Comparison ContextBolt Radar vs changedetection.io
changedetection.io is the open-source favorite for website change detection, and it is genuinely excellent. Self-host it free with Docker or take the hosted plan at $8.99 a month, point it at any page, and tune XPath and JSON selectors as finely as you like. It is also a general tool that leaves the work to you. You write the rules, read every diff, decide what matters, and if you self-host, you maintain the server. ContextBolt Radar makes the opposite trade. It watches only competitors, judges every change for you, tracks their search footprint, and drafts the response inside your AI agent, for $39 a month with nothing to run. If you love control and infrastructure, changedetection.io wins. If you want competitor intelligence without becoming its maintainer, Radar is built for you.