How SiteAlert works

Every day we crawl each page on your site and compare it to the previous version. Anything that's different (a changed title, a new redirect, a missing tag) is logged as a change. See Change types & noise filtering for the full list.

We crawl daily, so you get a fresh comparison every morning. Uptime monitors can check far more often, as frequently as every minute. See Uptime monitoring.

Yes. We render your pages the way a modern browser (and Google) does, so we see your pages as they really appear, including content loaded by JavaScript.

No. We crawl politely and from the outside, the same way a search engine does. Visitors won't notice anything.

By default, yes, we follow the same rules search engines do. For sites you own, you can choose to crawl everything. See Adding a site.

That's fine. Larger sites take a little longer to map out on the first crawl, but everything is covered. You can also exclude sections you don't care about. See Pages & site settings.

From your sitemap. If you don't provide one, we look for it automatically. You can fine-tune the list afterwards.

More than 20 signals per page: title, meta description, headings, canonical, robots directives, hreflang, structured data, links, images, HTTP status, redirects and body text, plus uptime, rankings and tracking. See Change types & noise filtering.

No, and that's the point. Changes pass through four layers of noise filtering, and only the ones that matter become notifications. Everything else stays in the timeline if you ever want to look. See Change types & noise filtering.

The timeline is the full record of everything we detect. The notifications inbox only surfaces the changes worth your attention, so you don't have to watch the timeline all day.

Each change gets a severity from Critical down to Info, based on how much it can affect your SEO. By default the higher severities become notifications. You can tune this per group of pages.

The noise filter is built specifically to cut false alarms, and SiteAlert even learns which parts of your pages flicker on their own. If something slips through, mark it as noise once and we'll leave it alone after that.

Yes. For changes that affect how a page looks, you get a visual before-and-after so you can see exactly what moved.

Yes. With Search Console connected, SiteAlert flags pages losing Google clicks and ties them to changes, and detects cannibalization where two pages compete for the same search.