Server Check
The Server Check Monitoring System continually monitors your websites and other internet-based services (Ping, SMTP, IMAP, FTP, etc.) and makes sure you're the first to know when there's an outage.
Don't lose any more visitors to downtime. Our FREE 10-monitor version of Server Check lets you get started with monitoring in less than five minutes completely free!
Get alerted as soon as something stops working: visual alerts, audible alarms, emails and SMS texts to as many admins as you need. Server Check makes sure you know about it so you can fix it!
Quick setup of all common protocols, including HTTP & HTTPS, Ping, FTP, SMTP, POP3, IMAP, TCP, MySQL. Monitor them all and stay ahead of any long outages that might lose customers!
View statistics for each monitor, response time graphs, outage length reports, web-based stats and uptime pages, and keep track of uptime and downtime over the last 12 months.
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Host-Tracker
HostTracker is a 24/7 website monitoring service that helps businesses and webmasters track availability, performance and security from over 300 global locations.
With 13 monitor types, you can check HTTP/S, ping, TCP ports, transactions, web content, APIs, page speed, databases, server resources, SSL and domain expiry, plus Web Risk and DNS blacklist status.
Track response times and page load speeds, receive scheduled reports, and get alerts via email, SMS, voice call, Telegram, Slack, Viber, Discord, web push or webhooks. Alert delays, active hours and maintenance windows help prevent unnecessary notifications.
HostTracker also provides public status pages, a REST API and an MCP server for instant checks through AI assistants and developer tools.
The free plan includes 2 monitors. Paid plans start at $10/month, with a 30-day trial including 100 monitors at 1-minute checks - no credit card required.
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Xitoring
Xitoring is an all-in-one monitoring platform for servers, websites, and status pages. One command installs the Xitogent agent (curl on Linux, MSI on Windows), auto-discovering 30+ services: Nginx, Apache, IIS, MySQL, PostgreSQL, MongoDB, Redis, Docker, RabbitMQ, Kafka, and more.
Monitor CPU, memory, disk I/O, network, and processes, plus uptime checks (HTTP(S), Ping, DNS, TCP, UDP, API, Mail, Heartbeat, Cron) at 1-minute intervals from 15+ global probing nodes. SSL monitoring included.
Alerts via 20+ channels: email, SMS, phone call, WhatsApp, Telegram, Slack, Teams, PagerDuty, Opsgenie, webhooks, and more.
Built-in AIOps answers plain-English questions about your metrics and incidents. The Xitoring MCP server lets Claude, Cursor, or any AI agent read metrics, ack alerts, and manage monitors.
Plus white-label status pages, incident management, REST API, and iOS/Android apps.
Free forever: 2 servers + 8 uptime checks. Paid from $4.99/mo, flat pricing, 30-day trial.
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Paessler PRTG
Paessler PRTG is an all-inclusive monitoring software solution developed by Paessler. Equipped with an easy-to-use, intuitive interface with a cutting-edge monitoring engine, PRTG optimizes connections and workloads as well as reduces operational costs by avoiding outages while saving time and controlling service level agreements (SLAs). The solution is packed with specialized monitoring features that include flexible alerting, cluster failover solution, distributed monitoring, in-depth reporting, maps and dashboards, and more.
PRTG monitors your entire IT infrastructure. All important technologies are supported:
• SNMP: ready-to-use and custom options
• WMI and Windows Performance Counters
• SSH: for Linux/Unix and macOS systems
• Traffic analysis using flow protocols or packet sniffing
• HTTP requests
• REST APIs returning XML or JSON
• Ping, SQL, and many more
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