What are some alternatives?
When comparing SiteUptime and UptimeRobot, you can also consider the following products
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.
Site24x7 - Site24x7 offers both free & paid website monitoring services. Monitor websites remotely and receive instant email/sms alerts if your website becomes unavailable. View uptime & performance graphs of your website monitors.
StatusCake - StatusCake | Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Monitis - Monitis specializes in IT monitoring, covering server, website, app monitoring and more within an all-in-one monitoring platform.
RapidSpike - RapidSpike is an uptime and performance monitoring service for websites and web applications.
Alertra - Website monitoring service with phone call, SMS, XMPP and e-mail alerts. We check websites, servers and routers 24/7, from all around the world. Free trial.