AI Chat History: Retention, Export and Deletion

AI chat history is the record of your conversations with an assistant: your prompts, its answers, uploaded files and sometimes things it has been asked to remember. How long that history is kept, who can see it, whether it trains models and how you export or delete it differ a lot between services, and those details matter as soon as you paste anything about your work, clients or health into a chat.

This explainer covers what AI chat history usually contains, the difference between history, memory and training data, what European data protection rules give you, how to export and delete your chats, and a short checklist for choosing an assistant you can trust with your conversations.

What AI chat history contains

“Chat history” sounds simple, but it usually covers several kinds of data, each with its own retention rules.

Conversation text. Your prompts and the assistant’s replies.
Uploaded files. PDFs, documents, spreadsheets and images you attached.
Generated files. Images, documents or code the assistant created for you.
Memory. Facts the assistant was told to keep, such as “I work in accounting” or “always answer in Lithuanian”.
Project settings. Instructions and files attached to a project or workspace.
Usage and account data. Login times, plan, billing and technical logs.

When a service says “we delete your chats”, it is worth checking which of these it means. Deleting a conversation may not delete the files in it, a memory derived from it or a copy held in backups for a period.

History, memory and training: three different things

People often mix these up, and they have very different privacy consequences.

Concept	What it is	Who benefits	Key question to ask
Chat history	Stored copies of your conversations	You: you can scroll back and continue	How long is it kept, and can I delete it?
Memory	Facts the assistant keeps across chats	You: less repeating yourself	Can I see and edit what it remembers?
Training data	Conversations used to improve future models	The provider and future users	Are my chats used for training, and can I refuse?
Backups and logs	Technical copies for reliability and security	The provider’s operations	How long do they persist after I delete?

The most important line is between history and training. Keeping your history so you can use it is a feature. Using your history to train models means your content influences a system other people use. Our guide to AI training data opt-outs explains what those settings really mean.

How long AI services keep chats

Retention periods vary by provider, by plan and sometimes by setting. Common patterns include:

Unlimited history until you delete it, typical on paid plans.
Limited history, such as the last 30 days, often on free plans.
Temporary or incognito chats that are not saved to your history at all.
Retention after deletion, where deleted chats disappear from your view at once but remain in systems for a period for safety, legal or backup reasons.
Business and enterprise plans with configurable retention set by an administrator.

Do not assume. Read the provider’s privacy policy and help pages for the plan you actually use, and look for concrete periods rather than vague phrases such as “as long as necessary”.

What European data protection rules give you

If you are in the EU, or a service processes data of people in the EU, the General Data Protection Regulation applies to the personal data in your chat history. In plain terms, it gives you rights that are directly relevant:

Right of access: you can ask what personal data the provider holds about you.
Right to erasure: in many situations you can ask for your data to be deleted.
Right to data portability: you can receive data you provided in a usable format.
Right to object and to restrict processing in certain cases.
Storage limitation: data should not be kept longer than needed for its purpose.

The European Commission’s overview of EU data protection rules is a readable starting point. Where your data is stored also matters for which rules apply in practice; see our article on EU-hosted AI and GDPR.

When you use AI at work

Chats about customers, employees or patients usually contain other people’s personal data. Then your company is responsible for how that data is handled, and the AI provider typically acts as a processor. That is a reason to agree internal rules and, for business plans, to check the provider’s data processing terms.

How to export your AI chat history

Exporting is useful before you switch tools, for your own records, or to check what a service actually stores.

Look in the account or privacy settings for “export”, “download your data” or similar.
Check what the export includes: conversations only, or files and memory too.
Note the format. Common formats such as JSON, HTML or plain text are easy to search and archive.
Store the export securely. It may contain everything you ever told the assistant.

If no self-service export exists, you can usually request your data from the provider under your access and portability rights.

How to delete chats, memory and your account

Single conversations

Most assistants let you delete individual chats from the sidebar or menu. Do this for any conversation that contained something sensitive you should not have pasted.

Memory

Check the memory or personalisation settings separately. Deleting a chat may not remove facts the assistant learned from it. Good assistants show you what they remember and let you remove individual items.

Files and projects

Uploaded files may live in a project or file store independent of the chat. Delete them there as well.

Your whole account

If you stop using a service, delete the account rather than just abandoning it. Look for a dedicated deletion page or contact the provider. Ask what happens to backups and how long deletion takes to complete.

