StatusOk (Open source) alternatives

WebGazer is a monitoring and analytics platform that offers uptime monitoring, cron job monitoring, and public status page services. WebGazer tracks the uptime and availability of websites, APIs, and cron jobs, by checking the monitored target's status by connecting periodically, and alerting users in real-time through various channels like e-mail, Slack, PagerDuty and more, when downtime or performance issues are detected.

Troops.ai provides salesforce automation platform that gives real-time transparency around salesforce information. It serves as a Slackbot for sales team.

Ping is a beautiful Linux monitor app, it supports linux-based systems too. It allows you track your Linux servers' status easily. You only need to add your Linux servers to Ping using SSH account and Ping will show metrics. No dependency required, no deamon required.

Website peace of mind. Haark keeps track of all of your websites and makes sure you’re the first to know if they’re down. Developers and project teams alike use Haark as their early warning system so they can be on their A-game with clients.