WIP
in progress: Roomy https://a.weird.one/ (using AtProto) alpha: Sharkord https://sharkord.com/
ActivityPub protocol? MLS layer?
Matrix (https://alternativeto.net/software/matrix-org/about/) is an open protocol for decentralized, encrypted messaging.
A secure collaboration app with end-to-end encryption and interoperability across web, desktop, and mobile. Includes chat, voice, and video calls.
Matrix-based, open-source chat client offering secure group and direct messaging with end-to-end encryption, organized channels, minimal clutter, and modern design.
Has interface similar to Discord, not as featureful as other Matrix client.
Commet is a client for Matrix focused on providing a feature rich experience while maintaining a simple interface. The goal is to build a secure, privacy respecting app without compromising on the features you have come to expect from a modern chat client.
Discord-clone (only UI/UX) for Matrix
Sable is a Matrix client for desktop, with end-to-end encrypted messaging, spaces, threads, and voice and video calls.
XMPP protocol is an living open standard for communications.
For feature supported and which client implements them, check: https://xmpp.org/extensions/ Full list of software: https://xmpp.org/software/
https://alternativeto.net/software/xmpp/
Decentralized social platform built on XMPP, supporting self-hosting, cross-network communication, group chat, video calls, blog publishing, and user data ownership.
Has community, video chat, story, and blogs. Has upcoming screensharing support as well. https://piaille.fr/@movim/116069911976930553
The goal of Gajim is to provide a full featured and easy to use XMPP client. Gajim works nicely with GNOME, but does not require it to run. It is released under the GNU General Public License.
Modern XMPP client
Decentralized group chat with multi-community support, event calendars, threads, classifieds, private messaging, white-labeling, monetization features, and access controls.
Discord-alike, not free to use(?)
Free open-source platform offering instant messaging, VoIP, private DMs, group chats, voice, video, markdown, moderation, search, customization, and self-hosting.
Discord-clone, for-profit company
Open-source, donation-funded chat platform focused on community engagement, featuring animated avatars, custom emojis, profile personalization, posts, and group chat.
![Profile Interface [PC - 2025]](https://img.alternativeto.net/s/309x197/jpeg/nerimity_993222_full.png)
![Messages View [PC - 2025]](https://img.alternativeto.net/s/309x197/jpeg/nerimity_281418_full.png)
![Server Discovery [PC - 2025]](https://img.alternativeto.net/s/309x197/jpeg/nerimity_282508_full.png)
![Server Settings [PC - 2025]](https://img.alternativeto.net/s/309x197/jpeg/nerimity_628028_full.png)
Discord-clone, community-funded
no screensharing, video, or audio.
Open source chat, voice, and video platform supporting self-hosted private servers, Discord compatibility, end-to-end encryption, and flexible plugin systems.
reverse engineering and reimplementation of Discord compatible with Discord API(?)
Self-hosted platform for chat, workflow automation, voice calls, screen sharing, AI-powered features, third-party integrations, and team messaging.
more like Slack alternative for corporate usage
Web chat app with end-to-end encryption, no censorship, rich markdown, self-hosting, communities, screen sharing, privacy focus, and zero data tracking.
Suitable if you only expect Discord features from 2015
Threaded group chat with topics for live or async collaboration, open-source, supporting self-hosted or cloud use, suited for organized team discussions.
Slack-alternative, more suitable for organization or large-scale communities.
Open source, low-latency voice chat offering high quality audio, secure encryption, self-hosting, in-game overlays, positional audio, and granular permissions.
if all you care is voice
Instant messaging with text, voice, video calling, screen sharing, privacy controls, customizable permissions, moderation, bots, and open-source design.
Arguably the most popular Discord-alternative
Valour is an open-source, privacy focused alternative to platforms like Discord or Slack, developed by a small team of volunteers. The app has been in development for over three years and is currently in it's alpha stages of testing.
More closer to Steam Chat
Use crystal clear sound to communicate with your team mates cross-platform with military-grade security, lag-free performance & unparalleled reliability and uptime.
Has its own design approach, might confuse new users in terms of interface Better voice chat than discord
Steam is a digital distribution, digital rights management, multiplayer and communications platform developed by Valve Corporation. It is used to distribute a wide range of games and related media entirely over the internet, stretching from one-man independent efforts to some of...
This entry refering to Steam Chat
Usable for casual gaming session, no advance community features.
![Profile Interface [PC - 2025]](https://img.alternativeto.net/s/618x394/avif/nerimity_993222_full.png)
![Messages View [PC - 2025]](https://img.alternativeto.net/s/618x394/avif/nerimity_281418_full.png)
![Server Discovery [PC - 2025]](https://img.alternativeto.net/s/618x394/avif/nerimity_282508_full.png)
![Server Settings [PC - 2025]](https://img.alternativeto.net/s/618x394/avif/nerimity_628028_full.png)
Comments
https://polyproto.org are building a federation protocol and in the future also a federated chat suite called Polyphony (https://codeberg.org). Perhaps very early, but might be worth to keep an eye out for.
There is also built-in Discord features directly into
Steam I think it's worth mentioning in the list.
Ah yeah, forget about that one! Added and thank you!