The only RUM platform built specifically for 3rd-party script performance attribution
Every modern website relies on dozens of 3rd-party scripts - analytics tools, chat widgets, ad platforms, A/B testing frameworks. While these tools provide valuable functionality, they can also significantly impact your website's performance.
The Problem: Traditional monitoring tools show you that your site is slow, but they don't tell you which 3rd-party script is causing the problem. You're left guessing whether it's Google Analytics, Facebook Pixel, your chat widget, or something else entirely.
Our Solution: ScriptVitals automatically detects, identifies, and measures the performance impact of every 3rd-party script on your website. We give you the data you need to make informed decisions about which scripts to keep, optimize, or remove.
We automatically identify Google Analytics, Facebook Pixel, chat widgets, and hundreds of other 3rd-party scripts. No manual configuration required.
See exactly how much each script adds to your LCP, FCP, CLS, and Total Blocking Time. Make data-driven decisions about your 3rd-party stack.
Get intelligent recommendations on which scripts to defer, lazy-load, or remove based on their ROI and performance impact.
Real User Monitoring (RUM) captures actual user experiences across devices, browsers, and locations. No synthetic testing - just real data.
ScriptVitals was born from a simple frustration: we kept seeing websites with great Core Web Vitals in Lighthouse, but terrible real-world performance. After digging deeper, we discovered the culprit was always 3rd-party scripts.
Tools like Google Analytics, Facebook Pixel, Intercom, and Hotjar are essential for modern websites, but they can add seconds to your load time. The problem? There was no easy way to measure their individual impact.
We built ScriptVitals to solve this exact problem. Now, thousands of developers use our platform to understand, optimize, and take control of their 3rd-party script performance.
ClickHouse for analytics, PostgreSQL for metadata
Deployed on Cloudflare Workers worldwide
GDPR & CCPA compliant, end-to-end encryption
Start your free 7-day trial today. No credit card required.