Website Change Detection with AI Summaries
Paste a URL and Site Monitor checks it on your schedule. When the content changes, you get an email alert, and your dashboard explains what was added, removed, or reworded — not just 'something changed'.
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Free plan · 10 URLs · hourly checks · 2 AI summaries/mo · no credit card
Updated
- Pro plan price changed from $49/mo to $59/mo
- New 'Annual billing — save 20%' toggle added
How it works
Paste any public URL
Your own pages, a competitor's pricing page, a policy, a careers page — anything a browser can open without logging in.
Optionally target an element
Add a CSS selector to watch just one part of the page, so ads, timestamps, and counters are ignored.
Get a useful alert
Site Monitor fingerprints the content on every check. When it changes, you get an email alert, and an AI summary of the change appears in your dashboard.
You choose which alerts each URL sends — downtime, content changes, slow responses — and we email you when they happen.
What you can detect
- Text added, removed, or reworded anywhere on a page
- Changes inside one element (price table, list, banner)
- Pages that disappear or start returning errors
- Content rendered by JavaScript
- Changes to raw files, JSON, or plain-text URLs
How website change detection works
On every check Site Monitor fetches the page, optionally renders its JavaScript, extracts the content (or just the element you selected), and computes a fingerprint. If the fingerprint differs from the previous check, the page changed.
Instead of showing you a raw diff, Site Monitor asks an AI model to describe significant changes in plain English. The summary appears in the site's dashboard, and your email alert links straight there. Very small edits still trigger an alert but may not get a summary.
Avoiding false alerts
Most noise comes from parts of the page you don't care about: rotating testimonials, 'last updated' timestamps, view counters, ad slots. Scoping the watch with a CSS selector removes nearly all of it.
Site Monitor also uses state-change semantics: you get one alert per change, not a repeat alert on every check.
Frequently asked questions
Will rotating ads, timestamps, or counters cause false alerts?
Not if you scope the watch. Add a CSS selector (for example #pricing or .event-list) and Site Monitor fingerprints only that element — everything else on the page is ignored. Whitespace-only changes never trigger an alert.
What is an AI change summary?
When a page changes significantly, Site Monitor uses AI to describe in plain English what was added, removed, or reworded. Summaries appear in the site's dashboard — your email alert links straight there. The Free plan includes 2 AI summaries a month; paid plans include more.
Does it work on pages that load content with JavaScript?
Yes. Site Monitor can render the page in a headless browser before fingerprinting it, so content injected by JavaScript is included in the comparison.
How often does Site Monitor check a page?
Free checks every hour. Paid plans check as often as every 5 minutes, and you can set the interval per URL.
Is Site Monitor free?
Yes. The Free plan covers 10 URLs checked every hour, with 2 AI change summaries a month — no credit card required. Upgrade only if you need faster checks, more URLs, or more AI summaries.
Can it watch pages behind a login?
No. Site Monitor fetches public URLs the same way a browser would. Pages that require a login, CAPTCHA, or paywall can't be read.
Start watching your first page
Start watching free → Explore the live demo
Free plan · 10 URLs · hourly checks · 2 AI summaries/mo · no credit card