The one that runs on no one’s server.
Every messenger that calls itself private still has to answer one question: who carries your messages? For all of them, the answer is a server or a relay you have to trust. Only one rides the chain itself.
Cost to send
$0.00
Feeless by protocol
Authentication
zk-STARK
Post-quantum
Metadata
Hidden
Sender + recipient
Lifetime
2wk
Then it’s gone
01
Everyone else runs on servers
Every app that calls itself private has to answer one question: who carries your messages? For all of them, the answer is a server or a relay you’re forced to trust. A message funneled through infrastructure someone else controls isn’t private, it’s permissioned.
Mainstream
Signal, WhatsApp, Telegram
Strong encryption, but one company and one set of servers — it can be compromised, compelled, or shut off, and it still sees the timing and the social graph.
“Decentralized”
Session, SimpleX, Nostr
No single company — real progress — but your messages still ride a relay network you have to trust to carry and hold them. Off-chain, always.
stealthtext
The chain carries it
No company, no relay network, no operator to trust, compel, or switch off. That’s the one thing none of the others can claim.
02
Who carries your messages
| Property | stealthtext | Signal | Session | SimpleX |
|---|---|---|---|---|
| Carried by | The blockchain | Company servers | Staked relay nodes | Relay servers |
| Operator you must trust | None | The company | The node set | The server you pick |
| Runs with no messaging server | Yes | No | No | No |
| Sender + recipient hidden | Yes | No — metadata | Partial | Yes |
| Post-quantum encryption | Yes | Hybrid | No | No |
| Post-quantum authentication | Yes | No | No | No |
Every other messenger runs on something. Signal is centralized; Session and SimpleX are decentralized but still a relay network you must trust. Only stealthtext’s messages live on the chain itself. They’re genuinely private too — the difference is what carries the message.
03
What makes it unique
Metadata
Both ends hidden
Sender and recipient concealed; no address on-chain. A stronger story than sender-only schemes.
Cost
Feeless
No fee and no per-message toll. Spam is held back by a refundable bond, not a charge.
Architecture
No central operator
Carried by the network’s own nodes — not a backend that can be seized or switched off.
Encryption
Post-quantum, proof and encryption
Every message is authenticated with post-quantum zk-STARKs and sealed with a post-quantum encryption KEM — proof and privacy both post-quantum, with no harvest-now-decrypt-later window.
Private. Feeless. On no one’s server.
stealthtext runs on Stealth’s shielded rail — feeless, metadata-hidden, and post-quantum-authenticated.