Yes, both SolarWinds Pingdom and Zenduty offer a Free Trial.
SolarWinds Pingdom is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Zenduty is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for SolarWinds Pingdom Starts at $10/Month when Billed Yearly whereas for Zenduty Starts at $5/User/Month when Billed Yearly.
Some top alternatives to SolarWinds Pingdom includes Freshping, Uptime, Pingmeter, SolarWinds ipMonitor, Visualping, pingnow.io, Epic Ping, PingPing, Pingt.io and PingSphere.
Some top alternatives to Zenduty includes Freshservice, PagerDuty, Opsgenie, VictorOps, AlertOps, Spike.sh, Rootly, Incident.io, StatusCast Incident Management, PagerTree and ResQ.