I originally built OnlineOrNot (https://onlineornot.com) to have a convenient way to convince my contracting clients that their hosting sucks.
They'd be like "Oh but I pay $5/mo for this wordpress host, it's fine?" and I'd send them a report saying their website was offline for say 10 hours that week, and to calculate how much being offline for 10 hours would cost them.
Eventually a client asked to be setup with their own account, so I took the time to go full-SaaS.
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