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Uptime Cairn vs Yottaa Real User Monitoring

Both stand on website monitoring software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.

Uptime Cairn

Free plan APILinuxSelf-hosted+1

Uptime Cairn offers broad monitoring, alerting, reporting, and status-page features in a self-hosted package. Its lack of a hosted tier and the listed unshipped features matter if you need those capabilities.

Visit Uptime Cairn

Yottaa Real User Monitoring

Free plan APIWeb

Choose Yottaa Real User Monitoring if your commerce team needs performance visibility across the full delivery path, including route-level metrics and Core Web Vitals. Free diagnostics are available without a credit card. Check the package details if your retention needs extend beyond the listed 90+ days or depend on a specific historical-data window.

Visit Yottaa Real User Monitoring

The facts

Uptime CairnYottaa Real User Monitoring
Free planYesYes
Open sourceNot publishedNot published
Runs onAPI, Linux, Self-hosted, WebAPI, Web
Lowest paid planFree or on requestYottaa Starter: $12,000 a year
Plans published16
MakerNot publishedNot published
Websiteuptimecairn.devyottaa.com
On website monitoring software#18 of 55#38 of 55

Uptime Cairn: what it does well

  • Supports a wide range of network and service checks.
  • Status pages allow custom domains and branding.
  • Provides a REST API and scheduled reports.
  • No features are held back for a paid tier.

What to know first

  • There is no hosted tier.
  • Multi-region probing, SSO, and synthetic browser flows have not shipped.
  • The site recommends a reverse proxy before internet exposure.

Yottaa Real User Monitoring: what it does well

  • Connects browser, edge, and origin performance data.
  • Breaks down LCP, INP, and CLS by page and element.
  • Reports soft navigation metrics for single-page applications.
  • Lists native integrations with GA4, Adobe Analytics, and Shopify Analytics.
  • Provides REST API and MCP server access to performance data.

What to know first

  • Request data setup uses Fastly real-time log streaming.
  • Historical retention varies by package.

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