You’ve probably heard it a thousand times by now: we’re living in the age of AI. From small startups to tech giants, everyone is using tools like ChatGPT, Gemini, and Claude to work faster and smarter. It feels like having a super-powered intern at your fingertips 24/7.
But before you paste that next document or snippet of code, you need to be careful. Public AI models aren’t vaults; they’re more like sponges. They soak up what you tell them to “learn” and improve, which means your private info could technically resurface somewhere else.
If you want to keep your business safe while still enjoying the perks of AI, here are the seven types of data you should never, ever share.
1. Credit Card and Bank Information
It’s tempting to ask an AI to help you categorize expenses or build a budget, but don’t ever paste your actual financial identifiers. This includes credit card numbers, CVVs, bank routing numbers, or full transaction histories.
Standard chatbots don’t have the same security regulations as your bank. Once you hit “enter,” that data is stored in cloud logs and could be reviewed by human contractors working for the AI company. Stick to your secure banking app for the math.
2. Proprietary Source Code
For tech entrepreneurs, your code is your “secret sauce.” While AI is amazing at finding bugs, uploading your proprietary code can be a massive mistake.
https://greyjournal.net/work/work-business/why-every-startup-needs-a-multi-currency-business-account/Remember the big Samsung leak? Their engineers used a chatbot to fix errors in their source code, and that top-secret data ended up in the AI’s database. If your code is what makes your product unique, keep it away from public models to protect your intellectual property.
3. Passwords and Login Details
This might seem obvious, but it happens more than you’d think. Never use a chatbot to store your passwords or help you generate “strong” passwords for your actual accounts.
Chatbots aren’t password managers. If your AI account ever gets hacked, a bad actor could see every login secret you’ve ever typed into a prompt. Use a dedicated, encrypted password manager instead—it’s much safer.
4. “Stealth Mode” Plans and Roadmaps
Are you working on a secret project or a product launch that hasn’t been announced yet? Don’t brainstorm the details with a public AI.
There have been cases where entrepreneurs asked an AI about their “stealth” projects, only to have the AI later describe those exact projects to other people who asked the right questions. If your competitive edge depends on a secret roadmap, keep those plans in-house.
5. Personal Identity Info (PII)
Your Social Security number, home address, phone number, and passport details are the keys to your identity. Fraudsters love this data because they can use it for identity theft or targeted phishing scams.
Public AI systems aren’t designed to keep you anonymous. Even if you think a detail is small, hackers can piece together “breadcrumbs” from different prompts to build a full profile of you.
6. Trade Secrets and Internal Meeting Notes
If it belongs behind a Non-Disclosure Agreement (NDA), it doesn’t belong in a chatbot. This includes customer lists, manufacturing processes, or notes from private board meetings.
Using AI to summarize a recording of a sensitive meeting is a huge risk. If those notes contain information that gives you a leg up on the competition, sharing them with an AI could legally count as “abandoning” your trade secret, making it impossible to protect in court later.
7. Medical Records and Health Data
It’s easy to ask an AI to explain a lab result or a symptom, but health data is highly personal and strictly regulated.
Most consumer AI apps aren’t bound by healthcare privacy laws like HIPAA. That means your medical history, prescriptions, or imaging files could be stored indefinitely and accessed by people you don’t know. For anything health-related, talk to a real doctor or use a secure, medical-grade platform.
Shared something already? Here’s the fix.
If you’ve already shared some of this info, don’t panic—but do act fast.
- Turn off “Training”: Go into your settings (in ChatGPT, Gemini, or Claude) and find the “Data Control” or “Activity” section. Toggle off the option that lets them use your chats to train the model.
- Delete your history: Manually delete the specific chats that contain sensitive info. Just keep in mind that companies often keep a backup for about 30 days for safety reasons before it’s gone for good.
- Go Enterprise: If your team uses AI for work, get an “Enterprise” or “Business” account. These versions usually come with a guarantee that your data will not be used for training by default.
AI is a tool, not a confidant. Use it for the boring stuff—like drafting emails or summarizing public research—and keep your secrets to yourself. Always work smart but with caution!
