ClickShield's full privacy policy is published at https://policy.clickshield-support.workers.dev

In short: ClickShield reads the URL of a link you hover or click, and nothing else on the page, and sends that URL (plus a random, non-identifying install ID used only for rate-limiting) to ClickShield's own backend proxy, which checks it against Google Safe Browsing, URLhaus, and PhishTank, and returns a safety verdict. No browsing history, page content, account details, or personal information is ever collected. There is no advertising, no analytics, and nothing is sold to anyone. See the full policy at the URL above for the complete breakdown of what's sent, what's stored locally, retention periods, and contact details.