

TLS Checker is described as 'Free TLS / SSL Expiry Monitoring Service which includes Discovery, Inventory and Management of certificates. For Free' and is a website monitoring tool in the network & admin category. There are more than 25 alternatives to TLS Checker for a variety of platforms, including Web-based, SaaS, Android, Self-Hosted and iPhone apps. The best TLS Checker alternative is Uptime Kuma, which is both free and Open Source. Other great apps like TLS Checker are Better Stack Uptime, UptimeRobot, Pingdom and Kener.


Guardius is a Software as a Service (SaaS) company designed to streamline and automate various IT needs for companies that operate their own websites or manage their own infrastructure. It is crucial for companies to safeguard their websites and infrastructure against potential...




Monika is a command-line application to monitor every part of your web app using a simple YAML configuration file. Get alert notifications through SMTP, Discord, Slack, WhatsApp, and many more when your site is down but also when it's slow!.


We alert you, before your customers do.
OnlineOrNot monitors your websites, web apps, and APIs, letting you know instantly if anything goes wrong.



Phare is the all-in-one platform that covers everything you need to run high-quality production websites with uptime monitoring, analytics, security, incident management, and alerting.




Statsignal is the simplest and most cost-effective way to monitor your website or server and publish a status page of your system. No plans, pay as you go. Free monitors available.




Uptime Monitor monitors your resources using HTTP/HTTPS (highly customizable), TCP, or Ping protocols. It supports multiple notification channels such as SMS, email, Slack, and Discord. In addition, Uptime Monitor can host status pages on your own domain for free.


Free SaaS service for Uptime Monitoring for web sites, hosting servers and ports & custom Status Pages.

UpTimeLine checks that your websites are online and notifies you in case of downtime. Get up to 20 monitors checked every 5 minutes for free. All HTTP methods, custom body and headers, regex check on response body, SSL certificate monitoring and more.

Status.io is a platform for system status pages and status notifications. Companies rely on Status.io to track outages, schedule planned maintenances, broadcast status notifications, and much more; and their customers love the transparency.




A simple self-hosted status page site with an API written in Django under the BSD license.