Good habits for sensitive chats

Do not paste what you would not e-mail to a stranger: passwords, ID numbers, full card numbers, health records. Our list of what not to share with AI covers the categories.
Anonymise first. Replace names and identifiers with placeholders before pasting customer or employee data.
Use projects deliberately. Keep client work in separate projects so you can delete one client’s material cleanly.
Review memory now and then. Remove anything outdated or too personal.
Clean up after one-off tasks. Delete chats that contained sensitive content once the job is done.

Chat history at work: rules for teams

When a whole team uses an assistant, AI chat history stops being a personal matter. Conversations may contain client names, contract terms, salary discussions or code. A few simple team rules prevent most problems.

Decide what belongs in shared projects

Shared projects are convenient: everyone sees the same instructions, files and conversations. That is also the risk. Agree which kinds of material may go into a shared project and which must stay in a personal chat or out of AI tools altogether, such as HR cases or confidential negotiations.

Name an owner for each project

Someone should be responsible for cleaning up a project when a client relationship ends or a piece of work is finished. Without an owner, old material simply accumulates.

Plan for people leaving

When an employee leaves, decide what happens to their chats and to any shared material they created. Export what the company needs, then remove their access. Check the provider’s documentation for how accounts and seats can be reassigned.

Write it down

Put these rules in your AI use policy, next to the list of data that must never be pasted into a chat. Our guide on writing a company AI use policy includes a template you can adapt.

Review once a quarter

A short quarterly review of projects, memory items and connected accounts keeps the history useful and limits what would be exposed if an account were ever compromised.

A checklist for choosing an assistant

Are chats used to train models? Can you refuse, and is that the default?
How long is history kept on your plan?
Can you export your chats, files and memory?
Can you delete chats, memory, files and the account yourself?
Where are the servers, and which country’s law applies?
Can you see and edit what the assistant remembers?
For teams: who can see shared projects, and can an admin set retention?

Our broader AI privacy checklist for business adds questions about contracts, sub-processors and security.

Chat history in Ask Mio

Here is how Ask Mio handles these questions, as stated on its site and in its privacy policy:

Not used for training. Your chats and files are not used to train models.
Yours to export or delete. According to the privacy policy, you can export or delete your data at any time from Settings or by writing to the support address, and the site has a dedicated page for deleting your data or account.
EU servers. Ask Mio runs on servers in the EU, in Germany.
History by plan. The Free plan keeps 30 days of history; the paid plans, Chat, Coding, Design and Business, keep unlimited history.
Visible memory. When you say “remember that…”, Mio keeps it, and you can see and control everything it remembers.
Document memory. An optional feature keeps uploaded files searchable in later chats, so Mio can quote the right paragraph without you attaching the file again. You can switch it on or off for your account.

Where another service may fit better: if your organisation needs administrator-defined retention policies, audit logs or a self-hosted deployment, look for an enterprise offering built around those controls.

Frequently Asked Questions

How long do AI assistants keep my chat history?

It depends on the provider and your plan. Some keep history until you delete it, some limit free plans to a period such as 30 days, and many keep deleted data in backups or logs for a while longer. Check the privacy policy and help pages for your specific plan, and look for concrete periods. On Ask Mio, the Free plan keeps 30 days and paid plans keep unlimited history.

Is my AI chat history used to train models?

Some services use conversations to improve their models by default, some only with your permission and some never. The setting is often separate from whether history is saved. Read the provider’s policy and check your account settings. Ask Mio states that chats and files are not used to train models.

Does deleting a chat delete everything?

Not always. Deleting a conversation removes it from your view, but files you uploaded, memory items learned from it and backup copies may follow different rules. Delete files and memory items separately, and check the provider’s policy for how long deleted data remains in backups before it is fully removed.

Can I get a copy of my AI chat history?

Most assistants offer an export in their settings, and under the GDPR you can also request access to your personal data and a portable copy of data you provided. Check what the export includes, such as conversations, files and memory, and store it securely, because it may contain everything you have ever told the assistant.

What is the difference between chat history and AI memory?

Chat history is the stored record of your conversations. Memory is a smaller set of facts the assistant keeps across chats, such as your role or language preferences, so you do not have to repeat them. They are often managed separately: deleting a chat may not remove a memory item. Good assistants let you view and delete memory items one by one.

The Bottom Line

AI chat history is useful because it lets you pick up where you left off, but it is also a detailed record of what you shared. Know how long your provider keeps it, whether it trains models, and how to export and delete chats, memory and files. Keep sensitive data out of prompts, anonymise where you can and clean up after one-off tasks. To see how Ask Mio handles history on each plan, compare the plans or start on the free plan.

AI Chat History: Retention, Export and Deletion Explained