Best Private AI Chatbots in 2026: 8 Compared on What They Keep
Short answer: for free chat with no account, Duck.ai and Brave Leo keep the least about you. For encryption you can verify rather than trust, Maple AI and PPQ.ai run chats inside attested hardware enclaves. For uncensored models, Monero and Tor without an email, look at Obscurify.ai, NanoGPT, PPQ.ai and Venice AI. If nothing may leave your computer, run a model locally.
Disclosure: written by Obscurify.ai, one of the services compared. We’ve tried to be fair, including where others are stronger. Every claim about another service links to that service’s own page, checked on 2026-11-06. Corrections with a source are welcome at contact@obscurify.ai.
“Private” covers very different promises, from “we delete your chats after 30 days” to “the server can’t read your chats at all”. This page compares eight chatbots that make privacy their main pitch, on the questions that decide what actually happens to a conversation. For the wider feature table (payments, Tor, model lists), see our private AI chat comparison.
What makes an AI chatbot private?
A chatbot is private when as few parties as possible keep what you type, and when nothing links it to you. Four questions cover it:
- Does the service keep your chats on its servers? Many keep history on your device instead.
- Does the company that runs the model keep or train on them? A service can promise not to store chats and still send them to a model company that does. Look for zero-data-retention (ZDR) terms.
- What ties a chat to you? An email, phone number, card, IP address or a login all can.
- Can you check the promise? Open-source code, trusted execution environments (TEEs) with remote attestation, and end-to-end encryption (E2EE) replace “trust us” with something you can verify. Most services, ours included, still rely on policy.
No service scores perfectly on all four. The table shows the trade-offs.
Which private AI chatbot is best for what you need?
- Free, no account, well-known models: Duck.ai. Free with a daily limit, and its model providers agree to delete prompts after each reply.
- You already use the Brave browser: Brave Leo. No account, history stays on your device.
- Encryption you can verify: Maple AI. End-to-end encrypted, with an open-source enclave. It needs an account and runs open models only.
- Open source from an established privacy company: Proton Lumo. Open-source apps, models on Proton’s own servers, guest mode over Tor.
- Pay per message, no account, crypto: PPQ.ai or NanoGPT. Both take Monero and work from a prepaid balance.
- Images, video and uncensored models: Venice AI. The widest media catalogue of the group.
- An account with no email, Monero, Tor, and Claude, GPT or Gemini on zero-data-retention routes: Obscurify.ai. Weak spots are listed below.
- Nothing leaves your machine: a local model (see the FAQ).
How do the private AI chatbots compare?
Checked 2026-11-06 on each service’s own pages. “Not stated” means we couldn’t find it there, not that it’s missing.
| Chatbot | Chat with no account | Keeps your chats on its servers? | Model companies | Verifiable (TEE / E2EE) | Open source | Monero | Main paid plan |
|---|---|---|---|---|---|---|---|
| Duck.ai | Yes, free, daily limit | No by default; optional encrypted Sync & Backup | Agree to delete after the reply; may cache up to 1 hour in memory | TEE for 2 open models (via Tinfoil) | Browsers yes; Duck.ai not stated | Not stated | Plus $9.99/mo (bundle) |
| Brave Leo | Yes, inside Brave | No; large prompts cached for minutes | Brave says it hosts the models on its own infrastructure | Not stated | Browser yes; Leo server not stated | Not stated | Premium $14.99/mo |
| Proton Lumo | Yes, guest (works over Tor) | No logs; account history synced with zero-access encryption | Open models on Proton’s own servers | Zero-access encrypted history; no attestation stated | Yes (apps) | Not stated (Bitcoin yes) | Plus $12.99/mo, $9.99 yearly |
| Maple AI | No (an “Anonymous” sign-up exists) | Yes, end-to-end encrypted with your key | Open models in an attested enclave | Yes (AWS Nitro) | Yes | Not stated (Bitcoin yes) | Pro $20/mo |
| PPQ.ai | Yes, prepaid from $0.10 | Prompts not stored; history in your browser | Depends on the model’s tier; some may keep prompts | Chat requests run in an AWS Nitro Enclave | Enclave code yes | Yes | Pay per use |
| NanoGPT | Yes, prepaid | Not by default; history in your browser | Providers’ own policies; ZDR “best effort” | Some models tagged TEE | Not stated | Yes | $12/mo or pay as you go |
| Venice AI | Yes (limits not stated) | No; history on your device | Default mode: ZDR by contract. GPT, Claude, Gemini: “assume the provider is storing your content” | TEE and E2EE on Pro | Not stated | Not stated | Pro $18/mo |
| Obscurify.ai | Yes, guest (Llama 3.3 70B, 30 messages/hour) | Not saved; held in memory up to 1 hour, then deleted; history in your browser | Zero-data-retention routes only, under providers’ published policies (no signed agreements) | No | Web client yes (GPL); server no | Yes | Pay as you go $0; Casual $20; Pro $45 |
How do ChatGPT, Claude and Gemini compare?
