UptimeTea

UptimeTea is a monitoring service that helps business owners be ahead of their online projects downtime. With 1-minute check intervals this tool will send e-mail, SMS, call, or Slack message when something unexpected happens. Rich reporting makes it easy to investigate the overall reliability of the servers and tools you use. Check websites, servers, HTTPS certificates, domains expiration, cronjobs, ports, backups, emails connections (smtp, imap, pop3), pings and more! The best part - UptimeTea is totally free to start!