Infrastructure · October 2026
Private AI assistants
Mainstream AI assistants tie every conversation to an account, and usually to a phone number and a card. A private AI service breaks that link: some need no login at all, some accept crypto, some state that prompts are not stored or used for training, and some run in a way that prevents the operator from reading them.
See all 10 ranked ↓3 of 10 match
Private AI, ranked by Safety grade
Filter by feature 2 active
| # | Service | KYC | Privacy | Safety | Evidence | Accepts | Incidents |
|---|---|---|---|---|---|---|---|
| 01 |  Lumo No account needed Open source Proton's AI assistant with zero-access encrypted chat history and guest access | Never KYC 0 | 8.4 | 6.3 | Docs reviewed | ||
| 02 |  Routstr No account needed Open source Open protocol for pay-per-request AI inference paid with Cashu ecash and Lightning | Never KYC 0 | 8.6 | 6.1 | Docs reviewed | BTC | |
| 03 |  Brave Leo No account needed Open source AI assistant built into the Brave browser; no account or login for free use | Never KYC 0 | 8.4 | 5.8 | Docs reviewed |
Criteria
What we check for every AI service
- Whether an account, email or phone number is needed
- What the provider says about storing and training on prompts
- Whether the privacy claim is enforced by design or only by policy
- Payment options, including crypto
Questions
Private AI: common questions
What makes an AI service private?
Three separate things: not needing an identity to use it, not keeping your prompts, and not being able to read them in the first place. Few services offer all three. Each listing says which apply.
Can I use AI without logging in?
Yes. Several services offer chat with no account. The listings marked "No registration" need none.
Is a no-logs AI claim verifiable?
Only if an independent audit confirms it or the system is built so the operator cannot access prompts. Otherwise it is a policy statement, and the listing labels it as one.
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