Website monitoring, actually smart
WatchDiff watches the web so you don't have to. We combine pixel-perfect visual diffing with AI-powered change classification to give you meaningful alerts — not noise.
What we do
WatchDiff monitors any public URL on a schedule you control — from once a day to every minute. Every time we check a page, we capture a screenshot and extract its text. We then compare that snapshot to the previous one and compute exactly what changed: which words were added or removed, which pixels shifted, and how significant the difference is.
When something meaningful changes, we alert you instantly via email or webhook. You can also configure an AI prompt to act as a content filter — so you only hear about the changes that matter to your specific use case.
Who uses WatchDiff
Digital Marketers
Track competitor landing pages, CTAs, and messaging in real time.
SEO Professionals
Monitor SERP snippets, structured data, and competitor content changes.
Researchers & Analysts
Audit data sources and detect shifts in published information.
Compliance Teams
Verify that content stays within regulatory boundaries over time.
What makes us different
Visual Diff
Pixel-level screenshot comparison catches layout shifts, design changes, and visual regressions that text monitoring misses entirely.
AI Classification
Not every change matters. Our AI filters noise and surfaces only the changes that are actually relevant — based on context you define.
Smart URL Analysis
Targets the exact content you care about using CSS selectors, focus areas, and blocked selectors — so dynamic ads never pollute your results.