Checkmate is an open-source infrastructure monitoring platform maintained by Bluewave Labs and the community. It sits between commercial SaaS monitoring tools and a self-managed Prometheus/Grafana stack. Its focus is on a “monitoring stack you own”: self-hosted, AGPL-3.0 open source, no per-monitor pricing, and monitoring data that stays within the user’s own infrastructure.
Checkmate covers a broad range of monitoring types, including HTTP, Ping, TCP, gRPC, WebSocket, DNS, SSL, PageSpeed, Infra, Docker, and Game monitoring. It can be used to monitor website/API availability, response times, page performance, server CPU/memory/disk/network metrics, Docker container health and restart events, and game servers such as Minecraft, CS2, and Valheim. For alerts, it supports Email, Slack, Discord, and Webhooks, with Telegram also listed among integrations. It also provides public status pages, team invitations, and role-based access control. Global availability monitoring is powered by GlobalPing and spans six continents.
Checkmate explicitly supports deployment via Docker, Helm, and bare metal, making it suitable for teams that want to run their monitoring system inside a private network or their own cloud environment. The project is hosted on GitHub; the reviewed page shows around 9.9k stars, 1.1k forks, and 145 contributors. It is licensed under AGPL-3.0, so the code can be read, audited, and forked. The documentation is fairly complete, covering topics such as quick start, Uptime, PageSpeed, infrastructure monitoring, alerts, notifications, status pages, maintenance windows, team management, and configuration. It also highlights that users can create their first monitor in 5 minutes.
The reviewed page does not provide pricing for a commercial or hosted version, but it clearly emphasizes “No per-monitor pricing” and criticizes tools such as Datadog and PagerDuty for becoming expensive at scale due to host-based and feature-based pricing. Its value mainly comes from being self-hosted and open source: when the number of monitored targets grows, the marginal cost is low. However, users are responsible for the server, maintenance, upgrades, and backups.
Its strengths are clear deployment options, a wide range of monitoring types, controllable data boundaries, and a reasonably active community. It is well suited to small and mid-sized teams, SRE/DevOps users, and organizations that care about compliance or private-network deployment. The downsides are that the reviewed page provides limited detail on commercial support, SLA, hosted services, and API/SDK specifics. Compared with mature SaaS products, users also need to ensure the reliability of the monitoring system itself.
The reviewed page does not provide information about access from mainland China, mirrors, payment, or compliance. Access to the official website and GitHub needs to be tested directly, so the status is unknown. If network access is restricted, similar self-hosted options such as Prometheus + Grafana + Alertmanager or Uptime Kuma may be worth considering. If fully managed service and enterprise support are required, it can be compared with Datadog, PagerDuty, and similar platforms.
⚠ This review is compiled from public sources and does not constitute a purchase recommendation. Verify all facts on the vendor's official site. Verify on checkmate.so official site.
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