Prometheus
Rocket.Chat
| Feature | Prometheus | Rocket.Chat |
|---|---|---|
| Pricing | Free only | Free / from $4/mo |
| Free Plan | ✓ Yes | ✓ Yes |
| Rating | 4.5 / 5 | 4.1 / 5 |
| Best For | devops-engineers, sre-teams, kubernetes-users, infrastructure-teams | security-conscious-organizations, government, self-hosters, enterprises |
| Founded | 2012 | 2015 |
| Metrics Collection | ✓ | ✗ |
| Alerting | ✓ | ✗ |
| Promql | ✓ | ✗ |
| Service Discovery | ✓ | ✗ |
| Grafana Integration | ✓ | ✗ |
| Multi Dimensional Data | ✓ | ✗ |
| Channels | ✗ | ✓ |
| Direct Messaging | ✗ | ✓ |
| Video Calls | ✗ | ✓ |
| Federation | ✗ | ✓ |
| E2e Encryption | ✗ | ✓ |
| Marketplace | ✗ | ✓ |
✓ Prometheus Pros
- Free and open-source
- Powerful query language
- Great Kubernetes integration
- Active community
✗ Prometheus Cons
- No built-in long-term storage
- Complex setup
- Steep learning curve
✓ Rocket.Chat Pros
- Fully open-source and self-hostable
- End-to-end encryption
- Federation support between instances
- Highly customizable
✗ Rocket.Chat Cons
- Self-hosted requires maintenance
- Mobile apps less polished than Slack
- Smaller app ecosystem
The Verdict
Prometheus is built for devops engineers and sre teams, with a focus on metrics-collection and alerting. Rocket.Chat targets security conscious organizations and government and leads with channels and direct-messaging.
Prometheus uses custom enterprise pricing, while Rocket.Chat starts at $4/mo — a tangible advantage for teams with a fixed budget.
Both offer free plans, so you can test each with your real workflow before committing to a subscription.
Prometheus edges out on user ratings (4.5 vs 4.1). While both are well-regarded, that gap reflects real differences in user satisfaction worth considering.
Bottom line: Prometheus has a slight overall edge — but if fully open-source and self-hostable matters most to you, Rocket.Chat may still be the right call.