CISO Tribune

Vendor comparison · 2 companies

Operant AI vs Pillar Security

Operant AI sells one platform covering Endpoints, Agents, MCPs, and AI applications. Pillar Security sells one platform to discover, test, secure and govern every AI agent across an organization. CISO Tribune files both under AI firewalls and guardrails and 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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  • Operant AI
  • Pillar Security
Operant AI vs Pillar Security: Products, Customers and Funding Compared
Operant AIOperant AI sells one platform covering Endpoints, Agents, MCPs, and AI applications.operant.aiPillar SecurityPillar Security sells one platform to discover, test, secure and govern every AI agent across an organization.pillar.security
What it sells
  • 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.
  • Agentic Endpoint[7][10]Protects the AI agents that run on employee machines.
Categories
Headquarters
San Francisco, United States[2]Not stated on its pages
Founded
Not stated on its pagesNot stated on its pages
Ownership and funding
Privately held[1][3]Owned by Vanta
Named customers
Not stated on its pagesNot stated on its pages
Recent news
  • 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]
  • November 9, 2026Vanta signed a definitive agreement to acquire Pillar Security, an AI security platform that protects AI agents across their lifecycle.[11]
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
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.Not written yet
Last verified
September 27, 2026November 10, 2026

Where they overlap

  • Operant AI and Pillar Security are both filed under AI firewalls and guardrails and AI model and agent security.

Where they differ, field by field

  • Operant AI's primary category is AI firewalls and guardrails; Pillar Security's is AI model and agent security.
  • Pillar Security is also filed under AI governance and Workforce AI usage security.
  • Operant AI lists Operant Semantic Firewall and Agent Protector. Pillar Security lists Agentic Endpoint.
  • Operant AI is headquartered in San Francisco, United States.
  • Operant AI is privately held. Pillar Security is owned by Vanta.

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.

What it sells: Pillar Security

What Agentic Endpoint does[7][10]
Pillar deploys through an MDM and inventories the AI coding agents across a fleet: which agents run where, their versions, sandbox state and risk. Runtime Guardian sits in the agent's own pre-tool hook for Claude Code, Codex CLI and Cursor, and decides on every action before it runs. Pillar inventories local and remote servers across a fleet and scores each against a catalog of 23,000+ pre-analyzed servers.

Questions about Operant AI and Pillar Security

What do Operant AI and Pillar Security sell?
Operant AI sells Operant Semantic Firewall and Agent Protector. Pillar Security sells Agentic Endpoint.
Are Operant AI and Pillar Security in the same category?
They share AI firewalls and guardrails and AI model and agent security. Operant AI's primary category is AI firewalls and guardrails and Pillar Security's is AI model and agent security.
Where are Operant AI and Pillar Security headquartered?
Operant AI is headquartered in San Francisco, United States.
Who owns Operant AI and Pillar Security?
Operant AI is privately held. Pillar Security is owned by Vanta.
Who are Operant AI and Pillar Security sold to?
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 Operant AI and Pillar Security announced recently?
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. November 9, 2026: Vanta signed a definitive agreement to acquire Pillar Security, an AI security platform that protects AI agents across their lifecycle.

About Operant AI

Operant AI sells one platform covering Endpoints, Agents, MCPs, and AI applications. Operant AI describes its platform as discovering, detecting, and defending all AI, agents, and MCP in real time. Operant AI says many customers start with Endpoint Protector or Agent Protector and add MCP Gateway and AI Gatekeeper as their AI footprint expands. Operant AI says all plans include the full Operant platform and differ in depth, deployment options, and the level of partnership.[5]

Endpoint Protector enforces AI trust boundaries on the laptop. Endpoint Protector discovers Shadow AI tools, coding agents, and MCP clients on employee devices. Endpoint Protector monitors agent loops and blocks prompt injection, data exfiltration, and malicious shell execution directly on the device. Operant AI's endpoint coverage provides governance and runtime detection for coding and coworking agents running on employee endpoints.[5]

Agent Protector inventories all AI agents operating within an organization's infrastructure. Agent Protector covers managed agents deployed through official channels and unmanaged agents running in cloud environments, SaaS platforms, and development tools. Agent Protector blocks the action inline when an agent attempts to access resources outside its established patterns, escalate privileges, or exhibit signs of data exfiltration. Agent Protector analyzes agent behavior patterns to identify and prevent security threats before they execute. Agent Protector monitors behavior, detects threats, and blocks attacks from zero-click exploits to data exfiltration and rogue agents. Operant AI's cloud agent coverage provides runtime security for homegrown and cloud-native agents, with support for AWS and Azure.[5][6]

