Prometheus
Proton VPN
| Feature | Prometheus | Proton VPN |
|---|---|---|
| Pricing | Free only | Free / from $9.99/mo |
| Free Plan | ✓ Yes | ✓ Yes |
| Rating | 4.5 / 5 | 4.5 / 5 |
| Best For | devops-engineers, sre-teams, kubernetes-users, infrastructure-teams | privacy-advocates, journalists, remote-workers, travelers |
| Founded | 2012 | 2017 |
| Metrics Collection | ✓ | ✗ |
| Alerting | ✓ | ✗ |
| Promql | ✓ | ✗ |
| Service Discovery | ✓ | ✗ |
| Grafana Integration | ✓ | ✗ |
| Multi Dimensional Data | ✓ | ✗ |
| No Logs Vpn | ✗ | ✓ |
| Kill Switch | ✗ | ✓ |
| Split Tunneling | ✗ | ✓ |
| Secure Core | ✗ | ✓ |
| Tor Over Vpn | ✗ | ✓ |
| Netshield | ✗ | ✓ |
✓ 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
✓ Proton VPN Pros
- Strong no-logs policy
- Swiss jurisdiction
- Open-source apps
- Free tier available
✗ Proton VPN Cons
- Free plan limited servers
- Slower than some competitors
- Fewer server locations
The Verdict
Prometheus is built for devops engineers and sre teams, with a focus on metrics-collection and alerting. Proton VPN targets privacy advocates and journalists and leads with no-logs-vpn and kill-switch.
Prometheus uses custom enterprise pricing, while Proton VPN starts at $9.99/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.
This is a genuinely close comparison. If you can, sign up for both free trials (where available) and run a one-week test with your actual team tasks before deciding.