
  11. [11]AI Observability & Runtime Monitoring – Cranium AICranium · undated page, accessed November 5, 2026 · Tier A
  12. [12]AI Governance & Policy Enforcement – Cranium AICranium · undated page, accessed November 5, 2026 · Tier A
  13. [13]AI Red Teaming & Attack Simulation – Cranium AICranium · undated page, accessed November 5, 2026 · Tier A
  14. [14]For Compliance & Risk Leaders – Cranium AICranium · undated page, accessed November 5, 2026 · Tier A
  15. [15]Cranium AI Acquires Aiceberg to Strengthen its End-to-End AI Security, Governance and Agentic AI PlatformCranium AI · published May 21, 2026 · Tier A
  16. [16]Cranium AI Issues Critical Remediation for Vulnerability to Protect Leading AI Coding AssistantsBusiness Wire · published February 4, 2026 · Tier A

Operant AI full record

  1. [1]Operant AI - Secure Your AIOperant AI · undated page, accessed September 27, 2026 · Tier A
  2. [2]Operant ai launches agent protector the first real time agentic security solution enabling safe ai agent innovation at scaleOperant AI via GlobeNewswire · globenewswire.com · published February 5, 2026 · Tier A
  3. [3]Operant ai secures 10m series a to protect the modern cloud across apis applications and aiOperant AI via GlobeNewswire · globenewswire.com · published September 12, 2024 · Tier A
  4. [4]Operant AI Endpoint Protector secures AI agents and MCP toolsHelp Net Security · published May 4, 2026 · Tier B
  5. [5]Pricing - AI & Agent Security Platform | Operant AIOperant AI · undated page, accessed November 10, 2026 · Tier A
  6. [6]Agent Protector: Real-Time AI Agent Security | OperantOperant AI · undated page, accessed November 10, 2026 · Tier A
  7. [7]Operant Semantic Firewall | Govern AI Agents in Real TimeOperant AI · undated page, accessed November 10, 2026 · Tier A
  8. [8]Operant MCP GatewayOperant AI · undated page, accessed November 10, 2026 · Tier A
  9. [9]AI GatekeeperOperant AI · undated page, accessed November 10, 2026 · Tier A
  10. [10]AI Application SecurityOperant AI · undated page, accessed November 10, 2026 · Tier A
  11. [11]API & Cloud Protector | Real-Time API Security | Operant AIOperant AI · undated page, accessed November 10, 2026 · Tier A
  12. [12]Woodpecker: Open Source Red Teaming for AI, APIs & K8sOperant AI · undated page, accessed November 10, 2026 · Tier A
  13. [13]FAQsOperant AI · undated page, accessed November 10, 2026 · Tier A
  14. [14]Start Your Free 7-Day Trial | Operant AI Security PlatformOperant AI · undated page, accessed November 10, 2026 · Tier A

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