Yes, both OnPage and PagerTree offer a Free Trial.
OnPage is designed for Large Enterprises, Medium Business and Small Business.
PagerTree is designed for Large Enterprises, Medium Business and Small Business.
Pricing for OnPage Starts at $13.99/User/Month when yearly whereas for PagerTree Starts at $0/user/month when monthly.
Some top alternatives to OnPage includes Freshservice, VictorOps, Amixr, AlertOps, Spike.sh, TaskCall, Mission Manager, Incident.io, StatusCast Incident Management, PagerTree and ResQ.
Some top alternatives to PagerTree includes Freshservice, PagerDuty, Opsgenie, VictorOps, AlertOps, Spike.sh, Mission Manager, Zenduty, StatusCast Incident Management, Kintaba and Pager Team.