SiteAlert is described as 'Don't let your site visitors discover your WordPress site's issues before you do. SiteAlert monitors your site's performance, availability, broken links, broken images, blacklists, and more' and is an app in the Network & Admin category. There are more than 10 alternatives to SiteAlert for a variety of platforms, including Online / Web-based, SaaS, Android, iPhone and Mac. The best alternative is Pingdom. It's not free, so if you're looking for a free alternative, you could try Freshping or HetrixTools. Other great apps like SiteAlert are Up Ninja (Paid), Site monitoring (Free, Open Source), Silent Down (Paid) and Lean20 Ping (Paid).
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 uptime,response timeandapdex indexes of your website or api for free and receive instant updates through e-mail or Slack with real time announcements. Don't leave your customers in the dark during downtime & outages of your website.
Free open-source website monitoring software, easy to set up and use for monitoring web sites. You can monitor single web pages, multiple web pages, pages in sitemap and even your whole web site using spider. You can check HTTP result codes and even contents of the checked pages.
Unlimited monitors checked from multiple location every minute. Monitor any port or setup a "heartbeat" that works well for cron jobs or any service behind a firewall. Be alerted as soon as your service is offline via email or app integration.
Monitor your website, server, API, application, service and get notified if your resources have some problems with availability. Upzilla notifies you in Slack, Telegram, Messenger, or by email. Works also as a public status page with subscriptions.