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Private AI chat — no account, and as little kept as possible

October 26, 2026

Private AI chat exists, but "private" means different things. No account means nothing ties the chat to your identity. No stored history means there is nothing to find later. Duck.ai and Brave Leo work without an account, and nixm does too, with the stronger pairing: no transcript is kept. What nixm keeps is a distilled working log and the intent of the session. It dissolves seven days after the signal is created, along with any images you uploaded.

Why the account matters

An account is a join key. Every stored conversation attached to it becomes part of one record: your questions across months, gathered under your email, and searchable, breachable or subject to a legal request. The OpenAI litigation made that concrete. A court ordered a 20-million-conversation sample of consumer chats produced, as covered in the NYT v. OpenAI explainer. Remove the account and whatever does exist cannot easily be assembled into a picture of you.

Who offers AI chat without an account

Duck.ai (DuckDuckGo). Free, no account. It proxies your requests so the model providers do not see your IP address. Per DuckDuckGo, the providers have agreed not to train on the conversations, and chats are removed within 30 days. Detail is in is DuckDuckGo AI chat anonymous.

Brave Leo. No account needed on the free tier. Per Brave, conversations are not kept after a response is returned, and any history lives on your own device.

nixm. Open the page and start. There is no email, no login and nothing to set up. Details below.

Lumo, from Proton, is often mentioned alongside these. It needs an account, but it encrypts saved chats so that Proton says it cannot read them, which covers the encryption kind of private rather than the no-account kind. How all of them compare on retention is in what each AI chatbot keeps. For pictures rather than text, see free AI image generators with no sign-up.

Why no account is not the whole answer

A conversation without an account can still be stored, and what you type can identify you on its own. The situation, the names, the specifics of your job or your family can all do it. An anonymous record is still a record. The pairing that closes the gap is no account and as little stored as possible, for as short a time as possible. How that works as a design is in what ephemeral AI chat is.

What nixm keeps, stated plainly

Here it is without the marketing.

No account needed. A signal you start without signing in belongs to no one. It is not linked to any identity.

No transcript. The full conversation is not stored.

What does persist is the signal. That is a distilled working log of the session and its intent, which is what lets you come back to the same link and carry on. Any images you upload are kept with the signal as references while it lives. All of it dissolves automatically seven days after the signal is created, and then nothing remains.

An account is optional. It exists for credits and ownership. Signing in does not add a stored transcript.

That is not "nothing, ever." It is a short, bounded footprint with a fixed end date and no identity attached, which is a very different thing from a history that lasts until you remember to delete it. Compare it with the default most people type into, in does ChatGPT save your conversations.

The three-question checklist

For any AI that calls itself private, ask three questions:

  • Does it know who I am? That comes down to the account and your IP address.
  • What persists, and for how long? Look for a specific number, not "as long as necessary".
  • Is it used for training? Check the default, not just whether an opt-out exists.

Duck.ai answers no, for up to 30 days, and no. A typical account-based chatbot answers yes, until you delete it, and often yes by default. nixm answers no, a distilled log for seven days, and no.

Skip the sign-up

Open nixm and seed a signal. There is no email and no account, and nothing is left after seven days.

frequently asked

Can I use AI chat without creating an account?

Yes. Duck.ai, Brave Leo and nixm all work without sign-up, so no email or identity is attached to the session.

What is the most private AI chat?

It depends which kind of private you need: no account, no stored history, no training or encryption. Duck.ai and Brave Leo avoid accounts, Lumo encrypts saved chats, and nixm pairs no account with no stored transcript and a seven-day limit on everything else.

Is no-account AI chat fully anonymous?

Identity-wise, largely yes. But what you type can still identify you if it is stored, so the stronger pairing is no account plus as little kept as possible.

Does nixm store my conversation?

Not the full conversation. The signal keeps a distilled working log of the session and its intent, plus any images you upload, and all of it dissolves seven days after the signal is created.

Do nixm signals require sign-in?

No. A signal started without signing in belongs to no one and is not linked to any identity. An optional account adds credits and ownership, not a stored transcript.

Does private AI chat use my data for training?

It varies. DuckDuckGo says its model providers have agreed not to train on Duck.ai chats, and Brave says Leo does not keep conversations. nixm does not train on conversations. Account-based chatbots often train by default unless you opt out.

Can I try nixm without an account?

Yes. Open nixm.ai and seed a signal, with no sign-up needed.

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