I'm building OnlineOrNot (https://onlineornot.com https://onlineornot.com) - it's (yet another) uptime monitor, with a twist. Key differentiator being that it

I'm building OnlineOrNot (https://onlineornot.com https://onlineornot.com) - it's (yet another) uptime monitor, with a twist. Key differentiator being that it also does page speed monitoring (actual page speed metrics like first contentful paint and largest contentful paint), and tracks your page's resource size over time. Currently in alpha, with a free tier if you want to check it out.