SiteMonit is a website change monitoring service. It tracks web pages you select and detects when their content changes, then reports precisely what changed rather than only signaling that an update occurred.

Each detected change is presented as a before-and-after comparison. The previous and current versions are shown side by side, with every added or removed word highlighted. A Text mode annotates the page in the style of tracked changes: removed text is struck through in red and added text is marked in green. A change map called the Diff Axis lists the individual edits so they can be reviewed one by one instead of scanning the full page.

Monitoring runs on a schedule set by the user. Intervals range from monthly to every 15 minutes, and as short as about two minutes on higher-tier plans.

Monitoring can be limited to a specific part of a page, such as a price, a heading, or a status field. Because only the selected area is tracked, rotating banners, advertisements, and other unrelated content do not produce false alerts. Pages that require a login and pages protected by Cloudflare are also supported.

When a change is detected, SiteMonit sends a notification through email, Telegram, Slack, or a webhook.

SiteMonit is applied to a range of monitoring tasks, including tracking competitors' pricing, messaging, and product updates; detecting restocks and price drops in e-commerce; monitoring terms-of-service, policy, and compliance pages; observing SERP and SEO changes; watching for new job postings; and following real-estate and marketplace listings.