Yes, both SolarWinds Pingdom and WatchSumo offer a Free Trial.
SolarWinds Pingdom is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
WatchSumo is designed for Medium Business and Small Business.
Pricing for SolarWinds Pingdom Starts at $10/Month when Billed Yearly whereas for WatchSumo Starts at $7/Month.
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 WatchSumo includes Uptime, Super Monitoring, UpTime.onl, Netumo, Uptrends, pingnow.io, WebForce Uptime, Pingt.io and Statsignal.