Uptime Cairn

6.7easy start · #39of 55
in Website Monitoring Software

Free to practise onyes
Free trialno
Well documentedyes
Runs where you workno

Runs on api, Linux, self-hosted, Web.

Uptime Cairn is ranked #39 of 55 in website monitoring software on The Geeks Club. It runs on API, Linux, Self-hosted, Web. There is a free plan.

Uptime Cairn plans and pricing

All plans

Free Free Free, open source, self-hosted; no per-monitor pricing uptimecairn.dev · 9 Oct 2026

Compared on website monitoring software

Free plan: Yes
Check types: http
SSL monitoring: Yes
Latency monitoring: Yes
Page health checks: Yes
Status page: Yes
Maintenance windows: Yes
API access: Yes

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The record

Purpose: Uptime Cairn monitors websites and servers and tells you when they go down.
Deployment: It is self-hosted and runs as one Docker container with one data file and no separate database server.
Checks: It checks HTTP and HTTPS, TCP, ICMP, DNS, TLS and domain expiry, push heartbeats, Docker containers, and gRPC services.
Alerts: Alert channels include email, webhooks, Slack, Discord, Telegram, Matrix, Gotify, ntfy, Pushover, Microsoft Teams, Mattermost, Google Chat, PagerDuty, Opsgenie, Twilio/SMS, and Apprise.
Status pages: Public status pages support custom domains and branding, uptime history from 7 to 365 days, and email or webhook subscribers with double opt-in.
API: The product provides a REST API that can script the actions available in the interface.
Reports: Scheduled branded reports can be generated as PDF, HTML, CSV, and JSON and delivered by email, Slack, webhook, or an S3 drop.
Incidents: Incidents can open from failing checks and include an update timeline and acknowledgement.
Scale: The product site describes 5,000 monitors on one install and 250 checks per second at a 20-second interval.
Limitations: The site says there is no hosted tier, and multi-region probing, SSO, and synthetic browser flows have not shipped.
Intended users: The site describes it as a fit for people who self-host, want data on their own infrastructure, or need a write API and branded status pages.
License: Uptime Cairn is released under Apache 2.0, and the site says no feature is held back for a paid tier.
Price from: Free

Where it ranks on The Geeks Club

Best Website Monitoring Software in 2026#39 of 55

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Sources

uptimecairn.dev· checked 9 Oct 2026