Website graders promise a quick health check, but they vary wildly in what they actually measure. Some focus on technical SEO. Others check performance. A few evaluate conversion potential. Most just run Lighthouse under the hood and dress up the output.
We tested seven graders by running the same mid-tier SaaS landing page through each. The results were revealing: scores ranged from 42 to 89 for the exact same page, because each tool weights different things. That's not a flaw — it's a feature, once you understand what each tool prioritizes.
The right grader depends on what you're trying to fix. Need to improve page speed? Different tool than if you need to improve conversions. Here's an honest breakdown.