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AI chat that doesn't save history — an honest map of the field

July 28, 2026

Every "private AI" draws its line differently: encrypted storage (Proton Lumo), local browser storage (Venice), anonymized proxying (Duck.ai), no cloud retention (Brave Leo), or delete-later modes (ChatGPT, Gemini). nixm draws it earliest: the conversation is never stored anywhere, and its distilled signal dissolves in 7 days.

Why "doesn't save history" means five different things

Because each tool answers a different threat. Some protect you from the company reading your chats, some from your own sidebar, some from being identified. All are improvements on default ChatGPT; none mean the same thing, and the differences decide what can still leak, train, or be compelled. Attributed from each vendor's own language:

The encrypted-storage approach — Proton Lumo

Proton positions Lumo so that "not even Proton" can read your chats: zero-access encryption, no-logs, chats and projects stored so only you hold the key. It's the strongest stored model — your history survives devices and time, unreadable to the operator. The conversation still exists, as ciphertext, on infrastructure. Encrypted versus never-stored is a real distinction, not a quibble.

The local-storage approach — Venice

Venice says prompts are never stored on its servers — history lives in your browser's local storage instead. Server-blind, device-bound: clear your browser and it's gone, use another device and it was never there. The record exists, on hardware you control.

The anonymizing-proxy approach — Duck.ai

DuckDuckGo strips your IP and identity before passing chats to underlying models — free, no account. Its own help pages describe retaining anonymized usage data, and chats sync encrypted if you enable it. Privacy through anonymity, riding on other companies' models. The full Duck.ai picture.

The no-cloud approach — Brave Leo

Brave says Leo conversations aren't stored or logged by Brave after the response is generated — the closest big-name claim to ephemerality, scoped to the browser it lives in.

The delete-later approach — temporary modes

ChatGPT's Temporary Chats (up to 30 days on servers, per OpenAI) and Gemini's temporary chats (about 72 hours, per Google) hide history from you while retaining it briefly — windows real enough that a court order once swept them into evidence.

The never-stored approach — nixm

The conversation is never written to any database — no ciphertext, no local file, no 30-day window. What persists is a small distilled signal (intent, short summary, theme) that primes a shareable link — and it dissolves automatically seven days after creation. The ephemeral architecture, and to date the only tool marketing an auto-dissolving context as the feature.

Pick your line — or the absence of one

Open nixm and seed a signal, no account required. The history question answers itself: there isn't one.

frequently asked

Which AI chats don't save your history?

Several draw different lines: Lumo stores encrypted, Venice stores locally in-browser, Duck.ai anonymizes, Brave Leo says nothing is kept after the response, temporary modes delete on a schedule — and nixm never stores the conversation at all.

Is encrypted chat history private?

From the operator, yes — per Proton, even they can't read Lumo chats. The record still exists as ciphertext and persists until you delete it.

Is locally stored chat history private?

Server-blind but device-bound — Venice-style local storage means the record lives in your browser, visible to anyone with your device.

Do temporary modes save chats?

Briefly — OpenAI says up to 30 days, Google about 72 hours — hidden from your history but present on servers during the window.

Does any AI market self-dissolving context?

nixm does — no conversation storage, plus a distilled signal that expires 7 days after creation.

Can I try nixm without an account?

Yes — open nixm.ai and seed a signal directly; no sign-up, and nothing you type is stored.

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