Yes, both WatchSumo and Uptrends offer a Free Trial.
WatchSumo is designed for Medium Business and Small Business.
Uptrends is designed for Large Enterprises, Medium Business and Small Business.
Pricing for WatchSumo Starts at $7/Month whereas for Uptrends Starts at $15.47/Month when Billed Yearly.
Some top alternatives to WatchSumo includes Uptime, Super Monitoring, UpTime.onl, Netumo, Uptrends, pingnow.io, WebForce Uptime, Pingt.io and Statsignal.
Some top alternatives to Uptrends includes Freshping, Uptime, DevMonitor.io, Monitis, SolarWinds Pingdom, Visualping, pingnow.io, Epic Ping, PingPing and Pingt.io.