Tilli T
Self-hosted messaging with Signal Protocol encryption. Zero-knowledge by design.
Privacy isn't a feature. It's the architecture.
TilliT is a zero-knowledge messaging platform with Signal Protocol encryption. Launch your own private server even on a Raspberry Pi, or choose a trusted server.
The server can never read your messages. No mandatory cloud, no metadata collection, built-in post-quantum Kyber keys.
Key features
Real security, not just promises
Self-Hostable
Runs on Raspberry Pi (~100MB RAM). Launch your server in 5 minutes with a single command.
Signal Protocol
End-to-end encryption with Double Ratchet + X3DH. Forward secrecy for every message.
Zero-Knowledge
The server can never access message content — not even if it is compromised.
Post-Quantum
Integrated Kyber keys to resist future quantum attacks. Onion Routing ready.
Open Source
Fully verifiable AGPL-3.0 backend. Public, auditable source code.
Decentralized
Like email: run it yourself, or choose a server. The network grows through addition, not centralization.
The problem with traditional apps
Even when messages are encrypted, you're still using someone else's infrastructure
Metadata
Who talks to whom, when, and how often. This data is often more revealing than the content itself.
Centralization
A single company controls access, can change the rules, and can be forced to cooperate.
Opaque servers
You can't verify what happens behind the scenes. You have to trust them. WhatsApp is E2E but Meta collects metadata.
Encryption alone is not enough. Control over infrastructure matters.
How it works
Three simple steps to secure communication
Choose your server
Launch your private server with a single command (even on Raspberry Pi), or use an existing public or trusted server.
Connect from the app
Link the app to your chosen server. Private keys stay securely on your device (iOS Keychain, Android Keystore).
Communicate securely
The server transports but never reads. End-to-end encryption for every message, media file, and attachment.
Deployment options
Choose the option that best fits your needs
Your private server
Install TilliT server on Raspberry Pi, VPS, or home server. It only takes minutes to achieve maximum control over your data.
- Total control over the infrastructure
- No data on external servers
- ~100MB RAM (Raspberry Pi compatible)
- Installation in 5 minutes
Trusted server
Connect to a public server or one managed by someone you know. No configuration needed, same end-to-end security.
- No configuration
- Same E2E encryption
- Server is still zero-knowledge
- Start right away
Who TilliT is for
For anyone who wants secure communication with full control over the infrastructure
Sensitive organizations
Journalists, activists, professionals, NGOs. When privacy isn't optional but an operational requirement. Native Tor support.
Communities
An independent, self-managed space with invitations and private rooms. The network grows by adding servers, not by centralization.
Teams and companies
Internal communications under full control. Decide where data lives, who administers the infrastructure, and which policies to enforce.
Families
A private home server to communicate only with loved ones. No data on external servers. No company tracking your conversations.
Start now. Zero trust required.
Download the app, launch your server in minutes, or connect to a trusted server.