They keep far more by default, which is why people look for the services above:
- ChatGPT: saved chats stay in your account until you delete them, then are deleted within 30 days. Temporary chats may be kept up to 30 days. (OpenAI)
- Claude: if you allow training, chats may be kept up to 5 years; otherwise 30 days after you delete them. Sign-up needs a phone number. (Anthropic)
- Gemini: activity auto-deletes after 18 months by default, and chats picked for human review are kept up to 3 years. (Google)
The details are in AI chat that doesn’t store your conversations.
What does each chatbot promise?
Duck.ai. “By default, Duck.ai does not record or store any of your chats”, and DuckDuckGo removes your IP address before a prompt reaches the model company. Providers agree to zero data retention, though OpenAI and Anthropic may hold chats “in short-term memory for up to 1 hour”. Free models include Claude Haiku 5.5 and GPT-6 Luna. (privacy, models)
Brave Leo. “We don’t store or retain prompts, responses, context, or personal data on our servers.” Free use needs no account; Premium uses unlinkable tokens, so the email isn’t tied to your chats. It only runs inside the Brave browser. (Brave privacy, Leo)
Proton Lumo. After a reply, “the data is erased”, and guest chats are erased when the session ends. Its models are open-weight (Qwen, GLM and others), not GPT or Claude. (Lumo privacy)
Maple AI. Each account has its own key that encrypts chats and replies, inside an AWS Nitro Enclave running open-source code. That’s the strongest technical guarantee here, at the cost of an account and a 25-message weekly free tier. (proof, pricing)
PPQ.ai. “No registration required.” Since September 2026 every chat request runs inside an AWS Nitro Enclave that PPQ’s own staff can’t read. What the model company keeps depends on the model’s tier. (privacy)
NanoGPT. Works “fully without an email or account”, keeps history in your browser, and Monero is its most used payment method. Its policy says retention by providers is outside its control. (privacy guide, privacy policy)
Venice AI. Venice doesn’t store prompts or replies, and history stays on your device. Its privacy policy allows cookies and pixels from analytics and advertising partners. Free accounts need an email, a social login or a crypto wallet. (privacy modes, privacy policy)
Obscurify.ai. An account is a random 16-digit number, with no email or phone. Payments become blind-signed vouchers (how that works), and the site runs as a Tor onion service (ChatGPT over Tor). Plans are on the pricing page.
Where does Obscurify.ai fall short?
- Closed-source server. Only the web client is open (GPL). You trust our policy, not code you can audit.
- No TEE or end-to-end encryption. Maple, PPQ.ai, Venice Pro and Duck.ai (on two models) offer hardware-backed guarantees we don’t.
- Model companies see the prompt text. They don’t see who sent it, and text requests only use zero-data-retention routes, but those rest on the providers’ published policies. We have no signed agreements; Duck.ai and Venice say they have contracts.
- Uncensored models are on Pro ($45 a month). NanoGPT, PPQ.ai and Venice offer them for less.
- No images or video. Venice, NanoGPT and PPQ.ai do both.
How we checked
We read each service’s privacy policy, help center and pricing pages on 2026-11-06, logged out, without signing up or paying. Services change often, so check the linked page before relying on a cell.
Frequently asked questions
Which AI chatbot is the most private?
There’s no single winner. For a verifiable guarantee, Maple AI (end-to-end encrypted, attested enclave) is strongest, but it needs an account. For leaving the least trail with no account, Duck.ai, Brave Leo and Lumo’s guest mode come first. For no-email paid accounts with crypto, compare NanoGPT, PPQ.ai and Obscurify.ai.
Is there a private AI chatbot with no account?
Yes. Duck.ai, Brave Leo (in Brave), Proton Lumo’s guest mode, Venice and Obscurify.ai’s guest chat all work without an account. PPQ.ai and NanoGPT work without one from a prepaid balance. Maple AI requires an account. See AI chat with no login.
Is ChatGPT private if I turn off training?
Less than it sounds. Turning off training stops OpenAI using your chats to improve models, but saved chats stay in your account until you delete them, and temporary chats may be kept up to 30 days. A phone number and email still tie them to you.
Are local AI models more private than any chatbot?
Yes, if they run fully on your device: nothing is sent anywhere. The trade-off is smaller, weaker models and a capable computer. Obscurify.ai’s Local Mode runs small models in the browser; desktop apps like Ollama run bigger ones.
Is Obscurify.ai open source?
Partly. The browser client is open source under the GPL; the server is closed. Its retention promises are in the privacy policy, and a signed warrant canary is updated monthly.