The pickLink checked Oct 9
UptimeRobot
uptimerobot.comEmails you when your site goes down; 50 free monitors
Free tierSignup required
Why it's the pick
UptimeRobot checks your site every five minutes from outside and emails you as soon as it stops responding, with 50 free monitors plus SSL and domain-expiry warnings. You need an account, and the free plan is pitched at hobby and non-profit sites.
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