Yes, both Apex Ping and PagerTree offer a Free Trial.
Apex Ping is designed for Medium Business and Small Business.
PagerTree is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Apex Ping Starts at $10/Month whereas for PagerTree Starts at $10/User/Month.
Some top alternatives to Apex Ping includes Freshping, Uptime, Uptime Robot, Hyperping, UpTime.onl, SolarWinds Pingdom, pingnow.io, Epic Ping, WebForce Uptime and Pingt.io.
Some top alternatives to PagerTree includes Freshservice, PagerDuty, Opsgenie, VictorOps, AlertOps, Spike.sh, Mission Manager, Zenduty, StatusCast Incident Management, Kintaba and Pager Team.