There are loads of free site monitoring services on the web today, and we have actually found one that we like so far. The Uptime Robot remote Web Property is designed to help detect and notify you if your site property goes down. A down Web Property can mean lost revenue and profits for you and/or your business. Some visitors to your site will see the "down" site and become discouraged from ever returning again. Need Web Property Monitoring? Visit here.
Information taken from the Uptime Robot Frequently Asked Questions page. You can visit them directly here.
Why is Uptime Robot free? That's a good question. Uptime Robot is launched on January 2010 and it is totally free since then.
It all started with the desire to create something free + useful for the web community. Within time, the service grew so much, we spent lots of hours improving it and learned a lot.
We don't know if it will always be free or not (no plans for that) as the cost of maintaining the servers and improving the code gets bigger each day. However, if it ever becomes premium, we will try our best to keep what is already free as free. Where are the monitoring locations and what are their IPs? The main monitoring location is in Dallas-USA and there are other nodes in other countries/continents to verify down statuses.
Here are all the locations and IPs used:
184.108.40.206 (Dallas - USA) 220.127.116.11 (Dallas - USA) 18.104.22.168 (Dallas - USA) 22.214.171.124 (Dublin - Ireland) 126.96.36.199 (Singapore) Are my website stats affected? For HTTP monitors, no, as they use HTTP HEAD requests and the tracking codes the analytics services won't be downloaded. For keyword monitors, yes, as. Almost all analytics services and tools have the feature of excluding IPs and we suggest that you exclude the IPs used to guarantee that the stats won't be affected (here is the "how-to" for Google Analytics). What are the differences between monitor types? Here are short details about monitor types: HTTP(s): that's perfect for website monitoring. The service regularly sends requests (which are the same as if a visitor is browsing your website) to the URL and decides if it is up or down depending on the HTTP statuses returned from the website (200-success, 404-not found, etc.) Ping: this is good for monitoring a server. Ping (ICMP) requests are sent and up/down status is decided according to the "if responses are received or not". Ping is not a good fit for monitoring websites as a website (its IP) can respond to ping requests while it is down (which means that the site is down but the server hosting the site is up).
Keyword: checks if a keyword exists or not exists in a web page
Port: good for monitoring services like smtp, dns, pop as all these services run from a specific port and Uptime Robot decides their statuses if they respond to the requests or not.
The free SMS feature is not working for me. Uptime Robot currently uses the free email-to-SMS gateways for the providers that are told to support it. It is almost impossible to debug any issues regarding the deliveries as Uptime Robot simply sends an e-mail with a specific format and that is all, no responses returned. However, we'll soon be adding a pro-SMS-gateway option which shall work for everyone.
I didn't receive any up/down notifications. Please make sure that there are alert contacts attached to the monitor. This can be done/checked through the "edit monitor" dialog.
If this happens even though there are alert contacts for the monitor, please let us know and we'll be happy to dig deeper.