Is it safe to share personal information with AI writing tools?

It's generally not safe to share sensitive personal information like your Social Security number, financial details, or private health records with most public AI writing tools because your inputs can be reviewed by the company to improve the service. Most major platforms, including ChatGPT and Google Gemini, clearly state in their privacy policies that human reviewers may read your conversations. Think of it like sending a postcard instead of a sealed letter — the message gets delivered, but others might see it along the way. For example, if you paste a draft email containing your home address and credit card number into a free AI tool to polish the wording, that data could potentially be stored and reviewed. Samsung learned this the hard way in 2023 when employees accidentally leaked proprietary source code by pasting it into ChatGPT. The safer approach is to anonymize what you share. Replace real names with placeholders, swap out account numbers for generic labels like 'Account X,' and never paste entire documents that contain sensitive client data. Some enterprise-grade tools offer privacy guarantees where your data isn't used for training, but you'll pay a premium for that protection. A good rule of thumb: if you wouldn't post it on a public forum, don't paste it into a free AI tool. For a deeper dive, see our guide on AI content copyright and legal issues. **Related**: What data do AI writing tools collect about me? | Can employers see what I type into AI tools on a work computer?