Downtime Monkey provides a complete website monitoring service with both Free and Pro plans. Features include:

• Global Monitoring: a network of global servers checks websites from 6 locations worldwide eliminating false positive downtimes

• Response Time Monitoring: monitor the speed of your website and view graphs of response times

• Keyword Monitoring: get notified when the content of your website changes unexpectedly

• Alerts to email, SMS and Slack

• Custom Alert Times: set the time a website should remain down before an alert is sent

• Manage Multiple Sites: bulk upload, edit and delete sites. View the status of all your sites at a glance

• Uptime Stats and Downtime Logs: uptime stats to 3 decimal places (e.g. 99.999%), logs of every individual downtime including the timestamp, duration, response code from the server and a short explanation of the reason for the downtime

• 60 monitors, every 3 minutes completely free

• Pro accounts with all the features from $0.48 per month (or from €0.48, £0.36 or A$0.68 and over 100 other currencies)