Best monitoring tools in 2026
Check that services, hosts, networks and scheduled jobs are up and healthy, from inside and outside. This list has the top tools of each monitoring category, ranked by a published score. Of these, 10 are open source, 27 have a free plan and 16 can be self-hosted. Checked by hand on 30 September 2026.
How this list is ranked
Each active tool gets a score out of 100. Archived, end-of-sale and maintenance-only tools are left out.
- Capabilities: up to 75 points for the share of the category checklist that the tool's own documentation confirms. A tool meeting 8 of 10 items gets 60.
- Free to start: 15 points for a free plan or a free edition.
- Open or self-hostable: 10 points if it is open source or can be self-hosted.
Each category has a fixed checklist of capabilities (shown in the table below and on every tool page). An item counts only when the tool's own documentation confirms it; anything we could not confirm counts as not met. Checklists differ by category, so this list shows the top three of each category, each ranked against its own checklist. How long a tool has existed is deliberately not scored, so a new tool is not ranked below an older one for being new. Tools with the same score share a rank (shown as =), are listed A to Z within it, and the list never cuts between them. Nobody pays for a position.
Uptime and synthetic monitoring
The top of 40 uptime tools, ranked on the uptime checklist. See the full ranking.
- =1
Checkmate
Self-hosted open source monitor from BlueWave Labs for HTTP, ping, TCP port, DNS, WebSocket and gRPC checks, with an optional agent for server hardware metrics and status pages.
93 9 of 10 capabilities (68), free 15, open 10 - =1
Gatus
Health dashboard configured in YAML: checks HTTP, TCP, DNS, ICMP and other endpoints against conditions on status, body and latency, and alerts to many channels. Also sold as a hosted service.
93 9 of 10 capabilities (68), free 15, open 10 - =3
Better Stack
Observability suite that pairs uptime checks, logs and metrics with on-call schedules, escalation policies, phone and SMS alerts and hosted status pages.
90 10 of 10 capabilities (75), free 15, open 0 - =3
Checkly
Synthetic monitoring for developers: API checks and Playwright browser checks written as code, deployed from CI and run from many regions.
90 10 of 10 capabilities (75), free 15, open 0 - =3
Hyperping
Uptime, browser and cron job monitoring bundled with status pages and incident updates, plus a small server monitoring agent.
90 10 of 10 capabilities (75), free 15, open 0 - =3
Site24x7
Zoho's monitoring suite for websites, servers, networks, applications and cloud, with synthetic transactions and RUM; plain uptime checks have a free plan.
90 10 of 10 capabilities (75), free 15, open 0
Cron and heartbeat monitoring
The top of 12 cron and heartbeats tools, ranked on the cron and heartbeats checklist. See the full ranking.
- 1
Healthchecks.io
Cron job and heartbeat monitoring: each job pings a unique URL, and a missed or late ping sends an alert. The server is open source and can be self-hosted.
100 8 of 8 capabilities (75), free 15, open 10 - =2
cronalive
Heartbeat monitoring for cron jobs with HTTP uptime and TLS expiry checks, plus Laravel, Python and Node packages that create checks from code.
90 8 of 8 capabilities (75), free 15, open 0 - =2
Cronitor
Monitoring for cron jobs, background workers and scheduled tasks that tracks run duration and failures, plus website uptime checks and status pages.
90 8 of 8 capabilities (75), free 15, open 0 - =2
Drumbeats
Cron job, heartbeat and uptime monitoring with incident tracking and status pages, billed by check-in volume rather than monitor count.
90 8 of 8 capabilities (75), free 15, open 0 - =2
LastPing
Dead man's switch monitoring for cron jobs, CI pipelines and AI agents, with an MCP server so agents can set up their own monitors.
90 8 of 8 capabilities (75), free 15, open 0 - =2
Watchgoose
Heartbeat monitoring and status pages for cron jobs, backups and background workers, with an MCP server and free plans for open source projects.
90 8 of 8 capabilities (75), free 15, open 0
Server and infrastructure monitoring
The top of 31 infrastructure tools, ranked on the infrastructure checklist. See the full ranking.
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Checkmk
Infrastructure monitoring for servers, networks, cloud and containers with automatic service discovery; the base edition is open source and paid editions add more.
100 10 of 10 capabilities (75), free 15, open 10 - =1
Netdata
Per-second metrics for servers, containers and applications from an agent with built-in dashboards and alerts, plus the optional hosted Netdata Cloud.
100 10 of 10 capabilities (75), free 15, open 10 - =1
Zabbix
Open source monitoring for networks, servers, VMs, applications and cloud, using agents, SNMP and templates with trigger-based alerting; Zabbix Cloud is the hosted option.
100 10 of 10 capabilities (75), free 15, open 10
Network monitoring
The top of 29 network tools, ranked on the network checklist. See the full ranking.
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LibreNMS
Network monitoring system with automatic SNMP discovery, graphs and alerting, supporting a long list of network hardware vendors.
100 10 of 10 capabilities (75), free 15, open 10 - =1
ManageEngine OpManager
On-premises network and server monitoring for routers, switches, firewalls, Windows and Linux hosts and virtual machines.
