Fluxer is an instant messaging and VoIP platform designed for friends, groups, and communities. It combines real-time chat, voice and video communication, and community-focused spaces with channels, permissions, and moderation tools.
The software can be self-hosted on your own hardware, and the official clients provide access from the desktop and the browser.
This is free and open source software.
Key Features
- Real-time messaging with typing indicators, reactions, and threaded replies.
- Voice and video calls in communities and direct messages, with screen sharing.
- File sharing, link previews, image and video attachments, and GIF search.
- Communities with text and voice channels organized into categories.
- Granular roles and permissions for managing communities.
- Moderation tools with audit logs, webhooks, and bot support.
- Search message history and use a quick switcher to move between communities and channels.
- Upload custom emojis and stickers for your community.
- Apply custom CSS themes along with compact mode and display options.
- Self-host your own instance and switch between multiple instances.
Website: fluxer.app
Support:
Developer: Fluxer Platform AB
License: GNU Affero General Public License v3.0

Fluxer is written in TypeScript. Learn TypeScript with our recommended free books and free tutorials.
Related Software
| VoIP Software | |
|---|---|
| Jitsi | Innovative open source voice and video conferencing |
| Mumble | Voice chat application for groups |
| Jami | SIP-compatible softphone and SIP-based instant messenger |
| GNU Gatekeeper | Feature-rich project that implements an H.323 gatekeeper. |
| Kamailio | Build large platforms for VoIP and realtime communications |
| FreeSWITCH | Telephony platform for voice and chat driven products |
| Asterisk | Complete PBX system |
| Wire | Encrypted instant messaging client |
| Galene | Easy to deploy videoconference server |
| Linphone | Voice over IP softphone, SIP client and service |
| Janus | General purpose WebRTC server |
| GOnnect | Easy to use VoIP client |
| Calls | Make phone and SIP calls |
| Ekiga | VoIP and video conferencing application for GNOME |
| qTox | Chat, voice, video, and file transfer IM client |
| Empathy | Instant messaging and voice over IP client |
Read our verdict in the software roundup.
Explore our comprehensive directory of recommended free and open source software. Our carefully curated collection spans every major software category.This directory is part of our ongoing series of informative articles for Linux enthusiasts. It features hundreds of detailed reviews, along with open source alternatives to proprietary solutions from major corporations such as Google, Microsoft, Apple, Adobe, IBM, Cisco, Oracle, and Autodesk. You’ll also find interesting projects to try, hardware coverage, free programming books and tutorials, and much more. Discovered a useful open source Linux program that we haven’t covered yet? Let us know by completing this form. |

