Private messaging · without a central owner

Own your private messenger.

Your identity stays on your phone. Your messenger is open source. You choose who carries messages and who notarizes the group.

Four parts.
No single owner.

Most messengers put identity, delivery, rules, and interface behind one company. Onym separates them, so one operator cannot take away the whole system.

01 · YOURS

Identity

Your keys and history live on your device. There is no Onym account to suspend.

No phone number. No email.
02 · OPEN

Messenger

The iPhone and Android clients are open source. Inspect the code or build the app yourself.

A window, not a gatekeeper.
03 · REPLACEABLE

Courier

Nostr relays carry encrypted messages. Pick a relay you trust or operate your own.

The courier cannot read the letter.
04 · VERIFIABLE

Notary

Stellar contracts record group membership and rules. Use one you trust or deploy your own.

The notary does not carry the conversation.

The actual iPhone app

Ownership underneath.
A messenger on top.

You should not need to understand infrastructure to have a private conversation. Create an identity, make a group, invite people, and talk.

19:22
Settings
Alice
ACTIVE
Start a chat by scanning
BLS b0338a0215bc…
Share Backup Delete
Anchors
Anchors
Stellar · Testnet
Relayer
Stellar Soroban

Replace Onym-run instances with your own deployments for maximum privacy.

Transport
Nostr Relays
Inbox + invitation transport
Blossom Relays
Encrypted media storage
Chats Settings
19:45
New Group
Step 1 of 2
Sunny Orchard

Visible to members. You can change this anytime.

Add a greeting, group rules, or policy…

Shown to people before they accept your invite. Optional.

Founder
You’re the founder — you decide who joins and manage the group’s settings. Everyone can chat and share; only you control membership.
Next · Add people
Close
19:15
Alice
Weekend Trip
Maya: I booked the cabin
Family
Dad: Sunday at our place?
Project Team
You: The new build is ready
Neighbors
Leo: Found the missing cat
Chats Settings
9:41
Weekend Trip
Welcome

No messages yet. Say hi.

Invitation
House rules: be kind, share the good photos, no spoilers. Glad you’re here.
End-to-end encrypted Only your group can read what’s sent.
No phone number, no email Your identity is a key you own.
No central server Group membership is anchored on Stellar.
19:42
Nostr Relays
Nostr Relays
Configured · 1
Onym Official DEFAULT
wss://nostr.onym.app
Add custom URL
wss://relay.example.com
Add

Use a private deployment, localhost, or any Nostr relay you trust. URLs must use the wss:// scheme.

Restore default
Re-install Onym Official as the only relay.

Changes apply on the next app launch. The inbox transport reads relays once at boot.

Self-host
Run your own relay
Deploy a Nostr relay with Docker
ChatsSettings
19:31
Weekend Trip
4 members
Maya
hello
Hello
✓✓
✓✓
Message
  1. 01

    It starts as a messenger.

    Your chats, groups, and private conversations are where you expect them. No architecture lesson required.

  2. 02

    Open a chat and just talk.

    Messages and media feel familiar, while end-to-end encryption protects the conversation underneath.

  3. 03

    Then you discover the identity is yours.

    It lives on your device—not in an Onym account. Back it up, move it, or build the open-source client yourself.

  4. 04

    The courier is separate.

    Nostr relays carry encrypted envelopes. Use ours, choose another, or run your own—the courier never owns your identity.

  5. 05

    The notary is separate too.

    Stellar anchors group state without carrying the conversation. Replace or operate each service independently: identity, courier, and notary never collapse into one owner.

iPhone · Android · Open source

A private messenger you can actually own.

Use the defaults. Replace the courier. Deploy the notary. Build the client. Your conversation does not depend on one company remaining in control.