I&#x27;m happy with UptimeRobot, but they&#x27;re not a heap less than $10&#x2F;month.<p>If it&#x27;s not really worth $10&#x2F;month to you, do you really care that much? By the time you&#x27;ve &quot;rolled your own&quot; to save $10&#x2F;month, how much time will you have spent and how close to the reliability of a bespoke service can you get for significantly less money? A cron job and a perl script or two on a $3&#x2F;month vps will let you _say_ you&#x27;re monitoring your servers, but if your monitor is less reliable that your web servers it&#x27;s just going to wake you up on weekends and get ignored...