Apps similar to Klaxon include Huginn, which is free and open source. Other options are changedetection.io, Distill Web Monitor, HetrixTools and Google Alerts. There's no shortage of Website Monitoring Tools like Klaxon, with more than 50 alternatives for the web, Windows, Mac, Linux and Android.
This service tracks the websites you select on a daily basis and notifies you of any changes, whether it's a new headline or a new product that's been released. Or, use a queryselector to track specific numbers on any page anywhere in the web.
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Create automatic monitors for detecting and scanning changes on web pages, evaluate content based on conditions you define and trigger actions such as notifications, sounds, emails etc.
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SiteDelta is an Add-on for old versions of Mozilla Firefox (before the introduction of WebExtensions).
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Monitor webpages and receive freshly scraped data everytime the page changes to a webhook of your choice.
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Trackly monitors web pages and tells you when they change. Beautifully!.
A Web-to-RSS parser in Common Lisp. This software was written because a disappointing number of websites still does not have an RSS or Atom feed so you could subscribe to their updates. The script tries to find new articles on any website according to given criteria (CSS...
Monitors a number of web pages and tracks changes based on the content of the web pages. Allows to monitor several protocols, including HTTP and HTTPS. Allows to view and record differences.
Screpy is an AI-based web analysis tool that can analyze all pages of your websites in one dashboard and monitor them with your team. It's powered by Lighthouse and it also includes some different analysis tools (SEO, SERP, W3C, Uptime, etc).
