Fluxer - Free Open Source Discord Alternative

TL;DR

TL;DR: Fluxer is a free, open-source team chat platform with text, voice, and video — a self-hostable Discord alternative with native desktop and mobile clients.

Source and Accuracy Notes

⚠️ This section is MANDATORY. All links must be verified from actual source, not guessed.

• Project page: fluxer.app — verified via homepage (2026-08-16)
• Source repository: github.com/fluxerapp/fluxer — verified via GitHub API (stars: 9,971, pushed: 2026-08-15)
• License: AGPL-3.0 — verified from LICENSE file in repo
• HN launch thread: news.ycombinator.com/item?id=42463911 (11 points, 2026-01-02)

What Is Fluxer?

Fluxer is a free, open-source instant messaging and VoIP chat app for friends, groups, and communities. It directly competes with Discord, offering text channels, voice calls, video calls, and screen sharing — without the proprietary lock-in.

The project’s README describes it as:

“A free and open source instant messaging and VoIP chat app built for friends, groups, and communities.”

The key differentiator from Discord is its open-source nature and self-hosting option called Plutonium. As of August 2026, Fluxer is in public beta with clients for web, desktop (Windows, macOS, Linux), and mobile (iOS and Android in public testing).

Platform Support

From the download page, Fluxer supports:

• Web — browser-based client at web.canary.fluxer.app
• Desktop — Windows, macOS, and Linux native clients
• Mobile — iOS and Android (public testing phase)

The desktop client is a native application, not a wrapped web view, which should provide a more consistent experience than Electron-based alternatives.

Self-Hosting With Plutonium

The self-hosting option is branded Plutonium and targets users who want full control over their communication infrastructure. The Operator Guide in the docs covers self-hosting your own Fluxer instance.

As of mid-June 2026, the team was finalizing the API and self-hosting documentation, having paused open-source releases to build out trust and safety infrastructure after spam waves. The latest stable source is being prepared for release.

Key Features

From the product description and site copy:

• Text channels — organized chat with threads and categories
• Voice and video — real-time VoIP with screen sharing
• WebRTC-based — peer-to-peer connections where possible
• Self-hostable — run your own instance via Plutonium
• Open source — code available on GitHub under AGPL-3.0
• Privacy-focused — no proprietary lock-in, your data stays yours
• International — supports 35+ languages from the web client

Setup Workflow

Try the Web Client

No installation required:

1. Open web.canary.fluxer.app in your browser
2. Create an account or sign in
3. Start using text channels or join voice calls immediately

The canary channel runs the latest build with recent audio/video improvements.

Install Desktop Client

1. Visit fluxer.app/download
2. Download the client for your OS (Windows, macOS, or Linux)
3. Install and sign in — same account works across all platforms

Self-Hosting (Plutonium)

The self-hosted option requires running your own Fluxer server instance. Consult the Operator Guide for server requirements and deployment steps.

Security Notes

• Source visible — AGPL-3.0 license means the server code is publicly auditable
• Self-hosting advantage — run your own signaling and media infrastructure
• E2E encryption — check the roadmap at blog.fluxer.app/roadmap-2026 for current encryption status
• Trust and safety — the team explicitly built out trust and safety infrastructure after spam waves caused a development pause

FAQ

Q: How does Fluxer compare to Discord? A: Fluxer is open-source and self-hostable, while Discord is proprietary. The feature set is similar (text, voice, video, screen sharing), but Fluxer is still in active development and may be missing some mature features Discord has built over years.

Q: Is Fluxer free to use? A: Yes, the hosted service at fluxer.app is free. Self-hosting is also free under the AGPL-3.0 license — you only pay for your own server infrastructure.

Q: What platforms does the mobile app support? A: iOS and Android are in public testing as of August 2026. The desktop clients (Windows, macOS, Linux) are more mature.

Q: What license is the code released under? A: AGPL-3.0, confirmed from the LICENSE file in the main branch. Note that AGPL is a strong copyleft license — any network-using derivative works must also be released under compatible open-source terms.

Q: Is the self-hosting documentation complete? A: As of mid-June 2026, the team was finalizing API and self-hosting docs. Check docs.fluxer.app for the latest status.

Q: Does Fluxer support end-to-end encryption? A: Check the 2026 roadmap for the latest on E2E encryption status.

Conclusion

Fluxer is the most credible open-source Discord alternative that has emerged in 2026. With nearly 10,000 GitHub stars, active development, native desktop clients, and a self-hosting option, it fills a real gap for developers and communities who want to move away from proprietary chat platforms. The AGPL-3.0 license ensures the server code stays open.

The main caveat: self-hosting documentation was still being finalized as of mid-June 2026, so the operator experience may involve some manual work. For teams who want to evaluate first, the web and desktop clients offer a zero-install way to try the platform today.

Try it at fluxer.app or browse the source at github.com/fluxerapp/fluxer.