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Compare

Core Web Vitals Test vs PostHog

PostHog includes product analytics and session replay, not a Chrome-based Core Web Vitals checker
Core Web Vitals TestCheck Core Web Vitals and compare metrics for desktop and mobile devices.PostHogProduct analytics, session replay and feature flags

Which to pick

Pick Core Web Vitals Test if you want…

  • Instant Core Web Vitals metrics in Chrome
  • A free tool

Pick PostHog if you want…

  • Unified product analytics with AI assistance
  • Product usage analytics
  • Open-source code (PostHog/posthog on GitHub)

Side by side

What it is
Core Web Vitals Test:Core Web Vitals Test is a Chrome extension that measures and compares key performance metrics for desktop and mobile pages.
PostHog:PostHog is an all-in-one product analytics platform with session replay, error tracking, feature flags and AI-driven insights.
Best for
Core Web Vitals Test:Instant Core Web Vitals metrics in Chrome
PostHog:Unified product analytics with AI assistance
Who it’s for
Core Web Vitals Test:SEO specialists, web developers, UI/UX designers, digital marketers, product managers, QA engineers
PostHog:Product teams and engineers who need analytics, monitoring and automated issue resolution.
Pricing
Core Web Vitals Test:Free
PostHog:Freemium
Plans
Core Web Vitals Test:—
PostHog:Free $0 · Pay-as-you-go $0 per month · Platform packages $0
Open source
Core Web Vitals Test:—
PostHog:Yes, 40,071 GitHub stars
Works with
Core Web Vitals Test:—
PostHog:Stripe, GitHub, Google Ads, Postgres, HubSpot, Zendesk, Linear, Slack

Core Web Vitals Test features

  • Metric calculation. Shows LCP, CLS, INP, FCP, TTFB for the current page on desktop and mobile.
  • One-click analysis. Calculate metrics by clicking the extension icon without leaving the page.
  • Mobile/desktop toggle. Switch between mobile and desktop results instantly.
  • Competitor comparison. View Core Web Vitals of any competitor page for SEO benchmarking.
  • Real-time monitoring. Track performance changes as you develop or update a site.
  • Multi-language UI. Interface available in 55 languages.

PostHog features

  • Product Analytics. Capture, store and query events with a free tier of 1 M events per month.
  • Session Replay. Record user sessions (5 K free recordings) and surface dead clicks or crashes.
  • Error Tracking. Collect exceptions and stack traces, grouped into actionable issues.
  • Feature Flags & Experiments. Toggle features and run A/B tests with 1 M free flag requests per month.
  • AI Observability. Ask natural-language questions; AI generates diagnostics and pull-request suggestions.
  • Managed Data Warehouse. Store raw events, rows and logs; query via SQL or BI tools.
  • Workflows & Inbox. Automated agents create PRs, prioritize findings and route tickets to GitHub, Zendesk, etc.
  • Integrations. Ingest data from 120+ sources like Stripe, Postgres, HubSpot, Google Ads and more.

Core Web Vitals Test vs PostHog FAQ

Is Core Web Vitals Test or PostHog free?+

Core Web Vitals Test is free. PostHog has a free plan and paid plans.

Is Core Web Vitals Test or PostHog open source?+

PostHog is open source (PostHog/posthog on GitHub). DevHunt has no public source repository on record for Core Web Vitals Test.

On DevHunt

Core Web Vitals Test

1 upvote · Launched on DevHunt on Dec 23, 2025

Core Web Vitals Test on DevHunt →

PostHog

Listed by DevHunt

PostHog on DevHunt →PostHog alternatives

Based on each tool's website and DevHunt data. Details may change; check the official sites.