Monitors GitHub and website releases and notifies via WebHooks and messaging channels.

731 stars27 forksApache-2.0last commit Actively maintained
Pagecrawl is a cloud website crawler that audits and monitors sites for SEO issues, broken links, redirects, and technical errors, producing crawl reports for site health and search visibility analysis.
Monitors GitHub and website releases and notifies via WebHooks and messaging channels.

731 stars27 forksApache-2.0last commit Actively maintained
A self-hosted service that monitors changes on web pages and notifies you via email or messaging apps using YAML configurations.

714 stars60 forksMITlast commit Actively maintained
Webcap is a self-hosted tool to capture, screenshot, and archive web pages for later reference, sharing, and documentation.

Activity unknown
Every option on this page is open source and free to run on your own hardware, so you own the data and there is no subscription to cancel. 2 of 3 shipped a commit in the last six months. Licences in this list: Apache-2.0, MIT. In exchange you take on hosting, backups and updates yourself.
Browse everything in Monitoring & Observability.