OMEMO Chat vs SimpleX Chat
OMEMO Chat
omemo.globalSimpleX Chat
simplex.chatSide by side
| Figure | OMEMO Chat | SimpleX Chat |
|---|---|---|
| Price from | — | Free |
| Free plan | — | Yes |
| Free trial | Yes | — |
| Open source | — | Yes |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | — | Yes |
| iOS | — | Yes |
| Android | Yes | Yes |
| API | — | Yes |
| Self-hosted | — | Yes |
| Plans published | 1 | 2 |
| Spec score · Encrypted Messaging Apps | 7.2 (#35) | 8.4 (#3) |
| Encryption | The site describes a hybrid post-quantum key exchange using X25519 and ML-KEM-1024. | The network uses end-to-end encryption with continuous post-quantum key exchange for messages and metadata. |
| Messaging features | The Chat App Only page says the app supports encrypted text, media, voice, and video communications. | The apps support encrypted messages with Markdown and editing, encrypted media and files, decentralized groups, voice messages, disappearing messages, audio and video calls, portable storage and incognito mode. |
| Support | The FAQ says email or encrypted chat reaches the same person and receives a reply within a day. | Users can contact the team through the in-app “Ask SimpleX team” contact or by emailing [email protected]. |
Plans
In their own words
OMEMO Chat
OMEMO Chat has no write-up on Specifiction yet; its figures are above.
SimpleX Chat
SimpleX Chat is a messaging application for the SimpleX platform, with apps for Android, iOS, Linux, macOS, and Windows. It supports encrypted text with Markdown and editing, media and file sharing, decentralized groups, voice messages, disappearing messages, and audio and video calls. The network does not assign profile identifiers such as phone numbers or usernames. Messages and metadata use end-to-end encryption with continuous post-quantum key exchange. Four servers participate in each chat so relay servers cannot see which IP addresses communicate. Profiles, contacts, and messages remain in a portable encrypted database on user devices; relay servers hold encrypted messages only until delivery. Users may operate their own servers and still reach people using preconfigured servers. Developers can build bots and integrations using protocol SDKs; the TypeScript SDK connects to the Chat CLI over a WebSocket API. A phone or tablet can link to the desktop app only when both devices share a local network. Disappearing messages and recipient-side deletion are not guaranteed when a recipient device is offline or modified. The free plan costs nothing.