Checkmate vs Sensu Go

Checkmate is a free, open-source, self-hosted dashboard for monitoring infrastructure, service uptime, PageSpeed, and incidents. It checks HTTP, ping, TCP, gRPC, WebSocket, DNS, SSL, and more than 100 game server types. Its Capture agent reports server CPU, memory, disk, temperature, and network metrics, while PageSpeed monitoring tracks Lighthouse scores and Core Web Vitals over time. Public status dashboards can show per-service uptime and incident history with custom branding. Alerts can go to email, Slack, Discord, Telegram, Twilio SMS, Pushover, ntfy, Matrix, Rocket.Chat, PagerDuty, Microsoft Teams, and webhooks. The maker says metrics, logs, incidents, and user accounts remain in the database configured by the operator, with no phone-home or telemetry pipeline. Checkmate is licensed under AGPL-3.0 and can be installed with Docker Compose or Kubernetes/Helm; its image runs on x86, Apple Silicon, and Raspberry Pi. The maker says the API accepts JSON for bulk monitor setup and provides a REST API reference. The free plan includes all features, no monitor limits, self-hosting, and 12 alert channels. There is no one-click migration import or paid support tier.

Sensu Go is a commercial monitoring and observability solution for enterprise DevOps and SRE teams overseeing infrastructure from Kubernetes to bare metal. It collects, filters, and transforms monitoring events before sending them to a database chosen by the customer. Teams can manage declarative monitoring configuration, check system and service health, collect metrics and logs, and run custom scripts including Nagios-style plugins. Agents discover virtual machines, public cloud compute instances, containers, and services. Sensu can alert by email, Slack, or SMS, create or resolve incidents in PagerDuty, ServiceNow, and JIRA, and deduplicate alerts. It also supports remediation actions such as restarting services or running scripts. Sensu Go is self-hosted and free for up to 100 nodes at one site. Pro costs $36 per year, billed annually, with a 100-node minimum; this equals $3.00 per node/month when billed annually. The free 14-day trial is for evaluating beyond 100 nodes. The backend is unsupported on Windows and macOS.