Rocket.Chat vs Spacebar
| Tagline | Fully customizable open-source communications platform and Slack alternative | Open-source, Discord-compatible chat backend you can self-host |
| Category | Team Chat & Collaboration | Team Chat & Collaboration |
| Replaces | Slack, Microsoft Teams, Discord | Discord |
| GitHub stars | 46k | 2.2k |
| Language | TypeScript | TypeScript |
| License | MIT | AGPL-3.0 |
| Self-host difficulty | 3/5 Moderate | 4/5 Involved |
| Deploy options | One-Click Docker Docker Compose Kubernetes Manual | Docker Manual |
| Managed hosting | ||
| Last updated | yesterday | 3 days ago |
| View repo | View repo |
Where each falls short
The honest trade-offs — what you give up with each, versus the proprietary tools they replace.
Rocket.Chat
- Resource-heavy (Node.js + MongoDB) and can be slow at scale on modest hardware
- Some enterprise features (engagement dashboard, scalability, advanced auth) require a paid plan
- UI can feel cluttered compared to Slack
- Mobile apps have historically lagged the web client in polish
Spacebar
- Still alpha/beta quality; not feature-complete or stable for production communities
- Voice/video support is incomplete or experimental
- Documentation and setup are rough and aimed at technical users
- No official polished first-party client; relies on Discord-compatible clients
Bottom line
Choose Rocket.Chat if you want the lower-effort setup; choose Rocket.Chat for the larger community and ecosystem. Rocket.Chat has seen more recent development. Open each guide below for deploy steps and the full feature gap.
Rocket.Chat
Fully customizable open-source communications platform and Slack alternative