Zero-Knowledge Encryption

Your Words,
Their Future

Send meaningful, encrypted messages to your loved ones after you're gone. Your final words, delivered securely through legal verification.

Encrypted MessageAwaiting Delivery
Features

Built for Privacy, Designed for Peace of Mind

Every feature crafted with one goal: ensuring your words reach the right people, at the right time, with complete security.

Client-Side Encryption

Your messages are encrypted on your device before being stored. By default, we never have access to your passphrase - or you can opt into our secure recovery service.

PBKDF2 + AES-GCM-256

Nominee Management

Designate trusted individuals as your message recipients. Add, manage, and update your nominees anytime with verified contact information.

Legal Verification

Messages are only delivered after proper Life Status Verification through established legal processes. No false triggers, ever.

Secure Delivery

Nominees receive secure, time-limited links. OTP verification ensures only the intended recipient can access each message.

Flexible Activity Monitoring

You choose how long to wait (3-60 days) before we begin the verification process. Regular login reminders ensure your account stays active. Simple, non-intrusive checks that you control.

Full Audit Trail

Complete transparency with logged actions. Know when your messages were accessed and by whom, with immutable records.

Optional

Passphrase Recovery Option

Choose how you want to manage your master passphrase. Both options maintain the highest level of security for your encrypted messages.

Recommended

User-Managed Passphrase

You maintain full control of your passphrase. Document it in your will or trusted location. After verification, your executor provides the passphrase to decrypt and deliver messages to your nominees.

  • Complete control - we never have your passphrase
  • True zero-knowledge architecture
  • Integrates with estate planning

Tathastu-Managed Recovery

Opt-in to secure passphrase escrow. Your passphrase is encrypted with threshold encryption requiring multiple authorized parties to decrypt. Perfect if you want a backup recovery option.

  • Passphrase recovery if will is lost
  • Threshold encryption - no single party can decrypt
  • Full audit trail of all access attempts
  • Explicit consent required to enable

Your choice, your control. You can switch between options anytime from your settings. Both methods keep your messages encrypted with AES-256 - the difference is only in how the passphrase is managed.

Process

Simple. Secure. Certain.

Three steps to secure your legacy. Your messages will reach your loved ones when they need them most.

01

Create Your Account

Sign in with Google and create a strong passphrase. This passphrase encrypts all your messages and should be documented in your will.

Passphrase stored locally or in our secure vault
02

Write & Assign Messages

Compose heartfelt messages and assign them to your nominees. Each message is encrypted before storage. Add as many messages and nominees as you need.

Messages encrypted with AES-GCM-256
03

Messages Delivered with Care

After legal verification, your passphrase (from your will) is used to decrypt messages. Nominees receive secure links with OTP verification.

Legal verification required before delivery
Security

Your Privacy is Non-Negotiable

We've built Tathastu with one principle: we should never be able to read your messages, even if we wanted to.

Client-Side Encryption

All encryption happens in your browser. Your passphrase stays local unless you opt into secure recovery.

PBKDF2 Key Derivation

100,000 iterations ensure your passphrase resists brute-force attacks.

AES-GCM-256 Encryption

Military-grade authenticated encryption protects every message.

Complete Transparency

Full audit logs show exactly when and how your data is accessed.

Pricing

Choose Your Legacy Plan

Start free and upgrade as your needs grow. Every plan includes military-grade encryption and secure message delivery.

6 Months Free

Starter

Perfect to begin your legacy journey

2 Nominees
10 Messages
Text messages
Rich content
Escrow recovery
Start Free Trial

Premium

Comprehensive legacy planning

100 Nominees
1,000 Messages
Text messages
Rich content
Escrow recovery
Priority support
Get Started
Coming Soon

Enterprise

The ultimate legacy experience

Unlimited Nominees
Unlimited Messages
Everything in Premium
In-person delivery
Hard copy option
Contact for Early Access

Start Securing Your Legacy Today

Your words matter. Ensure they reach the people who need to hear them, protected by the strongest encryption available.

Create Your Free AccountStart free for 6 months. No credit card required.