Uptime Cairn
Uptime Cairn: A broad, free self-hosted monitor for websites, infrastructure, services, and scheduled jobs. Ranked #10 of 55 in Website Monitoring Software by our editors (8.4/10); pricing: Free plan; best for free self-hosted monitoring with broad checks.
At a glance
- Editor score8.4 / 10
- PricingFree plan
- Best forFree self-hosted monitoring with broad checks
- Free planYes
- Paid fromFree
- Check typesHttp
- Facts checked20 Sep 2026
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
Our verdict on Uptime Cairn
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.
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Uptime Cairn pricing
Uptime Cairn fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Check types | Http |
| SSL monitoring | Yes |
| Latency monitoring | Yes |
| Page health checks | Yes |
| Status page | Yes |
| Maintenance windows | Yes |
| API access | Yes |
| Deployment | Desktop, Self-hosted |
| Platforms | Linux |
| Integrations | 14 integrations: Email/SMTP, Webhooks, Slack, Discord, Telegram, Matrix … |
| Pricing | Free plan |
| Website | uptimecairn.dev |
| Facts checked | 20 Sep 2026 |
Uptime Cairn integrations
Uptime Cairn lists 14 integrations on its own site.
- Email/SMTP
- Webhooks
- Slack
- Discord
- Telegram
- Matrix
- Gotify
- ntfy
- Microsoft Teams
- PagerDuty
- Opsgenie
- Twilio SMS
- Apprise
- Docker API
Alternatives to Uptime Cairn
- SolidPingBroad website and infrastructure monitoring with self-hosting, hosted plans, and on-call workflows.9.3
- HostTrackerA broad monitoring platform with low-cost entry pricing and extensive infrastructure coverage.9.2
- UptimiaA broad monitoring suite with distributed checks, automation and a free starting point.9.1
See all Uptime Cairn alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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