Downtime Monkey
UptimeRobot
Pingdom
StatusCake
updown.io
RapidSpike
Pingometer
AlertBot
TaskDisplay
TasksBoard
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)
Manage and visualize your Google shared tasks with a full screen for Google Tasks that is integrated with Google apps.
Downtime Monkey
TaskDisplayDowntime Monkey is especially suited for small to medium-sized businesses, web developers, and anyone managing multiple websites who need reliable uptime monitoring without the complexity and cost of more advanced tools.
UptimeRobot - Free Website Uptime Monitoring
TasksBoard - Manage all your Google Tasks lists in the same board, and move your tasks from one list to another to order them easily.TasksBoard stays synchronized with Google Tasks on Gmail, Calendar, and Google Tasks mobile.
Pingdom - With website monitoring from Pingdom you will be the first to know when your website is down. No installation required. 30-day free trial.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
updown.io - updown.io is a HTTP(S)/TCP/ICMP monitoring service which checks periodically the URL you want and reports back any anomaly.
RapidSpike - RapidSpike is a reliability, performance and security monitoring service for transactional websites. Using next-generation synthetic monitoring & deeper than ever before data, RapidSpike is for businesses serious about protecting their online revenue