Operant Semantic Firewall understands the intent behind every agent action and enforces an allow, block, or redact decision inline, in real time. Operant AI reads the meaning of every prompt, plan, tool call, command, and data payload before it executes. Operant Semantic Firewall holds an agent to its assigned purpose across the whole session, catching drift from manipulation or its own initiative. Operant Semantic Firewall enforces access by data sensitivity, honoring the classification labels governance tools already set. Operant AI can redact the sensitive part of an action and let the agent keep working within scope, instead of killing the workflow.[7]

Operant AI provides visibility and controls for every MCP server, client, tool, and connection in an environment, with MCP registries, white list and black lists, and NHI access controls. Operant AI catalogs MCP tools and discovers AI agents in real time across all environments. Operant AI detects prompt injections, jailbreaks, tool poisoning, and unauthorized access patterns across all MCP client and server interactions in real time. Operant AI implements MCP trust zones with real-time blocking of untrusted servers and tools. Operant AI prevents leaks of sensitive data and intellectual property through flow blocking and automatic redaction. Operant AI enforces least privilege execution controls and detailed access permissions for MCP tool usage.[8]

AI Gatekeeper detects and blocks unauthenticated and unauthorized AI behavior in real time. Operant AI's AI application coverage is an LLM gateway with native firewall, offering multi-provider routing, request inspection, and traffic security for every AI application. Operant AI's 3D Runtime Defense provides real-time security across every cluster and every cloud, from infra to APIs. Operant AI detects and prioritizes AI-specific risks such as prompt injection, LLM poisoning, model theft, and sensitive data leakage. Operant AI applies in-line auto-redaction and obfuscation of sensitive and PII data.[5][9][10]

Operant API & Cloud Protector catches and blocks malicious traffic at ingress and egress. Operant AI protects internal and third party API interactions with K8s-native controls for protocol specific authentication, authorization, traffic rate limiting, and API to API microsegmentation. Woodpecker provides flexible and extensible red teaming frameworks for K8s, APIs, and AI models and agents, and enables multi-layer threat simulation across runtime, APIs, and LLM integrations. Woodpecker covers prompt injection, jailbreaks, model theft, sensitive data leakage, and more.[11][12]

Operant AI describes deployment as a single step helm install with zero instrumentation and zero integrations. Operant starts in observe-only mode by default, and customers decide when and where to enable enforcement. Operant AI offers VPC, on-premise, and air-gapped deployments on the Enterprise plan. Operant AI says pricing scales with the breadth and depth of its customers' AI surface, including endpoints under management, agents in production, and the governance needed across MCPs and AI applications. Operant AI supports workloads from coding agents on employee laptops to cloud agents across any infra, including LLM apps, AI agents, MCP servers, microservices, APIs, and traditional environments. Operant AI covers SaaS agents including Glean, Salesforce Agentforce, and Microsoft Copilot.[5][9][11][12][13][14]

Operant AI on the record

Sources

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

Pillar Security full record

  1. [1]pillar.securityPillar Security · pillar.security · undated page, accessed November 10, 2026 · Tier A
  2. [2]Pillar Security | Securing the Agentic WorkforcePillar Security · undated page, accessed November 11, 2026 · Tier A
  3. [3]Pillar Security Platform | Securing the Entire AI Software LifecyclePillar Security · undated page, accessed November 11, 2026 · Tier A
  4. [4]AI Discovery & Posture | Pillar SecurityPillar Security · undated page, accessed November 11, 2026 · Tier A
  5. [5]AI Red Teaming & Risk Detection | Pillar SecurityPillar Security · undated page, accessed November 11, 2026 · Tier A
  6. [6]AI Runtime Guardrails | Pillar SecurityPillar Security · undated page, accessed November 11, 2026 · Tier A
  7. [7]Agentic Endpoint: Secure AI Coding Agents | Pillar SecurityPillar Security · undated page, accessed November 11, 2026 · Tier A
  8. [8]AI Security Solutions | Pillar SecurityPillar Security · undated page, accessed November 11, 2026 · Tier A
  9. [9]AI Governance & Compliance | Pillar SecurityPillar Security · undated page, accessed November 11, 2026 · Tier A
  10. [10]Deployment Options: Cloud, Self-Hosted, Hybrid · PillarPillar Security · undated page, accessed November 11, 2026 · Tier A
  11. [11]Vanta to Acquire Pillar Security to Turn AI Policy Into PracticeBusiness Wire · published November 9, 2026 · Tier A

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