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Calibre

Calibre — Web performance monitoring platform tracking Core Web Vitals, Lighthouse, and budget regressions.

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Our Verdict

Polished performance monitoring for marketing sites and small teams, less rich than SpeedCurve for deep perf work.

Pros

  • Performance budgets with CI integration
  • Real user monitoring plus synthetic tests
  • Clean UI and solid Core Web Vitals tracking
  • Good competitor benchmarking features

Cons

  • Pricing per site adds up for large portfolios
  • Fewer features than SpeedCurve at the high end
  • Limited custom metric configuration
  • No self-hosted option
Best for: Marketing sites and small product teams tracking Core Web Vitals trends Not for: Large multi-site orgs needing custom metrics and deep waterfall analysis

When to Use Calibre

Good fit if you need

  • Tracking Core Web Vitals regressions over time in CI
  • Performance budget monitoring for frontend engineering teams
  • Lighthouse score trending across deployments and releases
  • Alerting on page weight and LCP degradation after deploys
  • Web performance benchmarking against competitor sites

Lock-in Assessment

Low 4/5
Lock-in Score
4/5

Calibre Pricing

Pricing Model
subscription
Free Tier
No
Entry Price
Enterprise Available
No
Transparency Score

Beta — estimates may differ from actual pricing

1,000
1001K10K100K1M

Estimated Monthly Cost

$25

Estimated Annual Cost

$300

Estimates are approximate and may not reflect current pricing. Always check the official pricing page.

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