Hyperping - Cheap uptime and performance monitoring with detailed reporting and flexible alerting
UptimeRobot App - Web, SSL, ports & Cron-jobs monitoring
Downtime Bot for Telegram - Get alerts when your site gives errors via a Telegram Bot 🤖
Cronitor - Monitor cron jobs, micro-services, daemons and almost anything else, no setup required. Easier cron troubleshooting and no more silent failures.
TaskCall - TaskCall is an incident response and management service that helps organizations digitize their operations and reduce downtime costs to the minimum by mobilizing their response effort and streamlining stakeholder communication.
Curler - Dead Simple Free Uptime Monitoring