UptimeRobot
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
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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Freshping
All the essentials for monitoring your website's uptime are at your fingertips. You can track your site for free and receive immediate alerts whenever it experiences downtime. With monitoring capabilities from ten global locations, you can ensure that your website remains accessible from any part of the world. Additionally, you can present your website's uptime history to your clients through complimentary public status pages. Whether it's HTTP/HTTPS, ICMP Ping, TCP, UDP, WebSocket, or DNS, our service is designed to support whatever you are building. You can receive notifications no matter where you are located. Freshping seamlessly integrates with tools like Freshdesk, Slack, Twilio, Skype, and Webhooks, allowing you to get real-time alerts on downtime. You'll also receive weekly performance updates, measuring crucial metrics such as Apdex score, average response time, individual response time, and more. Enhance your website's transparency by featuring its status directly on your homepage. Through Realtime Badges, you can exhibit both your website's uptime history and its current operational status. For those seeking more control, we offer String and Status code checks, ensuring you aren't confined to just one status code. This comprehensive monitoring solution allows for tailored oversight to fit your unique requirements.
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Server Check
The Server Check Monitoring System continuously monitors your websites as well as other internet-based services (Ping. SMTP. IMAP. FTP. You'll be the first to know about any outages.
You don't want to lose more visitors due to downtime. Server Check's 10-monitor free version lets you start monitoring in just five minutes!
Alerts are sent to all admins via email, SMS, and visual alerts when something goes wrong. Server Check will alert you to the problem so you can correct it.
Quick setup of all the most common protocols, including HTTP & HTTPS. You can monitor them all and avoid any outages that could cause customers to lose their business.
View statistics for each monitor, response times graphs, outage duration reports, outage length reports and web-based stats. You can also track down uptime and downtime over 12 months.
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