I like https://github.com/dgtlmoon/changedetection.io for this. Open source and free to run locally or use their Saas service.

▲

raphman 3 hours ago | parent | next [-]

There's also https://github.com/thp/urlwatch/ - (not aware of any SaaS offer - self-hosted it is).

	▲	vkuprin 3 hours ago \| parent [-]
		Yep, urlwatch is a good one too. This category clearly has a strong self-hosted tradition. With Site Spy, what I’m trying to make much easier is the browser-first flow: pick the exact part of a page visually, then follow changes through diffs, history, RSS, and alerts with very little setup

▲

vkuprin 3 hours ago | parent | prev | next [-]

Yep, changedetection.io is a good project. With Site Spy, I wanted to make the browser-first workflow much easier: install the extension, connect it to the dashboard, click the exact part of the page you care about, and then follow changes as diffs, history, or RSS with very little setup. I can definitely see why the open-source / self-hosted route is appealing too.

	▲	xnx 2 hours ago \| parent [-]
		Changedetection has an extension too: https://chromewebstore.google.com/detail/changedetectionio-w...

▲

beepbooptheory 2 hours ago | parent | prev | next [-]

Sure but this one has a MCP server, costs money, and was presumably made last night!

▲

pelcg 3 hours ago | parent | prev [-]

Looks cool and this can be self hosted and it is for free.

Nice will try this out!