Tacendo
How a message stays private
01 · On your device
It starts with you.
You type a message. Until you send it, it exists only in your browser.
02 · In transit
Sealed before it leaves.
Every hop travels over HTTPS, the same encryption behind the padlock in your address bar. Nobody on the network in between can read it.
03 · Our server
Passed along, never kept.
Our server opens the request only to check you’re signed in and forward it. It keeps no copy, and we don’t log what you write or what the model replies.
04 · The model
Answered in a sealed room.
TEE models run on confidential computing hardware with isolated, encrypted memory, walled off even from the people running the machine. Incognito models are labelled, and go to their provider instead.
05 · Storage
Saved as noise.
Chats stay in your browser by default. Turn on sync and each one is encrypted on your device first, so our database only ever holds ciphertext.
06 · Your key
Only you can open it.
Your passkey or recovery key unlocks your history, and it’s decrypted on your device. We don’t hold that key, so we couldn’t read your chats if we tried.
Peek at our side
This is what a synced chat looks like to us. Go ahead, try to read it.
In your browser
unlockedCan you help me word an email asking my manager for medical leave?
Of course. Keep it short and factual: the dates you need, that it’s for a medical reason, and an offer to hand over your current work before you go.
Decrypted on your device, and only while your chats are unlocked.
In our database
Encrypted message
Encrypted message
Stored as ciphertext. We can see its size and when it was saved.
Ask anything. We’ll keep quiet.
Sign in with a Solana wallet. No email, no name.