Fluxer

Fluxer: Open Source Alternative to Discord

Fluxer is a free, open-source instant messaging and VoIP platform for friends, groups, and communities, with a Discord-style interface — servers, channels, voice and video calls, threaded replies, custom emojis, and moderation tools. It's AGPL-3.0 licensed and built to be self-hosted from day one.

What is Fluxer?

Fluxer targets community-style chat rather than corporate team messaging, making it an open-source alternative to Discord for people who want to self-host and own their data. It also overlaps with Rocket.Chat — another open-source chat platform — though Fluxer's design leans toward gaming and social communities rather than workplace collaboration.

Note: self-hosting runs on Docker Compose with a documented setup, backup, and upgrade path. The one notable caveat is voice/video: it isn't carried over a plain public-hostname tunnel (e.g. a Cloudflare Tunnel), so you'll need direct port exposure or a separate TURN server for calls to work.

Core features

• Messaging — Markdown-formatted text, private DMs, group chats, and channels organized into servers, with a quick switcher and filterable message history search.
• Voice & video calls — multi-party calls with screen sharing, noise suppression, and multi-device support, so the same account can stay connected from more than one client.
• Moderation tools — granular, role-based permissions, audit logs, and webhook support for connecting bots and external integrations.
• Customization — custom emoji and sticker uploads, plus custom CSS themes for reskinning the client to match a community's branding.
• Self-hosting — Docker Compose deployment with a documented operator guide (setup, backups, upgrades); the client itself can connect to and switch between multiple self-hosted instances.
• Transparency — development happens in the open on GitHub, with an active public beta and a security bug bounty program.

Fluxer vs Discord, Slack, and Rocket.Chat

	Fluxer	Discord	Slack	Rocket.Chat
Core features	Chat, voice/video, moderation, custom themes	Chat, voice/video, huge bot/app ecosystem	Chat, huddles, deep work-app integrations	Chat, voice/video, compliance & admin tooling
Price	Free	Free, Nitro subscription for extras	Free tier; paid plans per user/month	Free community edition; paid enterprise tiers
Hosting	Self-hosted only (Docker)	Cloud only, no self-hosting	Cloud only, no self-hosting (even Enterprise Grid)	Self-hosted or Rocket.Chat cloud
License	AGPL-3.0 (open source)	Proprietary	Proprietary	MIT (community edition)

Pricing for the proprietary tools changes over time — treat the row above as directional, not a quote, and check each vendor's current pricing page before deciding.

Use cases

• Gaming clans and guilds that want a Discord-like space for voice, text, and community organization without handing their message history to a third party.
• Open-source project communities that want a self-hosted, ad-free hub for contributors and users, run on infrastructure they control.
• Privacy-conscious groups — friend groups, activist collectives, local clubs — who specifically don't want a company reading or monetizing their chat history.
• Small teams and creators who want Discord- or Slack-style chat without a per-seat subscription bill.
• Developers and tinkerers who want to audit the codebase, write custom bots against webhooks, or modify the client via custom CSS.

Limitations

• Fluxer is a young project (repository is only a few months old): voice/video needs direct port exposure or a TURN server behind most tunnels/proxies, the bot/integration ecosystem is far smaller than Discord's, and the AGPL-3.0 license requires anyone who modifies and distributes it (including as a hosted service) to release their source changes too.
• Discord cannot be self-hosted at all — your data lives on Discord's servers under its terms of service, and free accounts push Nitro upsells; moderation and account-suspension decisions are entirely out of your hands.
• Slack gets expensive per seat at scale, throttles searchable message history on the free tier, offers no self-hosting option at any tier, and isn't designed for the voice-first, drop-in-and-talk style that gaming and social communities expect.
• Rocket.Chat is heavier to operate (it needs MongoDB and more moving parts to self-host well), its UI feels more "enterprise" than "community," and several compliance and admin features are gated behind paid tiers.

Which one should you choose?

• Want a Discord look-alike you fully own and can self-host? Pick Fluxer — the Docker Compose setup is documented and production-capable, just plan your network setup for voice/video (direct ports or TURN) before go-live.
• Want the biggest bot ecosystem and don't mind a third party hosting your data? Discord remains the path of least resistance.
• Running a business team that lives in Google Workspace, Jira, or similar tools? Slack's integrations still outclass community chat platforms.
• Need compliance, SSO/LDAP, and admin controls at enterprise scale, with the option to self-host? Rocket.Chat is the more mature choice today.

FAQ

Is Fluxer a free, open-source alternative to Discord?

Yes. Fluxer is AGPL-3.0 licensed and free to self-host, with a Discord-like community-chat experience — messaging, voice/video, and moderation tools included.

Is Fluxer ready for self-hosting in production?

Yes for the core stack — there's a documented Docker Compose setup with backup and upgrade guides. The main thing to plan around is voice/video: it needs direct port exposure or a TURN server, since it doesn't work over a plain hostname tunnel.

Does Fluxer cost anything?

No — Fluxer itself is free and open source. You only pay for whatever server you choose to run it on.

What are the top open-source alternatives to Discord?

Browse more open-source alternatives to Discord, or explore the full Communication & Community category.

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Mise à jour par Maxime, le 25/07/2026.