100 10 of 10 capabilities (75), free 15, open 10 - =3
Observium
Network monitoring platform with SNMP auto-discovery of devices; a free Community Edition and a paid Professional edition with faster updates.
93 9 of 10 capabilities (68), free 15, open 10 - =3
PRTG Network Monitor
Windows-based network and server monitoring from Paessler built around sensors for SNMP, WMI, flows, ping and HTTP, with maps and dashboards.
93 9 of 10 capabilities (68), free 15, open 10
Database monitoring
The top of 19 databases tools, ranked on the databases checklist. See the full ranking.
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ClusterControl
Severalnines platform to deploy, monitor and manage open source database clusters such as MySQL, PostgreSQL, MongoDB and Redis on your own servers or cloud.
93 9 of 10 capabilities (68), free 15, open 10 - =1
Percona Monitoring and Management
Open source monitoring for MySQL, PostgreSQL, MongoDB and Valkey: a server and client agents collect metrics and query analytics, with Grafana-based dashboards and alerting.
93 9 of 10 capabilities (68), free 15, open 10 - 3
Redgate Monitor
Database estate monitoring for SQL Server, PostgreSQL, Oracle and MySQL (formerly SQL Monitor), with query performance history, alerting and estate-wide health views.
85 10 of 10 capabilities (75), free 0, open 10
Kubernetes and container monitoring
The top of 25 kubernetes tools, ranked on the kubernetes checklist. See the full ranking.
- 1
Coroot
Open source observability that uses eBPF to build service maps and collect metrics, logs, traces and profiles without code changes, with root-cause hints.
93 9 of 10 capabilities (68), free 15, open 10 - =2
groundcover
Kubernetes observability that uses an eBPF sensor and runs in your own cloud account, covering logs, traces, metrics and APM without code changes.
85 8 of 10 capabilities (60), free 15, open 10 - =2
Robusta
Kubernetes alert enrichment and routing on top of Prometheus: adds pod logs, events and graphs to alerts and sends them to Slack, Teams and other sinks. Open source core plus a paid SaaS.
85 8 of 10 capabilities (60), free 15, open 10
Cloud provider monitoring
The top of 11 cloud tools, ranked on the cloud checklist. See the full ranking.
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Amazon CloudWatch
AWS's native monitoring service: collects metrics and logs from AWS services and your apps, with alarms, dashboards, synthetic canaries and application signals.
90 10 of 10 capabilities (75), free 15, open 0 - =1
Azure Monitor
Microsoft Azure's monitoring service for metrics, logs and traces from Azure resources and apps, including Application Insights, Log Analytics, alerts and managed Prometheus.
90 10 of 10 capabilities (75), free 15, open 0 - 3
Google Cloud Observability
Google Cloud's suite (formerly Stackdriver) of Cloud Monitoring, Logging and Trace for metrics, logs, uptime checks and alerting on Google Cloud and other environments.
83 9 of 10 capabilities (68), free 15, open 0
Side by side
| Tool | Pricing | Free plan | Open source | Self-hosted |
|---|---|---|---|---|
| Checkmate | Free | Yes | Yes | Yes |
| Gatus | Free plan | Yes | Yes | Yes |
| Better Stack | Free plan | 10 monitors and heartbeats, 1 status page | No | No |
| Checkly | Free plan | 1 user, 10k API and 1k browser check runs/mo | No | No |
| Hyperping | Free plan | 20 monitors, 5-min checks | No | No |
| Site24x7 | Free plan | Uptime checks for 50 resources, email alerts | No | No |
| Healthchecks.io | Free plan | 20 jobs | Yes | Yes |
| cronalive | Free plan | 10 checks, 5-min HTTP interval, 50k pings/mo | No | No |
| Cronitor | Free plan | 5 monitors, email and Slack alerts | No | No |
| Drumbeats | Free plan | 200K check-ins (beats)/mo | No | No |
| LastPing | Free plan | Free for individuals | No | No |
| Watchgoose | Free plan | 10 checks, 1 user | No | No |
| Checkmk | Free plan | Yes | Yes | Yes |
| Netdata | Free plan | 5 nodes, non-commercial use | Yes | Yes |
| Zabbix | Free plan | Yes | Yes | Yes |
| LibreNMS | Free | Yes | Yes | Yes |
| ManageEngine OpManager | Free plan | Free edition: 3 devices | No | Yes |
| Observium | Free plan | Yes | No | Yes |
| PRTG Network Monitor | Free plan | Freeware edition: 100 sensors | No | Yes |
| ClusterControl | Free plan | Community edition: deploy and monitor clusters | No | Yes |
| Percona Monitoring and Management | Free | Yes | Yes | Yes |
| Redgate Monitor | Paid | No | No | Yes |
| Coroot | Free plan | Yes | Yes | Yes |
| groundcover | Free plan | Yes | No | Yes |
| Robusta | Free plan | Yes | Yes | Yes |
| Amazon CloudWatch | Free plan | 10 custom metrics, 10 alarms, 5 GB logs per month | No | No |
| Azure Monitor | Free plan | Yes | No | No |
| Google Cloud Observability | Free plan | 150 MiB metrics per billing account, 50 GiB logs/project | No | No |
Plans and prices change; check each tool's own site before you decide.