Gajim vs SimpleX Chat
Gajim
gajim.orgSimpleX Chat
simplex.chatSide by side
| Figure | Gajim | SimpleX Chat |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | Yes |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| iOS | — | Yes |
| Android | — | Yes |
| API | — | Yes |
| Self-hosted | — | Yes |
| Plans published | 1 | 2 |
| Spec score · Encrypted Messaging Apps | 7.8 (#20) | 8.4 (#3) |
| Spec score · Secure Messaging Apps | 7.8 (#20) | 8.5 (#5) |
| Encryption | The site describes end-to-end encryption for conversations and sharing messages, pictures, and files with contacts. | The network uses end-to-end encryption with continuous post-quantum key exchange for messages and metadata. |
| Funding | Gajim is free software and the site invites users to support its volunteer development with donations. | SimpleX announced a $1.3 million pre-seed round led by Jack Dorsey with participation from Asymmetric Capital Partners in August 2024. |
| Messaging features | Users can send reactions and replies, record voice messages, and post status updates. | 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. |
| Purpose | Gajim is a free chat app for XMPP. | SimpleX Chat is a messaging application built on the SimpleX platform. |
| Support | Users can join Gajim’s XMPP chat to ask questions, share ideas, or report issues, and the site links to an issue tracker. | Users can contact the team through the in-app “Ask SimpleX team” contact or by emailing [email protected]. |
Plans
In their own words
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.