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Oh Dear alternative? Uptime green is not Core Web Vitals portfolio monitoring

The uptime dashboard is green, SSL is fine, and the status page is quiet, yet a client still forwards a PageSpeed Insights screenshot where mobile Largest Contentful Paint sits in Needs improvement. Nobody can explain how both truths coexist. Searching for an Oh Dear alternative feels like the next step, but that query usually returns more uptime and white-label status products, not a Core Web…

A client forwarded a PageSpeed Insights screenshot showing mobile Largest Contentful Paint (LCP) at "Needs improvement," even though the uptime dashboard remained green, SSL was fine, and the status page was quiet. Many searchers looking for an "Oh Dear alternative" are led to other uptime suites instead of a Core Web Vitals (CWV) portfolio monitor.

The two metrics—uptime and CWV—are distinct and cannot be conflated. While uptime indicates whether a site responded successfully, CWV measures how real users experienced load and interactivity. Uptime monitors cannot detect issues like late LCP images, blocked main threads, or shifted layout elements that affect the user experience.

Core Web Vitals focuses on actual field data and lab throttling, while uptime focuses on reachability. Agencies often use Oh Dear, a suite that covers uptime checks, SSL, DNS health, broken-link crawls, and status pages, along with occasional daily Lighthouse scores. However, they do not provide a comprehensive CWV portfolio monitor.

When selecting a tool, differentiate between uptime and CWV, as the same "healthy" green status can mask different risks. For a full picture of performance, agencies should maintain an uptime suite and add a dedicated CWV portfolio layer.

Written by urgent.news from Dev.to's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.

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