Yes, both PagerDuty and Spike.sh offer a Free Trial.
PagerDuty is designed for Large Enterprises, Medium Business and Small Business.
Spike.sh is designed for Medium Business and Small Business.
Pricing for PagerDuty Starts at $10 whereas for Spike.sh Starts at $6.4/user/month when yearly.
Some top alternatives to PagerDuty includes Freshservice, xMatters, Opsgenie, VictorOps, YetiCloud, AlertOps, Splunk On-Call, Splunk Enterprise, ServiceNow Customer Service Management, Zenduty and StatusCast Incident Management.
Some top alternatives to Spike.sh includes Freshservice, PagerDuty, YetiCloud, Amixr, TaskSift, AlertOps, Mission Manager, FireHydrant, Incident.io, StatusCast Incident Management and ResQ.