Lists for 2026
Every category as a list: all the tools, the best by a published score, and the open source, free plan and self-hosted ones. Built from the same hand-checked data as the rest of the directory.
Observability
| Category | All | Best | Open source | Free plan | Self-hosted |
|---|---|---|---|---|---|
| All observability | 170 | 47 | 71 | 131 | 96 |
| Observability platforms | 22 | 11 | 7 | 16 | 9 |
| Metrics and time-series databases | 11 | 5 | 9 | 10 | 9 |
| Log management | 25 | 11 | 13 | 21 | 17 |
| Tracing and APM | 22 | 10 | 8 | 17 | 11 |
| Error and crash tracking | 22 | 11 | - | 16 | 7 |
| Continuous profiling | 13 | 5 | 8 | 10 | 9 |
| Real user monitoring and session replay | 28 | 12 | 5 | 14 | 6 |
| OpenTelemetry and telemetry pipelines | 22 | 12 | 14 | 19 | 17 |
| Dashboards and visualization | 9 | 5 | 7 | 7 | 7 |
| LLM and AI observability | 22 | 14 | 11 | - | 20 |
Monitoring
| Category | All | Best | Open source | Free plan | Self-hosted |
|---|---|---|---|---|---|
| All monitoring | 151 | 28 | 67 | 115 | 89 |
| Uptime and synthetic monitoring | 40 | 10 | 10 | 30 | 10 |
| Cron and heartbeat monitoring | 12 | 6 | - | - | - |
| Server and infrastructure monitoring | 31 | 14 | 20 | 26 | 25 |
| Network monitoring | 29 | 11 | 13 | 18 | 23 |
| Database monitoring | 19 | 12 | 8 | 9 | 18 |
| Kubernetes and container monitoring | 25 | 14 | 21 | 23 | 23 |
| Cloud provider monitoring | 11 | 5 | - | 9 | - |
Alerting
| Category | All | Best | Open source | Free plan | Self-hosted |
|---|---|---|---|---|---|
| All alerting | 92 | 19 | 38 | 58 | 39 |
| Alert routing and correlation | 9 | 5 | 7 | 7 | 7 |
| Notification delivery | 14 | 5 | 11 | 13 | 11 |
| On-call and alert escalation | 30 | 10 | 5 | 17 | 5 |
| Incident management | 20 | 10 | 8 | 10 | 8 |
| Status pages | 23 | 11 | 8 | 15 | 9 |