well its 2025, the best one out there is now https://changedetection.io/ now exist, which are also available as opensource if you want to run it yourself.

it supports email, Discord, rock-chat, NTFY, and about 90 other integrations.

It's so customisable that theres not much you cant do with it! Also check out the scheduler, conditional checks, and heaps more features, whats cool is that its python based opensource.