URIports
Utilize the free built-in capabilities of mail servers and your site visitors' browsers to quickly identify and resolve security, content and connectivity issues with your domain, without having to install additional scripts or software. URIports is an advanced unified tool to monitor web and mail server security and configuration. URIports is the result of our decades of experience in online coding, monitoring, and security. When the system is configured, we receive reports from your site visitors’ browsers and mail servers. We process all these reports and provide you with insights into what's happening. Get clear, real-time insights into the performance of your website. Monitor violations, network errors, certificate issues, deprecated code, and more! Monitor your SPF and DKIM alignment and prevent unauthorized use of your email domain to protect people from spam, fraud, and phishing.
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UptimeRobot
The free online uptime monitoring service with an App is available for iOS and Android.
With the Free Plan, you can monitor up to 50 URLs, check for a website's content (using the keyword monitor), ping your server or monitor your ports in 5-minute intervals. You can create a status page to showcase your uptime. SMS or Call alerts can be bought anytime.
Receive notifications via email, phone calls, SMS, or integrations like Discord, Mattermost, Microsoft Teams, Telegram, Slack, Twitter, Zapier, Pagerduty, Splunk On-Call, Pushbullet, Webhooks, Google Chat, or Pushover.
Upgrade to Pro to get more monitors, 1-minute intervals, unlimited customizable status pages, and share announcements on your status page to which your customers can subscribe and receive them via email.
You can also monitor SSL certificates or errors, cron jobs or devices connected to the internet, and domain name expirations.
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Oh Dear
Oh Dear is an easy way to track the uptime & SSL health for your websites & apps. It's website monitoring without the hassle. Oh Dear is a fully featured app, with an API, webhook support, Slack/HipChat/Pushover/mail alerts & plenty more in the pipeline. Your DNS records are the crucial behind-the-scenes component nobody notices, until it's broken. It is what translates your domain name (what we humans understand) to an IP address (what computers understand). Oh Dear’s uses the full potential of each platform’s integrations so that notifications become smart and actionable: e.g. you can rerun the uptime check without ever leaving Slack. If the primary location reports an error to Oh Dear, the secondary location is used to verify the problem. We'll only trigger an alert if both the primary and the secondary checks report the site as down.
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Pinguzo
Downtime can happen on your servers and websites. Get notified instantly to take corrective steps. More than 800 users are already using Pinguzo to monitor servers and their websites. Join for free and check your server's health and websites uptime, availability, and performance. Monitor your websites uptime, load time, average response times, etc. Install the Pinguzo agent and get detailed server information and graphs. We can send alerts over e-mail, SMS, PagerDuty, Pushbullet, Slack, HipChat, web-hooks, etc. You can set various parameters like if the Load Time is high for X minutes alert me after every Y minutes. View detailed uptime, downtime reports and graphs of your response times. For servers, you can view detailed information of your CPU, RAM, disk, network usage, etc. We verify the downtime from multiple locations. Pinguzo has been tested on CentOS, Debian, Ubuntu, Fedora, Scientific Linux, RHEL, openSUSE, Slackware, Gentoo, Archlinux.
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