Proprietary Data and Trade Secrets
This is the most critical category of information to protect. Any internal data that gives your company a competitive edge should never be shared with a public AI model. This includes source code, product roadmaps, unreleased financial results, marketing
strategies, and internal sales data. When you paste this information into a public chatbot, you are essentially handing it to a third party. Many AI companies use customer inputs to train their models, meaning your confidential data could inadvertently be used to inform a competitor's query down the line. Some companies have already banned tools like ChatGPT after proprietary code was leaked.
Customer and Client Information
Pasting any data belonging to your customers or clients is a major breach of trust and likely a violation of privacy laws and contractual agreements like NDAs. This includes names, contact details, purchase histories, and any form of personally identifiable information (PII). Exposing this data can lead to significant legal and financial penalties for your company and damage its reputation. Even if you're just trying to summarize a client email or analyze customer feedback, you must anonymize the data completely before using an external AI tool. A good rule of thumb is to ask yourself if you would email the information to an outside vendor without a contract; if the answer is no, don't paste it into a chatbot.
Employee and HR Information
Sensitive employee data, such as performance reviews, salary information, health records, or disciplinary actions, must remain confidential. Using an AI tool to draft a performance review or analyze team feedback might seem efficient, but it puts private personnel files at risk. Furthermore, employers should never use AI to make final decisions about hiring, firing, or promotions without significant human oversight, as it can introduce bias and create legal problems. Your employer may also have the ability to see what you enter into company-managed AI tools, making it a poor choice for sensitive discussions.
Login Credentials and System Configurations
This should be a given, but it happens. Never paste passwords, API keys, access tokens, or server configuration files into a chatbot, even if you are troubleshooting a technical problem. This information is the digital key to your company's kingdom. Leaking it could provide an easy entry point for malicious actors, leading to a catastrophic data breach. Security vulnerabilities can and do happen, as demonstrated by a test where an AI agent broke into a major consulting firm's internal chatbot and accessed millions of records. Always treat credentials as highly toxic data that should never leave a secure, approved environment.
Internal Communications and Drafts
Seemingly harmless internal chatter can be risky. Pasting a long email thread or a transcript from a private meeting to get a summary might expose sensitive internal debates, disagreements, or strategic pivots. Even documents marked as "draft" can contain confidential information that hasn't been approved for wider viewing. Since many AI models can learn from the data they process, you could be training them on your company's internal politics and unfinished ideas, which could surface in unexpected ways later. It's wiser to use company-approved, secure AI tools designed for internal use.
Legal and Financial Documents
Do not use public AI tools to review contracts, analyze financial statements, or get legal advice. These documents are filled with sensitive, privileged information. AI chatbots are not qualified legal or financial professionals and relying on them for this work can introduce critical errors or expose your data. A leaked contract could reveal negotiating terms to other parties, while exposed financial data can violate regulations and create security risks for the company. Always use vetted human experts and secure, purpose-built software for these tasks.














