ChatGPT vs. Private AI: What Each Platform Logs and What to Use Instead
People worry about AI privacy, then paste in medical details, client names, source code, and financial notes anyway. That gap is the risk.
This guide lays out what major AI platforms keep, how long they keep it, who can reach it, and what to use instead.
Bottom line upfront: If the prompt is sensitive, do not use cloud AI. Run a local model. See How to Run AI Privately: Local LLMs.
What Major AI Platforms Collect
| Platform | Jurisdiction | Default retention | Trains on your data? | Human review? | Gov requests? |
|---|---|---|---|---|---|
| ChatGPT (free) | US | Indefinite (opt-out available) | Yes (opt-out) | Yes | Yes, complies |
| ChatGPT Plus | US | 30 days minimum | No (by default) | Yes | Yes, complies |
| ChatGPT Enterprise | US | Contractual | No | No | Yes, complies |
| Google Gemini | US | 18 months (reducible) | Yes (some) | Yes | Yes, complies |
| Claude (Anthropic) | US | 90 days | Safety research | Yes (safety) | Yes, complies |
| Grok (xAI) | US | Varies | Yes | Unknown | Yes, complies |
| Mistral Le Chat | France (EU) | 30 days | No (by default) | Limited | GDPR-constrained |
| Ollama (local) | Your device | None | No | No | Not applicable |
US-based AI companies can receive secret legal orders. If you send sensitive prompts to a US cloud AI service, assume the data can be reached under lawful process.
What These Platforms Actually Log
ChatGPT
OpenAI can keep your conversation history, account details, IP address, device data, usage patterns, and browser metadataData about data, such as who contacted whom, when, from what device, and from which location. Metadata often remains exposed even when content is encrypted.Glossary →. Free chats may train future models unless you opt out. Human reviewers may read some conversations for safety work. If you use ChatGPT for sensitive material, you are trusting OpenAI to store it, secure it, and answer for it later.
Google Gemini
Gemini sits inside your Google account. Conversations are linked to that account and stored on Google's systems. Default retention can last 18 months. Google also says human reviewers may process some chats. If you already try to limit what Google knows about you, Gemini adds more to that pile.
Claude (Anthropic)
Anthropic says consumer conversations may be kept for up to 90 days and may be reviewed for safety research. Anthropic is US-based, so the same legal pressure applies here too. API users usually get better contractual terms than consumer users.
Mistral Le Chat
Mistral is one of the better cloud options on privacy. It sits under French law, keeps data for a shorter period, and does not train on user chats by default. That is better. It is still cloud AI. Sensitive work still belongs on your own machine.
Private Alternatives by Use Case
| Use case | Private option | Privacy level | Capability trade-off |
|---|---|---|---|
| General queries (sensitive) | Ollama + Llama 3 8B (local) | Maximum | Slower, less capable than GPT-4 |
| Code assistance | Ollama + Codestral (local) | Maximum | Very capable for code |
| Document analysis | LMStudio + local model | Maximum | Good for analysis tasks |
| Cloud with lower risk | Mistral Le Chat (EU) | High (but still cloud) | Competitive with GPT-3.5 |
| Anonymous cloud access | Any provider + TorThe Tor network uses onion routing to obscure IP addresses and browsing paths by relaying traffic through multiple volunteer-run nodes.Glossary →/Mullvad + temp account | Medium | Cuts the identity link, not the logging risk |
Setting Up Local AI in 10 Minutes
ollama pull mistral for a small general model or ollama pull llama3 for Meta's Llama 3 8B. A 16GB RAM laptop can handle Mistral. A GPU makes everything feel better.docker run -d -p 3000:80 ghcr.io/open-webui/open-webui.For the full local LLM setup guide, including hardware notes and model picks, see How to Run AI Privately: Local LLMs and Anonymous Inference.
Protecting Yourself When You Must Use Cloud AI
- Do not enter identifying information: Real names, addresses, account numbers, client details, source identities
- Use Tor or Mullvad: This helps keep your IP from being tied to the query
- Use a throwaway account: Create it over Tor, with no real email, on a device not tied to you
- Turn history off: Use the privacy settings every service gives you, even if they are not perfect
- Prefer EU providers if you must go remote: Services like Mistral face stricter rules than US providers
Cunicula is editorially independent and receives no funding from any AI company. Not financial advice. Affiliate disclosure.
Follow the Money
Your prompts help fund training pipelines worth billions. A local model keeps that value and that data on your own machine.
- OpenAI
- Backed by Microsoft. Prompts are product input as much as user activity. The more people feed it, the more valuable the system gets.
- Anthropic
- Backed by Amazon and Google. Same basic incentive. User prompts help improve the product and justify more infrastructure spend.
- Meta AI
- Funded inside Meta. Fits into a wider ad business built on user data and engagement.
- Local models
- Ollama and llama.cpp run on your own hardware. No outside investor gets your prompts. No cloud platform gets the logs.
Frequently Asked Questions
Does ChatGPT store my conversations?
Yes. ChatGPT stores conversations by default. Free chats may be used for training unless you opt out in Settings → Data Controls. Temporary Chat avoids saved history, but OpenAI still keeps data for up to 30 days for safety review. Business plans get stronger defaults, but OpenAI can still respond to lawful government requests.
What does Google Gemini do with my conversations?
Gemini ties conversations to your Google Account. Default retention can run up to 18 months, though some settings shorten it. Google says human reviewers may read some chats. Because Gemini sits inside Google's wider account system, many users will not want sensitive prompts there at all.
Which AI model is most private for cloud use?
Among big cloud options, Mistral's Le Chat is one of the less invasive choices: EU jurisdiction, shorter retention, no ad business, and no training on user chats by default. It is still cloud AI. For real privacy, keep the model on your own hardware.
Can I run AI completely privately without any data leaving my device?
Yes. Ollama is one of the easiest ways to run open models locally. Your prompts and outputs stay on your machine during inference. With enough RAM or a decent GPU, local models are fast enough for many everyday tasks. See our guide: How to Run AI Privately: Local LLMs.
Can AI companies be compelled to hand over my conversations to law enforcement?
Yes. Cloud AI companies can be forced to hand over stored data through subpoenas and other legal orders. If the service keeps your chats, those chats can be reached. Local models avoid that problem because there is no provider holding the conversation history.