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Free Speed & Stack Auditor

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Enter any website URL to audit which live chat widget is running, measure its JavaScript bundle weight, calculate its Core Web Vitals latency penalty, and uncover annual spend leakage.

Try an example: intercom.com • tidio.com • crisp.chat

The Hidden SEO & Core Web Vitals Cost of Heavy Chat Widgets

Total Blocking Time (TBT)

Widgets like Intercom and Zendesk monopolize the browser's main thread for 180–300 ms, freezing interactions when visitors click CTA buttons.

Largest Contentful Paint (LCP)

20+ subrequests fight for browser network bandwidth, delaying the render of hero images and web fonts by up to 1.2 seconds.

ZestChat Edge Micro-Bundle

At 11.8 kB gzipped with 2 async requests, ZestChat recovers up to 18 points on Google PageSpeed with zero SEO penalty.