Get instant notifications when your website goes down. Track uptime, response times, SSL certificates, and performance metrics in real-time. Keep your business online and your users happy.
Start monitoring in three simple steps
Enter your website URL and choose monitoring type (HTTP, HTTPS, Ping, Port). Set check interval from 1 to 60 minutes.
Choose how you want to be notified: Email, SMS, Slack, or Webhook. Set up multiple notification channels for critical sites.
We'll monitor your site 24/7 and alert you instantly if something goes wrong. View detailed reports in your dashboard.
Everything you need to keep your websites online and performing well
Monitor HTTP, HTTPS, TCP ports, ping, and DNS. Check status codes, response times, and content verification.
Get alerted via Email, SMS, Slack, Discord, Telegram, or Webhook. Receive alerts when sites go down and when they recover.
Track response times, uptime percentage, and performance trends. Identify slow pages and optimize your infrastructure.
Monitor SSL certificate expiration dates. Get notified before certificates expire to avoid security warnings.
Track all downtime incidents with detailed logs. View incident duration, affected monitors, and root cause analysis.
Create beautiful public status pages for your users. Keep them informed about system status and scheduled maintenance.
Choose the right monitoring type for your infrastructure
Monitor website availability, status codes, response times, and page content
Check if specific ports are open and accepting connections (FTP, SSH, SMTP, etc.)
Monitor server availability and network latency with ICMP ping checks
Verify DNS records and resolution times to ensure proper domain configuration
Get notified within 30 seconds when your site goes down. Our distributed monitoring network ensures rapid detection from multiple locations worldwide.
Our monitoring infrastructure is built for reliability. We monitor the monitors, ensuring our service is always available when you need it.
Triple-check system validates downtime from multiple locations before alerting you, eliminating false alarms and notification fatigue.
Integrate with Slack, PagerDuty, Discord, Telegram, and more. Use webhooks to connect with any custom system or workflow.
Whether you're a developer, agency, or enterprise, we've got you covered
Monitor your MVP and ensure uptime for early adopters. Start free and scale as you grow.
Monitor all your client websites from one dashboard. Provide uptime reports and SLA compliance.
Monitor critical infrastructure with custom SLAs, team collaboration, and priority support.
Every minute of downtime costs sales. Get instant alerts to minimize revenue loss.
See what our customers say about us
"SiteIsOnline has been a game-changer for our business. We get instant alerts and can fix issues before our customers even notice."
"The best monitoring service I've used. Simple setup, reliable alerts, and excellent support. Highly recommended!"
"We monitor 50+ client websites. The reporting features and status pages are exactly what we needed for transparency."
Join thousands of users who trust SiteIsOnline to keep their websites running smoothly. Start free, no credit card required.