Psilynx: Website Performance Monitoring
Continuous monitoring for Core Web Vitals and technical SEO
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Psilynx: PageSpeed at scale - Monitor performance across thousands of pages

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Running Lighthouse one page at a time does not scale. psilynx lets you audit hundreds or thousands of URLs in bulk, track Core Web Vitals over time, and catch performance regressions after every release. Upload your URLs, run checks for mobile and desktop, and see how performance actually changes across your entire site. No scripts, no manual work.

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Maker
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Hey everyone 👋 We built psilynx after running into the same issue again and again. Lighthouse works great, but only until you have more than a handful of pages. Once you get into hundreds of URLs, everything becomes messy. Results are inconsistent, tracking changes over time is painful, and checking things manually just does not scale. We tried scripts, limited checks to a few pages, even built internal workarounds, but none of it really solved the problem. So we decided to build something simple: A way to run Lighthouse audits in bulk, track Core Web Vitals over time, and actually see what is happening across the whole site. Not just snapshots. Real history. You can upload URLs, run checks for mobile and desktop, and spot regressions after releases without digging through reports. Still early, so any feedback would mean a lot. Curious how you’re currently handling performance monitoring at scale?
Maker

We shipped a pretty big PSI Lynx update this week

The original idea was simple: monitor Lighthouse scores at scale and catch regressions before clients notice them.

But after talking to SEO teams and ecommerce people, we realized scores alone are not enough. People also want context and actual direction.

So we added three things.

  1. AI-powered page recommendations
    Now PSI Lynx doesn’t just show that a page is slow. It explains what’s hurting performance and what is actually worth fixing first.

Not generic “optimize images” advice copied from 2017 blog posts. Real page-level recommendations tied to Lighthouse data and Core Web Vitals.

  1. CrUX history
    You can now see historical Chrome UX Report data directly inside the dashboard.

Which means:
“Lab score looks fine but users still suffer” is no longer a mystery.

Real user metrics over time help spot gradual degradation that synthetic tests often miss.

  1. Uptime monitoring
    This one started as a “small side feature” and immediately became useful.

Now PSI Lynx can monitor uptime, failed responses, and weird page behavior changes in the background. If a page suddenly starts returning errors or something breaks after a release, you get notified before an angry client email arrives at 7:12 AM.

Classic enterprise wellness experience.

We’re still early, still improving the product almost daily, but the platform is becoming much closer to what we originally wanted:

A monitoring system for SEO and performance teams, not just another Lighthouse wrapper.

If you want to try it: