Sites and apps similar to ChangeTower include Huginn, which is free and open source. Other options are changedetection.io, Distill Web Monitor, Snaplert and WebSite-Watcher. You're spoiled for choice with Website Monitoring Tools like ChangeTower: we list more than 50 alternatives for Windows, Mac, iPhone, Android and Linux.
Web Alert enables you to monitor any website for changes (even when a login, a form post or password prompt is necessary to access the site). You can get notified when a price changes, a new article is published, you receive exam results or an answer in a forum, a registration...
Automated website change detection and monitoring. Perch Intel tracks public websites and summarizes detected changes for you, so you don't have to keep checking manually.
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.
PeerPanda is a web-based tool tailored for Product Managers and Marketers seeking an efficient way to keep tabs on their competitors.
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Visual replacement for the standard ping utility. It helps you monitor TCP/IP targets, by sending echo requests and displaying the responses over a detailed list and a graph. It has all the functions of classical ping, and much more.
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.
