WellWired Journal
Is Claude AI Safe? A Plain English Guide
Claude is safe for everyday tasks like writing letters and asking questions. Here is what to keep private and the one setting worth changing.
Quick Summary: Claude is safe for everyday tasks such as writing letters, asking questions, and planning activities. Anthropic, the company that makes Claude, encrypts your data and limits staff access to your conversations. The main risk is sharing private information you should not, such as passwords, bank details, or NHS numbers. Keep those out of the chat, change one setting in your account, and most people have nothing to worry about.
Perhaps you heard about Claude on the radio, or a family member mentioned it. Perhaps you tried it once and are now wondering how much to trust it with your questions.
The honest answer is: quite a lot, for most everyday things. Here is what you need to know.
Is Claude Safe for Everyday Use?
Yes, for most things. Claude works well for writing letters, drafting emails, asking questions about health or travel, getting help with recipes, and reading long documents you'd like summarised. Anthropic, the company behind Claude, was founded specifically to research how to make AI safer. That gives it a different character from some competitors.
The risks fall into two categories: sharing information you should not share, and trusting answers you should not trust without checking. Both are manageable once you know what to watch for.
At WellWired we have used Claude for drafting guides and summarising long documents. Having read Anthropic's privacy policy directly, we found the rules are clear and more transparent than many online services. The key things to understand are what they store and who can access it.
What Does Anthropic Do With Your Conversations?
When you type a message into Claude, Anthropic receives and stores it on their servers. On the free and consumer paid plans, those conversations can be used to improve future versions of Claude unless you opt out.
This is how many online services work, but it involves more detail than most people expect. Every message you type, and every reply Claude gives, is held on Anthropic's servers. It is not stored only on your device.
According to Anthropic's data protection guidance, staff cannot access your conversations as a matter of routine. Access is restricted to designated team members dealing with safety or legal matters, and it is logged. The system uses encryption to protect your data both while it travels and while it is stored.
On retention: if you have a free or Pro account and you have opted in to training (which is the default), Anthropic keeps your conversations for up to five years. If you opt out, they keep them for 30 days for technical purposes, then delete them. The Claude Help Centre explains what employees can and cannot see in plain terms.
What Should You Never Type Into Claude?
The same things you would not send in an email to a stranger.
- Passwords or security codes. No AI tool needs these for any legitimate reason.
- Bank or card details. Account numbers, sort codes, PINs.
- Your NHS number or National Insurance number. These are sensitive identifiers that cannot easily be changed if misused.
- Passport or driving licence numbers. Treat these like bank details.
- Other people's private information. Do not paste personal details about family members without their knowledge.
Claude does not ask for any of these things. If someone contacts you claiming to be Claude and requesting sensitive personal information, that is a scam. See our guide on staying safe when using AI tools for more on this.
For a wider list of what to avoid sharing with any AI tool, our guide on what not to share with any AI covers the main categories in detail.
Can You Stop Claude From Using Your Conversations?
Yes. In your Claude account, go to Settings and look for Privacy. There you will find a toggle to turn off training. Once switched off, Anthropic will no longer use your future conversations to improve the AI. Your messages are still held temporarily for 30 days, then deleted.
If you are on a Claude Team or Enterprise plan, training is switched off by default. You do not need to change anything.
You can also delete your conversation history at any time. Open a previous chat, click the options menu, and select delete. You can export all your data as a file if you would like a copy.
Is Claude Safe to Use in the UK?
Claude is available to UK users, and UK data protection law applies to how your information is handled. The UK General Data Protection Regulation, or UK GDPR, gives you rights over your personal data, including the right to ask what is held about you and the right to have it deleted.
The Information Commissioner's Office (ICO) is the UK's data protection regulator. It has been active in assessing AI services and their compliance with UK law. You can read the ICO's guidance on AI chatbots to understand your rights in more detail. It covers ChatGPT specifically, but the principles apply to Claude too.
Anthropic is a US company, so your data is processed on US servers. Transfers of personal data outside the UK require appropriate safeguards under UK GDPR, which Anthropic addresses through standard contractual clauses. The details are in their privacy policy.
How Does Claude Compare to ChatGPT for Safety?
Both Claude and ChatGPT are broadly safe for everyday use. The differences are in their privacy defaults and the company behind them.
Anthropic, which makes Claude, describes safety as its founding mission. It developed something called Constitutional AI, a method that trains Claude to evaluate its own responses against a set of principles before replying. This means Claude has built-in reasoning about what is and is not appropriate to say.
OpenAI, which makes ChatGPT, has similar safety measures but a different history and emphasis. Practically speaking, both tools handle your data in comparable ways on consumer plans: each lets you opt out of training, and each encrypts your conversations.
If privacy is a particular concern, read our ChatGPT safety guide alongside this one and compare how each handles the specific things that matter to you. The differences at consumer level are smaller than the headlines often suggest.
Is Claude Safe on a Shared Tablet or Computer?
This is one of the more practical questions, and it matters. Sharing a tablet or computer with a partner, family member, or anyone else means the main risk is not Claude itself but your account staying logged in.
Leaving Claude open on a shared screen lets the next person read your conversations. They cannot reach Anthropic's servers, but what is on the screen is visible to anyone nearby.
Simple steps to protect yourself on a shared device:
- Sign out of Claude after each session. There is a sign-out option in the menu at the top right.
- Do not save your Claude password in the device's browser if others have access to it.
- Delete any conversations you would rather not leave visible before you close the browser.
- If someone else in the house uses the same browser, consider using a private browsing window when you open Claude.
Our staying safe with AI guide has more practical tips on using AI tools on shared and personal devices.
FAQ
Is Claude free to use?
There is a free version of Claude with daily usage limits. Claude Pro costs around £17 per month and removes those limits. You do not need to pay to try it and judge whether it suits you.
Can Anthropic staff read my conversations?
Not as a matter of routine. Staff access is restricted to specific circumstances, such as reviewing flagged content or responding to legal requirements. Access is logged and controlled. Anthropic publishes details of this in their privacy guidance.
Does Claude save my messages?
Yes. Your messages are stored on Anthropic's servers. On the free and Pro plans they are kept for up to five years by default (if you have opted in to training) or 30 days if you have opted out. You can delete individual conversations at any time from within your account.
Is Claude safer than ChatGPT?
Comparable, for everyday consumer use. Both tools store your conversations on their servers and let you opt out of training. Anthropic's founding focus on safety research is a meaningful point in Claude's favour, though the day-to-day experience is similar.
Can I ask Claude about health questions?
With one caveat. Claude can explain medical terms, summarise health information, or help you write down your symptoms before a GP appointment. It cannot replace a doctor's judgement. Treat its health answers the way you would advice from a well-informed friend: useful for context, not a substitute for professional care.
What should I use Claude for?
Claude works particularly well for writing and rewriting: letters, emails, complaint forms, and birthday messages. It is also good at summarising long documents and explaining confusing text in plain English. Brainstorming ideas is another one. These are low-risk tasks where the main benefit is simply saving time.
Is Claude private?
Your conversations are not private in the way a private phone call is. They are stored on Anthropic's servers and can be accessed by staff in specific circumstances. You can reduce what is retained by opting out of training in your account settings. Do not share anything you would be uncomfortable with a company holding on record.
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