Yes, both Odown and Uptime offer a Free Trial.
Odown is designed for Medium Business and Small Business.
Uptime is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Odown Starts at $8.33/Month when Billed Yearly whereas for Uptime Starts at $15/Month when Billed Yearly.
Some top alternatives to Odown includes Uptime, Uptime Robot, Better Uptime, DevMonitor.io, UpTime.onl, OffAlerts, Uptrends, 66uptime and Pingt.io.
Some top alternatives to Uptime includes Uptime Robot, Super Monitoring, Dotcom Monitor, DevMonitor.io, UpTime.onl, Odown, Downtime Monkey, SiteUptime, updown.io and SolarWinds Pingdom.