WDT.io!

Monitors your websites every 5 minutes, totally free. Get alerts by e-mail, SMS, Twitter or RSS. Add up to 50 websites. Monitors can be refreshed for an instant check with a click. Supports https and authentication with user/password.

Pingdom web site monitoring and other infrastructure for you and instantly let you know when anything goes wrong. Measure uptime, downtime, and the performance of your website as experienced by visitors.

Monitor Cron jobs and get notified when they fail.

Uptime monitor for server. Currently fully free (beta) so it is subjected to change. Allows to monitor unlimited servers and websites. With custom CNAME you can create live status pages.

PushMon is a new kind of cloud-based monitoring system. Instead of checking public facing servers on a regular basis, PushMon will wait for pings from the objects being monitored. These objects are usually batch jobs, scheduled/cron scripts, backups, or test scripts, but really are anything that has access to the internet and can call a URL on a regular basis. If PushMon does not receive the URL "ping" by the specified schedule (like every hour, or every day or even by 5:00 PM every Fri), it will send an alert (email, IM, SMS, Twitter and/or phone call). We can monitor your database backups, your cron scripts, your background tests, your internet connectivity, your batch jobs, and a lot more. We also have an advanced but easy to use scheduling feature to alert you of problems as soon as possible. »

With webcron you pay per request and you can choose the monitoring frequency to your linking. When your website goes down, webcron can send you either an email or a text message (SMS).

Free & Simple website monitoring

Monitor Scout is a leading website and server monitoring company, with a wide selection of flexible, high quality services. The reliable web-based system monitors your websites and server 24/7 and reduces your downtime with immediate email/SMS alerts. Monitor Scout offers customized packages to monitor websites, hardware and applications, in depth uptime analysis, global monitoring networks and more

Monitor cron jobs, micro services and almost anything else. Realtime alerts when your tasks and services don't run on schedule, run too long or fail unexpectedly. Easier cron troubleshooting and no more silent failures.

Simple monitoring for your SSL Certificates, Cron Scripts and Domains

Monique.io saves 90%+ of the time needed to set up custom dashboards when using traditional systems. Multiple input formats are being parsed automatically by AI and can be visualized on a dashboard by clicking the wanted values.

Netthrob’s servers take their job very seriously. They buzz vigorously from five strategic locations across the world and track the uptime of your website. The coordinated monitoring action from different geo locations gives a very accurate status of your website’s uptime and downtime. Netthrob can precisely point out geography-specific visitor experiences so that you can alter your Content Delivery Network (CDN) resourcing accordingly.

Incredibly easy and comprehensive website monitoring.

ServersUp.net can check a number of different services on different hosts to make sure those services are up and running. It will send alerts when the statuses change.