Uptime Cairn review
A broad, free self-hosted monitor for websites, infrastructure, services, and scheduled jobs.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Uptime Cairn is an open-source, self-hosted monitoring application from Webloom Labs for teams that need to watch websites, servers, network endpoints, services, and scheduled processes. It runs as a single binary or Docker container, uses SQLite storage, and provides a web dashboard for monitoring and incidents. Its audience includes developers, infrastructure teams, and organizations that want control over deployment and data while keeping monitoring costs at zero.
The main strength is breadth across different check types. HTTP and HTTPS monitors can evaluate status codes, keywords, JSON paths, and response times, while TCP, ICMP, DNS, TLS certificate, and domain-registration checks cover common availability and expiry concerns. Uptime Cairn also monitors Docker containers and gRPC health, and its push monitors can track cron jobs, backups, and batch processes. Public status pages add uptime history, incidents, custom branding, and subscriber notifications. Scheduled maintenance windows and dependency suppression help reduce alerts during planned work.
Alerting and automation are similarly broad. The product supports email, webhooks, Slack, Discord, Telegram, Matrix, Gotify, ntfy, Microsoft Teams, PagerDuty, Opsgenie, Twilio SMS, Apprise, and other channels. A REST API with scoped bearer-key authentication supports controlled programmatic access. According to its published product details, features are not restricted to a paid tier, and the project is distributed under Apache 2.0. Choose Uptime Cairn if free, self-hosted monitoring and varied checks matter more than managed operations. A hosted service may suit teams that do not want to deploy and maintain monitoring infrastructure.
Uptime Cairn pros and cons
- Where it wins
- Covers HTTP assertions, DNS, TLS, ports, containers, gRPC, and cron jobs
- Includes status pages, incidents, maintenance windows, and dependency suppression
- Supports scoped API access and many alert channels, including Slack and PagerDuty
- Where it doesn't
- Self-hosted deployment leaves infrastructure and ongoing maintenance to your team
- Requires Linux or a self-hosted environment rather than a hosted monitoring service
- No AI features for analysis, recommendations, or automated workflows
Uptime Cairn fact sheet, pricing and score →
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