Solutions / Securing ChatGPT and Codex
Secure ChatGPT and Codex across the workforce
Give employees room to use ChatGPT and Codex while keeping sensitive data, connected systems, and agent actions within policy.
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Why Harmonic for OpenAI
We make protecting ChatGPT and Codex simple
In many teams, ChatGPT and Codex are now the first place people go to get work done. Harmonic shows you how your company uses them and applies context-aware guardrails that protect sensitive information and govern what agents do.
01Understand usage
Understand exactly how ChatGPT and Codex are used
Discover ChatGPT and Codex usage wherever employees work with them, including chatgpt.com, the ChatGPT desktop app and its Codex mode, and the Codex CLI. Monitor usage even when employees are on free or personal plans, and set plan-specific policies.
Understand how employees use each tool down to the task level, including which use cases lead to the riskiest behavior and which are driving real productivity.
02Protect data in context
Protect sensitive information in context
Ensure employees never share information they shouldn't with ChatGPT or Codex. Harmonic's models read through a conversation just like a human would, and understand what's sensitive in context rather than matching a fixed pattern.
Deliver inline controls across web and desktop with a clear explanation for employees of what triggered each warning or intervention.
03Govern agents
Govern agents without interrupting workflows
Monitor exactly what tools Codex and ChatGPT agents are connecting to, and what actions they take on an employee’s behalf.
When an agent attempts an action that isn’t permitted, Harmonic intervenes in real time and explains exactly why, without stopping the workflow, so both the human and the agent stay on task.
Top resources
Resources for security teams securing OpenAI
Practical guidance for locking down ChatGPT and Codex on the web, in the desktop app and in the terminal.
Datasheet
Harmonic Command
Agent and MCP governance, prompt-injection protection and Connectors, in one PDF.
Handbook
OpenAI security guidance
Configuration and governance controls for OpenAI products.
Frequently asked questions
Quick answers about securing ChatGPT and Codex
Short, direct answers to what security and IT teams ask before bringing Harmonic in.
Can't I just use the OpenAI Compliance Platform?
The OpenAI Compliance Platform gives you useful logs, but only for activity inside your ChatGPT Enterprise or Edu workspace. Personal and free accounts are out of view, it can't stop sensitive data before it's sent, and it doesn't see any AI tools outside OpenAI.
How is this different from CrowdStrike or other EDR?
EDR is designed to monitor processes running on the endpoint and detect malware. CrowdStrike and other vendors have minimal visibility into what's being done by employees within AI tools on the desktop. They'll know that an application is being run, and they could block it entirely, but they are unable to provide the task-level intelligence and granular guardrails needed to safely use AI.
What OpenAI surfaces do you actually cover?
We provide discovery, monitoring, and inline guardrails across ChatGPT and Codex on the web, on the desktop, and within command line interfaces. The Endpoint Agent also discovers direct calls to OpenAI APIs from scripts and other applications.
Get started
Build your AI guardrails for ChatGPT and Codex
Gain the visibility and control you need to guide ChatGPT and Codex use with confidence. Most teams see first insight in about 30 minutes.
What you'll see with Harmonic Security
- Your full ChatGPT and Codex footprint: every surface, every team, every exposure.
- Inline guardrails that coach, warn, or block — firing in under 200ms.
- See and control what Codex and ChatGPT agents are actually doing.
- Coverage through the Browser Extension, Endpoint Agent, local MCP Gateway and Harmonic Connectors.
- Deployment in minutes via Intune, Jamf, or Kandji.
