Own your
keys
The zero-knowledge security suite for your passwords, payment cards, crypto wallet and private messages. Encrypted on your devices, synced between your phone and computer.
Zero-knowledge · post-quantum encryption · 14-day free trial, no card
Everything you own,
in one vault
A real desktop app,
not a browser tab
Guardikey runs natively on your machine. The vault opens in milliseconds, autofill works across every browser, and nothing is rendered from a remote server you have to trust.
Import your passwords from Chrome, Edge, Firefox and Brave in one pass. A local AI assistant and a system accelerator come built in.
Our servers see
nothing
Guardikey is zero-knowledge. Your master password never leaves your device, and everything is encrypted before it ever syncs. If our sync servers were breached, there would be nothing on them to read.
Flip the switch to see the same vault entry from your side, and from the outside.
T9$kb!2pQ…wvXJBSWY3DPEHPK3PXPAEGIS-CASCADE-512
9f84a1c0e7b2…d31f6a88c4e0b97215aa3e4c
7d02f9e1bb48c6a0f35e71d9c82a04ff6e1b…
c4e0b97215aa3e4c7d02f9e1bb48c6a0f35e
…e71d9c82a04ff6e1b9f84a1c0e7b2d31f6a
The real cryptography
No vague “military-grade” claims. These are the exact primitives Guardikey uses, named in full and verifiable in the app.
Post-quantum hybrid
Key exchange combines classical X25519 with ML-KEM so recorded data stays safe against a future quantum computer.
Cascade encryption
A triple cascade, XChaCha20-Poly1305 + AES-256-GCM, keyed by Argon2id. One broken cipher is not enough.
Zero-knowledge by design
Your master password derives the keys locally. It is never sent, stored or recoverable by anyone, including us.
Hardware-key unlock
Unlock with a FIDO2 security key or your device’s biometrics. A stolen vault file is useless without your key.
Simple pricing.
Locked for life.
Founders’ launch: 50% off for the life of your plan. 14-day free trial, no card, and a 30-day money-back guarantee.
Free
One device. The essentials, forever.
- 1 device (phone or computer)
- Up to 50 vault items
- Local zero-knowledge encryption
- Login autofill & biometric lock
Pro
Just $1.25/mo, billed yearly · regular $29.99
Regular $3.99/mo · yearly saves 50%
For one person, on up to 5 devices.
- Everything in Guardikey, unlimited
- Up to 5 devices — phone + computer, in sync
- Zero-knowledge sync across your devices
- Crypto wallet, encrypted messenger, local AI
- FIDO2 hardware key & payment cards
Family
Just $2.50/mo, billed yearly · regular $59.99
Regular $7.99/mo · yearly saves 50%
Up to 5 people, 25 devices in all.
- Everything in Pro, for up to 5 people
- Shared family vaults
- Priority support
Questions
worth asking
The honest answers behind “zero-knowledge”: what we can and cannot do.
What can Guardikey’s servers see?
Nothing readable. The app is local-first and zero-knowledge: your data is encrypted on your device before it is stored, and your master password is never transmitted. Multi-device sync moves only encrypted blobs that no server can open.
What happens if I forget my master password?
Because only you hold the key, no one (not even us) can open your vault for you. That is the point of zero-knowledge. Keep your recovery kit safe; it is the one way back in.
Is the crypto wallet really self-custody?
Yes. Your seed phrase is generated and encrypted on your device and never leaves it. Guardikey signs transactions locally; we never hold your keys or your funds.
Do I need an internet connection?
Your vault, wallet and messenger work fully offline on each device. The internet is used only to sync encrypted data between your phone and computer and to keep your subscription active, never to read your data.
Can one account cover my phone and computer?
Yes. A Pro account covers up to 5 of your own devices, and your vault stays zero-knowledge synced between your phone and computer. Family extends this to 5 people, 25 devices in all.
Will the founders’ price really stay the same?
Yes. Join during the founders’ launch and your price is locked for the life of your subscription, even after we raise prices for new customers. Cancel anytime; a 30-day money-back guarantee covers your first charge.