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Introduction
Tacita AI is privacy-first AI on Robinhood Chain, with anonymous requests by default, attested end-to-end encrypted TEE mode, history kept only in your browser, and wallet-only sign-in.
On this page
Tacita AI is privacy-first AI on Robinhood Chain. Privacy comes first, and everything else comes second. You get chat, images and video from top models without handing over who you are. When the content itself is sensitive, you can encrypt it so that only an attested enclave can read it.
Tacita is named after the Roman goddess of silence. We try to live up to the name: we store as little as we can, and we tell you exactly who can see what.
Privacy first#
- Anonymous by default. Every request is sent under Tacita's own identity, never yours. Your IP address, user-agent and wallet never reach the model provider.
- Attested, end-to-end encrypted TEE mode. Your browser checks the enclave's hardware attestation, then encrypts each message to the enclave's key. The message is decrypted only inside the enclave. Tacita, the model provider and the host can't read it.
- History only in your browser. Your chats are stored in your browser, encrypted with a key derived from your wallet's signature. Tacita has no copy.
- Our gateway keeps no logs of what you ask. It forwards your request and writes none of it to a log or a database. Our database holds credit counters, not content.
- Wallet-only sign-in. No email, no phone, no password. No analytics and no trackers on the site.
- Honest labels. For each mode we say exactly who can read your prompt, including us. Anonymous mode is never called "fully private".
Two modes#
| Anonymous | TEE | |
|---|---|---|
| What it hides | Who is asking | Who is asking, and what you ask |
| How it works | Your request reaches the model provider without your identity: no IP address, no user-agent, no wallet. | Your browser encrypts the request. It's decrypted only inside an attested confidential-compute enclave, operated by Phala or NEAR AI. |
| Who can read your prompt | The model provider, which may log it. Our gateway also sees it in transit but doesn't store it. | Only the attested enclave. Tacita, the model provider and the host can't. |
| Encryption | Standard HTTPS in transit. Each party in the path can read the prompt. | End-to-end, from your browser to the enclave |
| Models | Text, images and video, including frontier models such as Claude and GPT | 12 open-weight text models |
| How you know | You trust the provider and this label | Hardware attestation, checked live for each model |
| Access | Anyone with credits | Anyone with credits |
Anonymous mode hides who you are, not what you write: the model provider sees your prompt and may keep it. If you need to hide the content as well, use TEE mode. Privacy modes has the full breakdown, including the known limitations.
Models and pricing#
Tacita gives you every top model in one place, for chat, images and video. See Models.
You pay only for what you use. Each model has a transparent price per token, per image or per video, the pricing is the same for everyone, and there are no subscriptions. Top up your Main balance in ETH or USDG (Top up), and every model in both modes is open to you. Credits explains exactly how each request is charged.
The token: a bonus#
Holding the Tacita token is optional. Holders get a daily Bonus balance of free credits, from $0.10 to $1.00 depending on their tier, usable on any model in either mode and spent before your Main balance. See Token.
Who it's for#
- People with sensitive questions. If you're asking about health, legal, money or work matters, TEE mode gives you an enclave you can check, not just a promise.
- People who want top models without an account. You don't hand over an email, a phone number or a card.
- Robinhood Chain users and Tacita token holders. Your holding comes with daily AI credits.
How it works#
- Sign in with your wallet. You sign a standard Sign-In with Ethereum (SIWE) message. There's no transaction and no gas.
- Pick a mode and a model, then ask. In TEE mode your browser verifies the enclave and encrypts your message first. The gateway checks your credits and sends the request under Tacita's own identity, never yours.
- The answer streams back. The conversation is saved only in your browser, encrypted. The gateway keeps a credit counter for your wallet and nothing about what you asked.
- Credits cover usage. You're charged for actual usage, from your Bonus balance first, then your Main balance.
Where to next#
- Quickstart: connect a wallet and send your first message.
- Privacy modes: exactly who can see what.
- Attestation: how to check the enclave yourself.
- Credits: how usage is charged.
- Token: what the token adds, and what it isn't.
Questions or bug reports: @tacitachat on X.