Free Website Monitoring Service
This is a free service that check your website every 30 minutes and send you an email if the website is down.
Free monitoring account includes one monitoring service (any port or service) checked every 30 minutes. Free account has all necessary features to keep the track of your website uptime and is limited in some advanced features and check frequency only. There is no limitations on worldwide locations so your service will be monitored from all over the world. All Premium detailed reports are also available for free monitoring accounts. No additional charges for using SMS notifications. Account lifetime statistics never deleted and available for the whole period of monitoring.
You can also get a paid service that checks your website every minute or whatever interval you decide. You can find more details in the link above.
