Apps similar to changedetection.io include Huginn, which is free and open source. Other options are Distill Web Monitor, WebSite-Watcher, Visualping and Wachete. There's no shortage of Website Monitoring Tools like changedetection.io, with more than 50 alternatives for the web, iPhone, Android, Mac and iPad.
Most website monitoring tools track entire pages, creating noise from ads, layout shifts, and irrelevant updates. PageWatch works differently. Select the exact part you care about — a price, stock label, or content section — and get notified only when that area changes.
FetchTheChange monitors websites and alerts you the moment something changes — a price, a stock status, a competitor's pricing page, a government notice, or any other value you care about.
Norway
Monitor any web page and get a history of what changed, item by item: which product, plan or notice changed, in which field, with the old and new value.
Brazil
RSS feeds for arbitrary websites, using CSS selectors. Feed me up, Scotty! is: straightforward to set up, runs on GitHub Actions, GitLab CI/CD, or wherever floats your boat, uses an actual browser to fetch data.
DealHunter is a marketplace deal-alert aggregator that watches 7 resale marketplaces — Mercari, eBay, Facebook Marketplace, Poshmark, Craigslist, OfferUp, and Depop — from a single saved search.
United States
LurkMor monitors Craigslist, eBay, and Poshmark for new listings that match your search terms and sends you an alert the moment something shows up. Set up a search once, pick your notification method (email or Telegram), and let it run. No account required to get started.
SiteMonit is a cloud tool that watches web pages and shows a before/after diff of exactly what changed, with alerts by email, Telegram, Slack, webhook or Viber.
Monitor your competitors' clinical trial pipelines on ClinicalTrials.gov, with daily alerts when trials change status, shift phase, or show signs of slipping.
StayWindow is a service that monitors hotel prices for your desired bookings. You can add hotels from Booking.com or a hotel's own page, set your dates, and StayWindow will check them daily. If a better price appears, you'll receive an email alert.
Bulgaria
EU
MCP-native website monitoring that tracks changes on any public URL and delivers AI-powered summaries through ChatGPT, Claude, or the web dashboard.
SwedenEU
PageDiff watches any public web page and tells you what changed — and whether it matters. Describe what to watch in plain English; get AI-written, significance-scored alerts.
RomaniaEU
