Share Secrets Securely
Maximum Security is where Secretus has no competition — a live peer-to-peer session secured by Signal Protocol combined with ML-KEM-768 post-quantum encryption (NIST FIPS 203). No other secret-sharing tool offers this. Team Split brings threshold cryptography — previously the domain of HSMs and enterprise key vaults — entirely into your browser.
Zero server storage. Zero trust required. Built for the few who understand what real encryption means.
Open Anytime
Standard mode: AES-256-GCM, recipient opens within 15 min up to 30 days
Zero Server Storage
Maximum Security: P2P Signal Protocol — nothing ever stored on our servers
Quantum-Safe
ML-KEM-768 (NIST FIPS 203) post-quantum encryption in Maximum Security mode
Team Split
Shamir's Secret Sharing: require 2-of-3 or 3-of-5 approval before anyone can read the secret
Security & Privacy First
Built with cutting-edge encryption and privacy technologies to keep your secrets safe.
Signal Protocol + ML-KEM-768
Maximum Security mode combines X3DH + Double Ratchet with ML-KEM-768 post-quantum encapsulation. Your secrets stay safe even against future quantum computers.
Async Standard Mode
Send a secret without waiting for the recipient. They open it anytime within 15 minutes up to 30 days — encrypted with AES-256-GCM, key never leaves the URL fragment.
One-Time Viewing
Each secret link is single-use. After the recipient opens it once, the ciphertext is permanently deleted and the link becomes invalid — provably gone forever.
Zero-Knowledge Architecture
Our servers never hold your encryption keys. All cryptographic operations happen in your browser via Web Crypto API. Even Secretus cannot read your secrets.
EU / GDPR Compliant
Operated from Romania, EU. All infrastructure within AWS eu-central-1. Analytics only after explicit consent. GDPR-first by design. Data export and deletion on request.
Delivery Confirmation & Revocation
Know the moment your secret is opened — real-time delivery status in the sender UI. Changed your mind? Revoke any unread secret instantly, even hours after sharing the link.
Secret Request Links & Templates
Generate a request link and ask someone to send YOU a secret — only you can decrypt it. Built-in templates for SSH keys, database credentials, API keys, and Wi-Fi passwords.
Team Split — Shamir's Secret Sharing
Split a secret into N shares with a k-of-n threshold: any 2-of-3 or 3-of-5 holders can reconstruct it, but no single holder can access it alone. 100% client-side, zero server storage for shares.
How Secretus Works
Three modes for every threat model. Choose the one that fits your situation.
Write Your Secret
Type your secret and choose an expiry — 15 minutes up to 30 days, or a custom date. AES-256-GCM encryption key is generated randomly in your browser.
Share the Link
A unique link is generated with the encryption key hidden in the #fragment — invisible to our server. Copy it or share via QR code.
Recipient Opens Anytime
The recipient clicks the link whenever they're ready — no scheduling needed. The secret is decrypted locally in their browser.
Link Expires
After first view, the ciphertext is deleted from the server. The key was never sent — gone forever, provably.
Why Users Love Secretus
Trusted by privacy-conscious individuals and teams worldwide.
Perfect For:
Sharing Passwords & PINs
Securely share login credentials, access codes, and sensitive account information.
Confidential Notes & Links
Send private messages, private voice messages, confidential documents, or secure access links.
Client & Team Onboarding
Safely onboard new clients or team members with temporary access credentials.
Async Sharing
Send now, they open when ready. No scheduling, no simultaneous presence required.
Team Approval Workflows
Distribute API keys, recovery codes, or critical credentials requiring 2-of-3 or 3-of-5 approval before anyone can access them.
Privacy-First Communication
For anyone who values privacy, security, and peace of mind in digital communication.
Key Benefits:
Simple, Transparent Pricing
Every plan starts with a 14-day free trial — full access, no credit card required.
Starter
Async one-time secret sharing for individuals
14-day free trial included
- Unlimited secrets — no monthly quota
- Text-only secrets
- ⚡ Standard Mode — AES-256-GCM (quantum-resistant)
- Custom expiry: 15 min to 30 days
- One-time viewing — auto-deleted on open
- Zero-knowledge architecture
- Secret labels & annotations
- Secret revocation — cancel before opening
- Delivery confirmation — know when opened
- 📬 Secret request links — ask others to send you secrets
- Secret templates — SSH, database, API key, Wi-Fi
- Audit log — 90-day history, JSON & CSV export
- Two-factor authentication (TOTP / MFA)
- Installable PWA — iOS & Android
Pro
Add post-quantum P2P for high-security transfers
14-day free trial included
- Everything in Starter
- 🔒 Maximum Security — Signal Protocol + ML-KEM-768 (NIST FIPS 203)
- Zero server storage (P2P mode)
- Priority support
Business
Full suite: files, voice & k-of-n team approval
14-day free trial included
- Everything in Pro
- 🔑 Team Split — Shamir k-of-n threshold
- Text + file + audio attachments (up to 5 MB)
- API keys — up to 5 keys, REST API integration
- 📊 Compliance PDF — SOC-2, GDPR Art. 30, DORA
- 1-year audit log retention
Need a custom plan for a larger team? Contact us.
Ready to Share Secrets Securely?
Join thousands of users who trust Secretus for their most sensitive information. Start sharing secrets securely today.