Zero-knowledge vault

Own your secrets, keep them unreadable.

SeinKey encrypts everything in your browser before it reaches the server. Manage passwords, addresses, and payment data with confidence, then share only what you choose.

Start free I already have an account

Client-side encryption Expiring share links Multi-device access Risk insights

Built for

Founders Design teams Ops & finance Personal vaults

Zero-knowledge

Servers never see plaintext credentials.

Encrypts before upload
Keys stay on your device
Server stores ciphertext only

1-click share

Send a secret with optional expiry.

One-time secrets
Auto-expiring links
Revoke anytime

Risk signals

Spot weak and reused passwords fast.

Weak password flags
Reuse detection
Actionable fixes

Trusted access

Secure sessions across devices.

Device trust controls
Session revocation
Login alerts

Pricing that grows with your vault

Start free, then unlock team controls and enterprise-grade security as you scale.

Free

For personal vaults and everyday credentials.

$0 /month

Core vault + password generator
Share links with optional expiry
Addresses and payment vaults
Risk insights and weak password flags
Session alerts and device lock

Get started

Team

Collaborate with shared vaults and trusted devices.

$3 /month

Multi-device sync for every member
Up to 5 seats with role-based access
Advanced sharing controls + revoke
Trusted device management
Session revocation across devices

Start team

Business

Advanced controls, compliance, and priority support.

$6 /month

Unlimited seats and shared vaults
Audit log export and activity history
Key rotation and vault re-keying
2FA backup codes
Priority support response

Start business

Security layers

Master password stays only on your device.
Zero-knowledge design keeps servers blind.
Client-side AES encryption for all vault items.
Secure device storage for wrapped keys.
Share links can expire or be revoked.

Zero-knowledge

AES-256

Share links

Revoke access

What you control

Pick which items to share — never the full vault.
Set expirations and regenerate secrets anytime.
Monitor risky passwords from the dashboard.
Manage devices and revoke sessions.

Frequently asked questions

Is SeinKey really zero-knowledge?

Encryption happens in your browser.
The server only receives ciphertext.
Your master password is never sent or stored.
Only your device can decrypt what you see.
That is why it is zero-knowledge.

Can I share one item without exposing my whole vault?

Each share link encrypts a single item.
You choose who receives the link and secret.
Shared items never reveal your full vault.
Links can expire or be revoked instantly.
You stay in control of every share.

What happens if I forget my master password?

Your vault cannot be decrypted without it.
You can reset the account and start fresh.
We cannot recover the master password for you.
Use a backup strategy for critical items.
Security is strong because recovery is strict.

Is there a free plan?

Yes. Personal vaults are free to start.
Paid plans unlock advanced team controls.
You can upgrade when you need more.
No credit card is required for the free plan.
Your vault data is always yours.

Can I revoke a share after sending it?

You can revoke a share at any time.
Revoking invalidates the link on the server.
The recipient loses access instantly.
You can re-share with a new secret.
Access stays tight and auditable.

Ready to lock it down?

Create your secure vault in minutes.

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