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Home/Categories/Communication & Collaboration/SpacebarChat
icon of SpacebarChat

SpacebarChat

Open source alternative to Slack, Microsoft Teams and Google Chat

Host Discord-style chat on your own infrastructure with an AGPL-licensed backend that works with many existing bots, apps, and clients.

2.2K starsTypeScriptAGPL-3.0Active recently
Visit websiteGitHub repo
image of SpacebarChat
Contents
  1. 01Who SpacebarChat is for
  2. 02The problem it solves
  3. 03How it solves it
  4. 04Strengths and trade-offs
  5. 05Tech stack
  6. 06FAQ
  7. 07Similar open-source tools
TL;DR

SpacebarChat is an AGPL-licensed self-hosted Discord backend for teams and communities that want familiar chat flows without handing hosting to a proprietary vendor.AGPL-3.0 · TypeScript · 2.2K stars · Active recently

who it's for

Who SpacebarChat is for#

Communities replacing Discord with infrastructure they control

SpacebarChat fits communities that want Discord-style channels, bots, and moderation patterns but need the service to run on infrastructure they choose and manage.

Skip if:

You want a fully managed hosted chat product with no responsibility for deployment, security, or upgrades.

Internal teams building self-hosted real-time communication

SpacebarChat works for internal teams that need a chat backend with familiar client behavior, room for customization, and direct control over security posture and data location.

Skip if:

Your team prefers a paid commercial suite like Slack or Microsoft Teams specifically to avoid running chat infrastructure.

the problem

The problem it solves#

Hosted chat products can make community communication depend on one vendor account, one moderation surface, and one deployment model. Teams that want Discord-style channels, bots, and client familiarity often still need control over data location, security posture, upgrade timing, and custom integrations. SpacebarChat exists for operators who want that familiar model on infrastructure they control instead of being locked into a proprietary hosted service.

how SpacebarChat solves it

How it solves it#

Discord-compatible backend services

The server repository includes the HTTP API, WebSocket gateway, CDN service, WebRTC service, utility models, and admin tooling needed to run a Discord-style communication backend.

Self-hosted deployment documentation

The official docs cover server setup, client setup, bot setup, configuration, and security, which gives operators a documented path to run SpacebarChat on their own infrastructure.

Backward-compatibility goal for clients and bots

The maintainers explicitly aim for backward compatibility with existing bots, applications, and many Discord-style clients so teams can reuse familiar workflows instead of retraining everyone from scratch.

strengths · trade-offs

Strengths and trade-offs#

Strengths

  • Keeps deployment and data control with the operatorSpacebarChat gives communities and teams a way to run real-time communication on infrastructure they control, which is the main advantage over hosted proprietary chat products.
  • Preserves a familiar Discord-like workflowBecause the project targets the Discord backend model and aims for compatibility with existing bots, applications, and clients, it can be easier to evaluate than a totally different chat stack.

Trade-offs

  • -Self-hosting and compatibility still require operational workSpacebarChat is strongest for teams that can own deployment, security hardening, upgrades, and troubleshooting. The project also notes that some client incompatibilities still exist, so operators should test their required workflows before committing.
tech stack · detected from GitHub

What it's built on#

Languages
C#JavaScriptTypeScript
Frameworks
Express
Databases
PostgreSQL
Messaging
RabbitMQ
frequently asked

FAQ#

Is SpacebarChat open source?

Yes. The SpacebarChat server repository is published under AGPL-3.0, and the project positions itself as a free open source self-hostable chat, voice, and video platform.

Can SpacebarChat work with existing Discord bots and clients?

The maintainers say they aim for backward compatibility with existing bots, applications, and many Discord-style clients. They also note that some incompatibilities still exist, so production teams should test the exact clients and bot workflows they rely on.

What do operators need to run SpacebarChat?

The official docs describe a setup centered on API, gateway, and CDN services, plus configuration and security guidance. SpacebarChat is intended for operators with terminal access and real self-hosting ownership rather than a one-click hosted deployment.

also worth a look

Similar open-source tools#

Prose

Prose

Decentralized open source workplace with chat and docs

56VueMPL-2.0
Adapt

Adapt

Lightweight self-hosted messaging platform for teams

13TypeScriptAGPL-3.0
Rocket.Chat

Rocket.Chat

Self-hosted team chat with voice, video, and omnichannel support

45.3KTypeScriptMIT
Converse.js

Converse.js

Self-hosted web-based XMPP chat client for any server

3.3KJavaScriptMPL-2.0
Revolt

Revolt

Self-hosted open source Discord alternative with servers

3.1KRustAGPL-3.0
Matrix

Matrix

Open protocol for secure, decentralized messaging and VoIP

4.3KPythonAGPL-3.0

Repository

Stars
2.2K
Forks
306
License
AGPL-3.0
Last commit
36 days ago
Last verified
Jun 12, 2026
Repo
spacebarchat/server ↗

Additional details

Language
TypeScript
Open issues
203
Contributors
100
First release
2020

Categories

Communication & CollaborationIT ManagementWeb Development

Tags

ChatSelf HostedSecurityOpen CoreFile SharingWebSocket ServersDeveloper Tools