Fluxer: The Open Source Instant Messaging and VoIP Platform for Communities

Fluxer is a free and open source instant messaging and VoIP platform designed for friends, groups, and communities. With a focus on privacy, control, and extensibility, Fluxer empowers users to self-host their own instance with every feature unlocked—no paywalls, no vendor lock-in.

Why Fluxer?

Fluxer is rapidly evolving, with a growing user base (over 125,000 users) and an active development team. The project is committed to making self-hosting and contributing as easy as possible, with all features available out of the box for self-hosted deployments.

Key Features

Real-time messaging: Typing indicators, reactions, and threaded replies for seamless conversations.
Voice & video: High-quality calls in communities and DMs, including screen sharing, powered by LiveKit.
Rich media: Link previews, image/video attachments, and GIF search via KLIPY.
Communities and channels: Organize text and voice channels into categories with granular permissions.
Custom expressions: Upload custom emojis and stickers for your community.
Self-hostable: Full control of your data—run your own instance with no restrictions.

Tech Stack

Fluxer leverages a modern, high-performance stack:

TypeScript and Node.js for backend services
Hono for HTTP services
Erlang/OTP for real-time WebSocket gateway
React and Electron for desktop/web clients
Rust (WebAssembly) for performance-critical client code
SQLite (default) and Cassandra (optional) for storage
Meilisearch for full-text search
Valkey (Redis-compatible) for caching and coordination
LiveKit for voice/video infrastructure

Getting Started

Self-hosting: Guides and documentation are available at docs.fluxer.app. The team is working to make self-hosting even easier—stay tuned for updates!
Development: Fluxer uses devenv for a reproducible Nix environment. Experimental support for VS Code Dev Containers is also available.

Community and Contributions

Fluxer is licensed under AGPLv3 and welcomes community contributions. The project is transitioning to more open development, with PRs and community involvement encouraged. If you're interested in contributing or joining the team, check out the careers page or CONTRIBUTING.md.

Support and Security

Fluxer is on the path to becoming a sustainable, community-driven platform for modern communication. Try it out, contribute, or join the conversation!

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