We have onboarded around 50 employees so far. Experience is really good, no glitches.
Just charging $1 per month per person
Grafana - Data visualization & Monitoring with support for Graphite, InfluxDB, Prometheus, Elasticsearch and many more databases
Time Doctor - Time Tracking and Time Management Software that is accurate and helps you to get a lot more done each day.
Prometheus - An open-source systems monitoring and alerting toolkit.
Screenshot Monitor - Best tool for remote, office and freelance time tracking to boost your team performance.
Zabbix - Track, record, alert and visualize performance and availability of IT resources
ScreenMeter - Employee time-tracking software with automatic screenshots. $1 per user per month. Free trial.