Yes, both Uptrends and Odown offer a Free Trial.
Uptrends is designed for Large Enterprises, Medium Business and Small Business.
Odown is designed for Medium Business and Small Business.
Pricing for Uptrends Starts at $15.47/Month when Billed Yearly whereas for Odown Starts at $8.33/Month when Billed Yearly.
Some top alternatives to Uptrends includes Freshping, Uptime, DevMonitor.io, Monitis, SolarWinds Pingdom, Visualping, pingnow.io, Epic Ping, PingPing and Pingt.io.
Some top alternatives to Odown includes Uptime, Uptime Robot, Better Uptime, DevMonitor.io, UpTime.onl, OffAlerts, Uptrends, 66uptime and Pingt.io.