The ultimate uptime monitoring service. Get 50 monitors with 5-minute checks completely free. Set up in seconds and stay informed about your website’s health at all times.
Website monitoring: Get instant alerts when your website goes down. Reliable and accurate monitoring helps you fix issues before they affect users and prevent revenue loss.
SSL certificate monitoring: Avoid losing visitors due to expired SSL certificates. Get notified 30 days before expiration so you can renew in time.
Ping and port monitoring: Check if your server is online or if your email service is running on port 465. Monitor any port you need with real-time alerts.
Cron job monitoring: Track scheduled tasks with heartbeat monitoring. We verify if the request arrives on time, making sure server-side jobs and internet-connected devices are running properly.
Status pages: Create up to 100 branded status pages, protect them with a password, and allow subscribers to receive updates.
Stay informed with email, SMS, voice calls, push notifications, or integrations with Slack, Zapier, PagerDuty, Telegram, Discord, Microsoft Teams, Google Chat, and more.
Maintenance windows: Pause monitoring when you schedule downtime to avoid unnecessary alerts
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Uptime.com website monitoring solutions provide unmatched visibility and availability, empowering engineering, operations and SRE teams to monitor & respond to their most essential services. Simple & intuitive industry leading Enterprise-grade features delivered at a fair price, that are continuously improving.
G2, Sourceforge and TechRadar Pro have recognized us as one of the world’s best uptime monitors for several consecutive years, including this one. Try 100% free.
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ZnowPulse
Bring endpoint checks and incident communication into one hosted workspace. ZnowPulse monitors websites, APIs and servers using HTTP/S, TCP, ping, DNS, keyword and certificate checks. Its Nexus Points summarize related monitors so teams can follow the health of a service. The dashboard also supports incident handling, scheduled maintenance and configurable alert destinations. Start free with unlimited monitors checked every five minutes, a 30-day history, one user and one Nexus Point. An annual Pro subscription costs US$59.99 and enables intervals down to ten seconds, team access, public status pages, more Nexus Points, report exports and S3-compatible backups. Explore a prepared sample workspace at the product website. Monitoring intervals describe plan capabilities; they do not guarantee detection times or uptime. ZnowPulse is operated by ZnowSoft.
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Host-Tracker
Host Tracker is a website and server monitoring service that checks the availability and performance of web resources around the clock from a global network of monitoring agents. Regular checks help detect and resolve problems such as downtime, slow page loads, broken links, and server errors before they affect users.
Availability checks use protocols including HTTP(S), ICMP (ping), SMTP, SNMP, and TCP. Content monitoring confirms that specific page elements are present and working correctly. Transaction monitoring reproduces multi-step scenarios such as form submissions and site navigation to catch functional failures. Blacklist monitoring warns when a domain or IP appears on DNS-based blacklists that can hurt email deliverability and search rankings.
When an issue is detected, Host Tracker notifies the responsible people through multiple channels: email, SMS, voice call, Telegram, Viber, Slack, and web push. The service also compiles uptime statistics and performance reports in PDF, CSV, and XML formats.
Additional tools include domain and SSL certificate expiration monitoring, page speed analysis, database performance checks, and server resource monitoring (CPU, RAM, disk load), giving a complete view of a site's health and performance.
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