Closest to Instatus
OpenStatus is a status page and uptime monitor with checks from 28 regions, an API, Terraform, and a CLI. Uptime Kuma is a lightweight self-hosted monitor with status pages and 90+ notification integrations, and Gatus offers automated status pages with many check types.
Broader platforms
OneUptime combines monitoring, incident management, and status pages. Tianji bundles analytics, uptime, server status, and status pages in one deployable, and StatusScout adds security checks and broken link detection.
Lighter tools
Kener is a Svelte status page with Docker deployment, Peekaping monitors websites, databases, and queues with 15+ notification channels, and EasyMonitor does HTTP and ICMP monitoring with status pages. Statusnook is a status page system, and Uptimepage is primarily a hosted service with on-call scheduling.
Important: licenses and maintenance
Cachet uses its own source-available license, StatusScout uses StatusScout License 2.0, and OneUptime keeps enterprise features in separate directories. Statusnook's last commit was in October 2024.
License details
Uptime Kuma, Kener, Peekaping, EasyMonitor, and Statusnook are MIT. Gatus and Tianji are Apache-2.0. OpenStatus and Uptimepage are AGPL-3.0.
Maintenance status
Most had commits within weeks of this update.