Apps similar to TLS Checker include Uptime Kuma, which is free and open source. Other options are Better Stack, UptimeRobot, Pingdom and Kener. There's no shortage of Uptime Monitor Services like TLS Checker, with more than 25 alternatives for the web, self-hosting, Android, iPhone and Mac.
updown.io is a HTTP monitoring solution with a clean UI and a cheap and simple pricing. It notifies you of downtimes by email or SMS and provides a public status page you can share.
France
EU
StablePing is a fully managed uptime monitoring service for just $3.95/month. Whenever your website goes down, their system will alert you within seconds via email or SMS (and they'll work with you to get it back online).
Get notified by the simplest uptime monitoring service in the world, when your website is down or your certificate becomes invalid. No more, no less.
NetherlandsEU
Notify users when incident happens and show your service uptime to your customers via your public status page & various integration channels StatusEntry provides.
United States
Unlimited monitors checked from multiple location every minute. Monitor any port or setup a "heartbeat" that works well for cron jobs or any service behind a firewall. Be alerted as soon as your service is offline via email or app integration.
Prafero is an all-in-one website intelligence platform for auditing any site in one place. It analyzes SEO, performance, security, DNS, and tech stack signals, then turns them into clear insights so founders, marketers, developers, and agencies can make faster website decisions.
Self-hosted certificate lifecycle management: issue, renew, discover, inventory and deploy TLS certificates across your infrastructure.
Web-powered SSL certificate manager with DNS integration, auto-renewals, and cert tracking. It's like if Certbot and ZeroSSL had a baby. Certbot but more friendly, smarter, and with a dashboard.
A simple status page service you set up in seconds and forget. It stays resilient so your public status page doesn't depend on your main site. Includes real-time incident updates, native HTTP/TCP/Ping monitoring, and custom domains with automatic SSL certificates managed for...
