About GuardianScan
Built by a developer who got tired of doing the same manual checks on every project.

Michael Pilgram
Founder & Developer
I'm the founder of Numen Technology Ltd, a UK-based web development agency. Over the past 15 years, I've built hundreds of websites across different teams, companies, and industries.
You can read more about my work and thinking on my personal site: michaelpilgram.co.uk
Why I Built GuardianScan
After auditing 500+ websites for clients, I noticed I was doing the same checks over and over. Is the Lighthouse score acceptable? Did someone forget security headers? Is the schema markup valid? Are we meeting WCAG 2.2 standards?
Every project meant opening a dozen different tools, running manual tests, cross-referencing documentation. It was tedious, time-consuming, and easy to miss something.
So I built GuardianScan to automate the process. It runs the same 47-point check I'd do manually, but finishes in under a minute.
What makes it different from existing tools is the focus on modern web standards. It checks for Core Web Vitals, modern framework patterns, proper caching strategies - not just the basic SEO checklist from 2015.
It scans live websites via HTTP, so it won't catch everything - automated accessibility checks get about 70% of issues, and it can't analyse source code or private repos. But it catches most common problems fast.
I use it on every project now. Scan before launch, after deploys, whenever something feels off. It catches the things that slip through code review.
If you build websites professionally, this will save you time and help you ship better work.
About Numen Technology
GuardianScan is built and maintained by Numen Technology Ltd, a UK-registered web development agency.
Numen Technology Limited
Company No. 13262519
Registered in England and Wales