One password. everything safe.
FortNox keeps every password, card, and note locked up on your computer. Even we can't see what's inside.
Built to last,
built to be safe.
Made with the same kind of code that runs operating systems and banks. Fast, durable, and free of the bugs that lead to leaks.
Choose what each app sees
Let your marketing AI use your social logins, but keep banking and email totally hidden. Decide per-app what's visible — change your mind any time.
See every request
Every time an AI assistant asks for a password, you see it. The log can't be tampered with. One click cuts an agent off if something looks off.
Built for AI assistants
Claude, Cursor, and other AI tools can ask FortNox for the credentials they need — but only the ones you've allowed, only when you say so.
We can't see
your stuff.
The lock is on your computer, not ours. Even if our servers got broken into, your passwords would still be unreadable.
Bank-grade lock on every secret
Each password and note is wrapped in XChaCha20-Poly1305 — the same family of encryption used by Signal and modern security agencies. Your master password is hardened with Argon2id, the gold-standard defense against guess-and-check attacks.
Built to survive guesses
Argon2id slows password guessing by making every attempt deliberately expensive. A strong master password plus your Secret Key is what keeps the vault out of reach.
// fortnox-core/crypto.rs
pub fn derive_key(password: &str) -> [u8; 32] {
let params = Argon2Params {
m_cost: 65536,
t_cost: 3,
p_cost: 4
};
// Zero-knowledge derivation
Argon2::derive(password, ¶ms)
}
Experience
the Control.
Scroll to authorize agent decryption.
You define the Boundary.
The FortNox Agent Bridge validates your presence. Our protocol ensures that agents only see what you authorize, exactly when you allow it.
Agent Bridge Status
- Active Presence Check
- Temporal Credential Release
Choose your vault.
Professional security for individuals, families, and teams.
Personal
High-speed sync and advanced security for individuals.
Family
Secure your entire household and their agents.
Teams
For teams and fleets of AI agents requiring shared access.
Compatible with your ecosystem
Common questions
The honest answers most people want to know.
If I forget my password, can you reset it?
No, and that's the point. We never see your password. If you lose it AND lose your recovery words, your saved data is gone — not even we can get it back. That's why the app makes you save an Emergency Kit during setup.
Where do my passwords actually live?
On your computer, in a locked file only you can open. If you turn on sync, an encrypted copy goes to our servers — but it's gibberish to us without your password.
What if FortNox goes offline?
Nothing breaks. The app on your computer keeps working. Sync just pauses until we're back. You're not dependent on us being up.