UptimeAlien is infrastructure monitoring software that tracks website and service availability through health checks and instant alerts. It monitors websites, APIs, ports, DNS records, SSL certificates, and scheduled jobs at intervals as short as 60 seconds. Supported checks include HTTP/HTTPS, API workflows, JSON evaluations, keyword searches, and ICMP ping tests, measuring response times and detecting outages. The platform tracks SSL certificate expirations, sending alerts 1–90 days in advance, and warns of domain registration lapses via RDAP queries. Port monitoring checks TCP/UDP services like databases and SSH, while DNS monitoring resolves A-records and reports issues. Error tracking captures exceptions, groups similar errors, and allows filtering by service or environment. Notifications are sent via 12 channels, including Slack, email, and PagerDuty. Public status pages show uptime history, and premium plans offer branding customization and team access with individual logins.