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Calibre

Web Performance Monitoring for Every Team

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Calibre is a web performance monitoring platform that combines real user monitoring (RUM), Google Chrome User Experience (CrUX) data, and synthetic page speed tests in a single platform. It helps teams track Core Web Vitals, identify slow pages and elements, and improve site speed.

Key capabilities include RUM with element attribution for LCP, CLS, and INP, CrUX monitoring, synthetic testing, third-party impact analysis, and page leaderboards. Integrations include GitHub, Slack, Zapier, Netlify, Render, webhooks, a Node.js API, and a command line interface.

Calibre is packaged with a 15-day free trial and multiple plans (Starter, Team, Company) with seat-based and usage-based limits on sessions, tests, and seats. SSO via SAML and Google is available on Team and Company plans, with an audit log on the Company plan.

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