Updated August 2026
Best open-source Discord alternatives in 2026
Not all open-source chat platforms are trying to do the same thing. Some optimize for federation, some for voice, some for self-hosting. We compared five real options using their current official product pages and documentation, so the tradeoffs are clear.
Last reviewed: By StoatBoard Editorial5 min read
TL;DR
- → Stoat if you want the closest Discord-like community experience (open-source, free, active)
- → Matrix/Element if you care about federation and protocol-level openness
- → Mumble if you only need low-latency voice
- → Rocket.Chat if it's for a business/workplace context
Quick comparison — 2026
| Platform | Open-source | Best for |
|---|---|---|
| Stoat (formerly Revolt) | ✅ Yes | Best for Discord-like communities |
| Matrix / Element | ✅ Yes | Best for federated/technical users |
| Spacebar | ✅ Yes | Best for self-hosted experiments |
| Mumble | ✅ Yes | Best for low-latency voice only |
| Rocket.Chat | ✅ Yes | Best for business/enterprise teams |
1. Stoat (formerly Revolt) — Best overall
- ✓Closest to Discord's UX: servers, channels, roles, voice
- ✓Open-source client and server (self-hostable)
- ✓Public source code and an official self-hosting option
- ✓Active public server ecosystem discoverable via StoatBoard
- ✓Mobile apps on iOS and Android
- ✓Free to use — no Nitro equivalent required for core features
- ✗Smaller user base than Discord
- ✗Fewer third-party bots/integrations
2. Matrix / Element — Best for federation
- ✓Fully decentralized, federated protocol
- ✓Self-host your own homeserver (Synapse or Conduit)
- ✓End-to-end encryption by default
- ✓Bridges to Discord, Slack, IRC, Telegram
- ✓Large existing user base in developer/privacy communities
- ✗Complex onboarding for non-technical users
- ✗Room/Space model is less intuitive than Discord servers
3. Spacebar — Best for self-hosted experiments
- ✓Open-source reimplementation of Discord's API
- ✓Compatible with many Discord clients
- ✓Great for experimenting with self-hosted Discord-like setups
- ✗Very small public community
- ✗Not production-ready for large servers
- ✗Limited mobile support
4. Mumble — Best for pure voice
- ✓Extremely low latency voice chat
- ✓Lightweight and battle-tested
- ✓Popular in gaming communities for 15+ years
- ✓Very low server resource requirements
- ✗Text channels are very basic
- ✗No community discovery features
- ✗Not a full Discord replacement
Why most "best alternatives" lists fail
Most listicles bundle together completely different tools: Slack (workplace), Discord (gaming/community), Zoom (video), and random forum software. That's not useful if you're looking for something that actually replaces Discord for a community context.
The honest answer in 2026: if you want a community platform with servers and channels, Stoat is the most direct alternative. If you want a federated protocol, Matrix. If you want a business tool, Rocket.Chat. They're not competing for the same use case.
What changed in 2026
These products keep changing. Stoat, previously known as Revolt, added video chat and screen sharing in July 2026, while the other projects continue to evolve their clients, hosting options, and pricing. That is why this comparison records a review date and links to primary sources instead of presenting feature claims as timeless facts.
Sources and methodology
We compare the community model, open-source availability, mobile support, voice features, and self-hosting using each project's official documentation. Product fit is an editorial assessment; feature availability comes from the linked primary sources.
Frequently asked questions
Which open-source Discord alternative is best for communities?
It depends on the community. Stoat is the closest match for a familiar server-and-channel experience, Matrix/Element prioritizes federation, Mumble focuses on voice, and Rocket.Chat is aimed more at organizations and workplaces.
Is Stoat really open-source?
Yes. Stoat's client and server code is open-source and available on GitHub. The hosted version at stoat.chat is run by the developers, but anyone can self-host the platform. This is different from Discord, which is fully proprietary.
What happened to Revolt chat?
Revolt rebranded to Stoat in 2025/2026. The platform, codebase, and community are the same — only the name changed. Users searching for 'Revolt servers' or 'Revolt chat alternative' will find the same product under the Stoat name.
Is Matrix / Element a good Discord alternative for communities?
Matrix and Element are excellent for technical users who value decentralization and protocol-level interoperability. However, for typical Discord communities, the onboarding complexity and unfamiliar UX model makes it harder to migrate members. Stoat is usually more accessible for community owners.
Can I self-host a Discord alternative?
Yes. Several open-source Discord alternatives support self-hosting including Stoat (formerly Revolt), Matrix/Element, Spacebar, and Rocket.Chat. Self-hosting gives you full data control but requires server maintenance. Most community owners use the hosted versions instead.
Browse active Stoat communities right now
If Stoat is the right pick for your use case, the next step is to see the actual communities already active on the platform — not just read about it.