A website auditwith no person in the loop.
SaaS · billing · PDF reports · 2026
SightStack crawls a site with a real browser, measures it with Lighthouse, sends the screenshots to Claude and assembles a designed PDF report, scored across six dimensions, without anyone touching it on the way.
The chain
Capture
A real browser loads the pages at desktop and phone widths, dismisses cookie banners and waits for content drawn by scripts.
Measure
Lighthouse and the Core Web Vitals, taken from the live page.
Read
Claude reviews the screenshots and the data one dimension at a time, and every answer is checked against a schema.
Report
A designed PDF with annotated screenshots, scored across six dimensions.
When something fails
The AI provider is down
Jobs wait on a backoff of up to about six hours, customer emails pause, and one click retries everything held.
An answer does not fit the schema
It is retried with the exact fields that failed, instead of reaching a report.
A screenshot is too large for the model
It is re-encoded step by step until it fits, instead of failing the audit.
The report
Where it stands
Live at sightstack.app, with a free instant score and paid reports.