Etergis is a dead-man switch for sensitive information. Encrypt your secrets, assign recipients, check in regularly. If you stop — they receive everything, automatically.
No credit card required. Free tier includes 3 secrets and 2 recipients.
No complexity for you. The math happens behind the scenes.
Messages, documents, account credentials, instructions — anything you'd want someone to have if you weren't around. Encrypted on your device before upload.
Choose who gets what. Each recipient gets their own key-wrapped copy — one person's access can never expose another's.
Daily, weekly, monthly — you decide. One tap resets the countdown. Miss it, and we send reminders before anything happens.
If the countdown expires, recipients get a secure link and enter the passphrase you set. No account required on their end. No app to install.
Zero-knowledge means your data is encrypted before it leaves your device. Our servers store ciphertext. Even with a court order, we can't produce plaintext.
AES-256-GCM
Authenticated encryption with additional data (AAD). Content-binding prevents ciphertext transplant attacks.
Argon2id · 64 MiB · t=3
Memory-hard key derivation. Offline brute-force against your vault passphrase is economically infeasible.
X25519 + HKDF
Per-recipient ephemeral key wrapping with forward secrecy. Compromising one recipient reveals nothing about others.
Shamir (k-of-n)
Threshold secret sharing splits your DEK into shares. No single custodian holds enough to reconstruct.
All plans include end-to-end encryption, heartbeat monitoring, and recipient delivery.
Get started with basic protection.
For individuals who plan ahead.
For families and small teams.
Create a free account. Set up your first secret in under two minutes.
Get started free