SectionSignal - Website Change Monitor

Monitor page sections, competitor pricing and website changes from your browser. Local-first alerts and clean diffs.

SectionSignal helps founders, marketers, researchers and operators track important website changes without setting up a cloud monitoring account. Select a page section, save it as a monitor, and SectionSignal will check it from your browser while Chrome is open. When meaningful text changes, SectionSignal keeps a local history and shows a clean before/after summary. Use SectionSignal for competitor pricing pages, product and changelog pages, headline and landing-page changes, job pages, funding/news pages, and any page section you can access in your browser. Core features: - click-to-select page sections - local snapshots and diff history - desktop notifications - pause, resume and delete monitors - no account, no tracking, no remote code - all monitor data stays in browser storage Important: SectionSignal v1 checks pages locally while Chrome is open and the watched page is accessible. It is not a cloud uptime monitor and does not check pages when the browser is closed.