Know the moment your website goes down.
SiteSentry watches your websites, APIs, and SSL certificates around the clock and alerts you the second something breaks — before your customers notice.
Free forever for up to 5 websites. No credit card required.
Everything you need to stay ahead of downtime
Uptime Monitoring
HTTP/HTTPS checks as often as every 5 minutes, with response time and error tracking on every ping.
SSL Certificate Monitoring
Get warned 30, 15, 7, and 1 day before a certificate expires — never let HTTPS lapse again.
Instant Alerts
Email and in-browser notifications the moment a site goes down, and again when it recovers.
Public Status Pages
Share a branded status page with uptime history, incidents, and planned maintenance windows.
Uptime Reports
Daily, weekly, and monthly uptime and response-time reports for every site you monitor.
Built for Teams & Agencies
Tag and organize dozens or hundreds of client sites, all from a single dashboard.