Now available — free to start

Your secrets delivered
only when it matters

End-to-end encrypted dead-man's switch. Protect sensitive information and ensure it reaches the right people — automatically, securely, on your terms.

Built for people who plan ahead

Whether it's passwords, legal documents, final messages, or business continuity — Etergis ensures nothing is lost.

🔐

Zero-Knowledge Architecture Live

Your secrets are encrypted on your device before they ever leave it. We cannot read your secret content. No one can — except the people you choose.

⏱️

Dead-Man's Switch Live

Set a countdown. Check in regularly to keep it running. If you stop checking in, your secrets are delivered to your chosen recipients.

🔑

Recipient-Based Key Wrapping Live

Each recipient's copy of your data is encrypted to them with X25519 + AES-256-GCM and forward-secret ephemeral keys. A single recipient leak doesn't expose anyone else.

👤

Recipient Portal Live

Recipients don't need an account. They receive a secure link and enter a passphrase you set. Simple, respectful, private.

📱

Web & Mobile Live

Check in from anywhere. Available on web now — iOS and Android apps arriving this month. Push notifications remind you before your countdown expires.

📋

Attachments & Documents Live

Attach files, PDFs, images, or any document to your secrets. Everything is encrypted with the same zero-knowledge architecture.

🧩

Shamir Secret Sharing Live

Split your encryption keys into shares distributed across trusted recipients, with a configurable threshold required to reconstruct. No single point of failure.

🛡️

Argon2id Vault Protection Live

Your vault passphrase derives keys via memory-hard Argon2id (m=64 MiB, t=3), making offline brute-force attacks against stolen encrypted backups economically prohibitive.

How it works

Three steps to protect what matters most.

1

Create & encrypt your secrets

Write messages, upload documents, set passphrases for recipients. Everything is encrypted on your device with AES-256-GCM before upload.

2

Set your countdown & check in

Choose how long your dead-man's switch runs — 24 hours to 30 days. Check in regularly via the app. One tap resets the timer.

3

Secrets are delivered if you don't

If the countdown expires, recipients are notified with a secure link. They enter the passphrase you set and access their package. No account required.

Security you can verify

We don't ask you to trust us. We built it so you don't have to.

AES-256
GCM authenticated encryption
X25519
ECDH key wrapping
Argon2id
Memory-hard passphrase KDF
Zero
Secret content we can access

Ready to secure your legacy?

Create your free account in seconds. No credit card required.

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