Website Monitoring.
Miss Nothing.
Enterprise-grade website monitoring that goes beyond uptime. Track performance, SSL certificates, DNS records, and visual changes — all from one dashboard.
Set up your first monitor in 60 seconds. No credit card required.
5-Layer Monitoring System
Most tools give you 1-2 monitoring types. We give you all 5, working together.
Uptime
HTTP/HTTPS + TCP/UDP checks from global edge nodes
< 1s responsePerformance
TTFB, FCP, LCP, CLS metrics with trend analysis
Core Web VitalsSSL/TLS
Certificate chain validation, expiry alerts, security grades
29-day warningsDNS
A, AAAA, MX, TXT, NS, SOA record tracking with history
Change detectionVisual
Pixel-by-pixel comparison with SHA256 hashing
Defacement detectVisual Change DetectionBeyond Simple Uptime
Your site can be "up" but completely broken. We capture screenshots, compute pixel-by-pixel differences, and alert you when your UI changes unexpectedly.
Pixel-Perfect Comparison
Detects changes as small as 0.1% using advanced diffing algorithms
Defacement Detection
SHA256 content hashing catches unauthorized changes instantly
Visual History
Browse previous screenshots and compare any two points in time
Sub-Page Monitoring
Track up to 5 key pages per monitor — pricing, about, contact — all checked automatically
Proven in Production
Real incidents caught by Visual Sentinel. Real screenshots. Real results.
